Template-Type: ReDIF-Article 1.0
Author-Name: Fabio Borghetti
Author-X-Name-First: Fabio
Author-X-Name-Last: Borghetti
Author-Name: Boris Petrenj
Author-X-Name-First: Boris
Author-X-Name-Last: Petrenj
Author-Name: Paolo Trucco
Author-X-Name-First: Paolo
Author-X-Name-Last: Trucco
Author-Name: Veronica Calabrese
Author-X-Name-First: Veronica
Author-X-Name-Last: Calabrese
Author-Name: Marco Ponti
Author-X-Name-First: Marco
Author-X-Name-Last: Ponti
Author-Name: Giovanna Marchionni
Author-X-Name-First: Giovanna
Author-X-Name-Last: Marchionni
Title: Multi-level approach to assessing the resilience of road network infrastructure
Abstract:
A two-step method to assess the resilience of road network infrastructures is developed to support resilience capacity building. The first step exploits the DMCI (<i>dynamic functional modelling of vulnerability and interdependency of critical infrastructure</i>) modelling approach for transportation network characterisation. DMCI reveals the cascading effects under disruption (due to interdependencies), and ranks the road sections according to their criticality (<i>vital node analysis</i> - <i>VNA</i>). The second step uses a quantitative <i>coping capacity index</i> (<i>CCI</i>) to assess in more detail the capacity of operators and first responders to cope with an incidental event coordinating all available resources, in order to respond and rapidly recover service operations managing all the relevant interdependencies. The combination of the two levels of analysis offers more comprehensive insights on a transportation network resilience and its intended use is to guide resilience planning within capacity building programs, at both intra- and inter-organisational levels.
Journal: Int. J. of Critical Infrastructures
Pages: 97-132
Issue: 2
Volume: 17
Year: 2021
Keywords: critical infrastructure; transportation infrastructure; resilience; emergency management; response and recovery; simulation.
File-URL: http://www.inderscience.com/link.php?id=116856
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Handle: RePEc:ids:ijcist:v:17:y:2021:i:2:p:97-132

Template-Type: ReDIF-Article 1.0
Author-Name: Peter Klein
Author-X-Name-First: Peter
Author-X-Name-Last: Klein
Title: Dynamics of interdependent critical infrastructures - a prioritised distribution model
Abstract:
Previous research articles about interdependent critical infrastructures developed different mathematical models describing the dynamic direct and indirect interactions of these infrastructures. Many of these models use discrete time steps to show how a reduced operability of one infrastructure <i>C</i> at time <i>t</i> will lead at time <i>t</i> + 1 to reductions in all infrastructures to which <i>C</i> distributes its output; and many of them use a standard mode of distribution which will be called proportional. According to a recent result, with this proportional distribution a reduced operability in only one infrastructure will lead to an enduring reduction of <i>all</i> operabilities even after full repairs of all damages. This research replaces this proportional mode by a newly defined prioritised one. It shows that a system with prioritised distribution mode leads in nearly all practical cases to an increased behaviour of the whole system: after repair of all damages, all infrastructures will return <i>automatically</i> to full operability.
Journal: Int. J. of Critical Infrastructures
Pages: 148-169
Issue: 2
Volume: 17
Year: 2021
Keywords: critical infrastructure; CI; disruption; proportional/prioritised distribution; operability; intrinsic capacity; perturbation.
File-URL: http://www.inderscience.com/link.php?id=116857
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Handle: RePEc:ids:ijcist:v:17:y:2021:i:2:p:148-169

Template-Type: ReDIF-Article 1.0
Author-Name: Guizhen Wang
Author-X-Name-First: Guizhen
Author-X-Name-Last: Wang
Title: Performance test on resistance to chloride ion corrosion in concrete structure added with special protection in road and bridge engineering
Abstract:
In view of the intrusion of seawater into concrete structures, a large number of harmful substances, especially chloride ions, can be brought in, which can significantly shorten the actual service life of concrete structures, resulting in serious waste of resources. In this paper, the chloride ion accelerated corrosion test on the concrete structure of road and bridge engineering is carried out to test the chloride ion concentration in different depths of concrete with special protection and without special protection at different corrosion times, and the effect of special protection is studied to study the diffusion coefficient and chloride ion concentration on the concrete surface of road and bridge engineering. The test results show that the diffusion coefficient of chloride ion in concrete can be reduced by 31.3% and the concentration of chloride ion on concrete surface can be reduced by 22.67% by special protective measures.
Journal: Int. J. of Critical Infrastructures
Pages: 133-147
Issue: 2
Volume: 17
Year: 2021
Keywords: concrete structure; chloride ion; special protection; performance test.
File-URL: http://www.inderscience.com/link.php?id=116868
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Handle: RePEc:ids:ijcist:v:17:y:2021:i:2:p:133-147

Template-Type: ReDIF-Article 1.0
Author-Name: Ximei Guo
Author-X-Name-First: Ximei
Author-X-Name-Last: Guo
Author-Name: Huawu Lu
Author-X-Name-First: Huawu
Author-X-Name-Last: Lu
Title: 3D simulation research on the damage of load-bearing structure of prefabricated building based on BIM model
Abstract:
In order to overcome the problems of low detection accuracy and poor detection performance existing in the traditional method of building load-bearing structure damage simulation, this paper proposes a new three-dimensional simulation detection system of building load-bearing structure damage based on BIM model. The system obtains the data of the load-bearing structure of the prefabricated building through the relevant monitoring equipment and 3D laser scanner. The data processing layer constructs the safety rule base, realises the data format transformation, noise filtering and transmission to the application layer. The application layer realises the damage detection of the load-bearing structure of the prefabricated building through the structure damage detection method based on 3D laser scanning and BIM. The experimental results show that compared with the traditional damage detection system, the system has a higher accuracy of damage detection, which can detect only 0.02 mm long damage in the load-bearing structure of prefabricated buildings.
Journal: Int. J. of Critical Infrastructures
Pages: 170-186
Issue: 2
Volume: 17
Year: 2021
Keywords: BIM model; prefabricated building; bearing structure damage; 3D simulation.
File-URL: http://www.inderscience.com/link.php?id=116883
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Handle: RePEc:ids:ijcist:v:17:y:2021:i:2:p:170-186

Template-Type: ReDIF-Article 1.0
Author-Name: Patricia A. Quigley
Author-X-Name-First: Patricia A.
Author-X-Name-Last: Quigley
Author-Name: Resit Unal
Author-X-Name-First: Resit
Author-X-Name-Last: Unal
Author-Name: Paul W. Stackhouse Junior
Author-X-Name-First: Paul W. Stackhouse
Author-X-Name-Last: Junior
Author-Name: Stephen J. Cox
Author-X-Name-First: Stephen J.
Author-X-Name-Last: Cox
Title: A predictor analysis framework for surface radiation budget reprocessing using satellite data
Abstract:
Equipped with various types of imagers, lasers and radars, dozens of satellites orbit the earth every day collecting and relaying data for weather and atmospheric analysis, communication and navigation applications and planetary studies. Earth orbiting satellites are part of the critical space infrastructures. NASA's Global Energy and Water Cycle (GEWEX) surface radiation budget (SRB) shortwave algorithm derives long-term datasets from satellite data of the distribution of the sun's energy to the surface and back to space. This paper presents an analysis framework to describe propagation of input parameter variability to output data results in algorithmic computations, and then quantify the variability in the solution sets. The SRB shortwave algorithm and design of experiments (DOE) methods are utilised to determine significant input parameters and interactions. A sensitivity analysis is also conducted to determine the variability in the output data for each dependent variable varying within their range using Monte Carlo simulation.
Journal: Int. J. of Critical Infrastructures
Pages: 71-85
Issue: 1
Volume: 17
Year: 2021
Keywords: surface radiation budget; SRB; variability; design of experiments; DOE; augmented minimum point designs; GEWEX SRB.
File-URL: http://www.inderscience.com/link.php?id=114340
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Handle: RePEc:ids:ijcist:v:17:y:2021:i:1:p:71-85

Template-Type: ReDIF-Article 1.0
Author-Name: Rui-duo Li
Author-X-Name-First: Rui-duo
Author-X-Name-Last: Li
Author-Name: Ying-zhi Xia
Author-X-Name-First: Ying-zhi
Author-X-Name-Last: Xia
Title: Study on rheological properties of EVA modified asphalt based on fractional derivative theory
Abstract:
Based on the fractional derivative theory, the relation between fractional derivative operator and power function empirical creep equation has been established. And the physical meaning of the power function parameters has been clarified. Ethylene-vinyl acetate (EVA) has been used as additives to prepare modified asphalt with content of EVA modifier varying from 0% to 9% in increments of 3% by weight of asphalt. Dynamic frequency sweep tests have been conducted on EVA modified asphalt using dynamic shear rheometer at 30°C, 40°C, 50°C, and 60°C. The complex shear modulus and the rutting factor of the asphalt modified by EVA increase with the increase of EVA content and decrease with the increase of temperature. The results indicate that the EVA modified asphalt reduced thermal sensitivity and increased resistance to permanent at high temperatures. Also, the power function parameters of EVA modified asphalt have been studied and analysed based on fractional derivative theory.
Journal: Int. J. of Critical Infrastructures
Pages: 86-96
Issue: 1
Volume: 17
Year: 2021
Keywords: fractional derivative; power function empirical creep equation; EVA modified asphalt; dynamic shear rheological tests; frequency sweep; high temperature stability.
File-URL: http://www.inderscience.com/link.php?id=114352
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Handle: RePEc:ids:ijcist:v:17:y:2021:i:1:p:86-96

Template-Type: ReDIF-Article 1.0
Author-Name: Jian-hua Zhang
Author-X-Name-First: Jian-hua
Author-X-Name-Last: Zhang
Title: Force analysis of variable cross-section continuous box girder bridge
Abstract:
In order to study the distribution of stress and deformation of variable cross-section continuous box girder bridge, in this paper, the finite element method is used to establish the model of variable cross-section continuous box girder bridge. Considering the layout of lane load, the combination of working conditions is calculated, and the stress and deformation of variable cross-section continuous box girder bridge are analysed. The results show that the maximum stress of the bridge generally occurs at the continuous beam span middle section or support, and sometimes the stress value at the vehicle load point is also large. These positions with large stress values should be considered in the design of box girder. The vertical displacement of bridge is small, removing settlement of end support. The maximum vertical displacement of bridge span middle section is 15 mm, and the bridge design scheme is safe, reliable and economical.
Journal: Int. J. of Critical Infrastructures
Pages: 38-53
Issue: 1
Volume: 17
Year: 2021
Keywords: continuous box girder; bridge; finite element method; simulation model; analysis path.
File-URL: http://www.inderscience.com/link.php?id=114353
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Handle: RePEc:ids:ijcist:v:17:y:2021:i:1:p:38-53

Template-Type: ReDIF-Article 1.0
Author-Name: Guang-yao Zhang
Author-X-Name-First: Guang-yao
Author-X-Name-Last: Zhang
Author-Name: Wei Xie
Author-X-Name-First: Wei
Author-X-Name-Last: Xie
Author-Name: Qiu-gui Yang
Author-X-Name-First: Qiu-gui
Author-X-Name-Last: Yang
Author-Name: Jinshan Luo
Author-X-Name-First: Jinshan
Author-X-Name-Last: Luo
Title: Research on open cut blasting technology of reservoir diversion tunnel
Abstract:
In order to study the andesitic porphyrite failure rule of open-cut blasting in diversion tunnel of reservoir, taking the Qianping reservoir project as an example through blasting test and vibration detection, field observation, statistical analysis and numerical simulation, the blasting technology of open cut diversion tunnel of reservoir is studied. Finite element method software ANSYS was used to establish the finite element calculation model of open cut diversion tunnel of Qianping reservoir. The andesitic porphyrite blasting process is simulated by using the dynamic analysis module LS-DYNA in ANSYS. The simulation results are compared with the test results, determining the optimal design scheme for open cut blasting of diversion tunnel. Numerical analysis and test results show that andesitic porphyrite blasting excavation is suitable for blasting parameters in I-2 area. The three-dimensional numerical model, firstly established in this paper, can be used to guide similar blasting schemes. The research results are of guiding value to similar projects.
Journal: Int. J. of Critical Infrastructures
Pages: 21-37
Issue: 1
Volume: 17
Year: 2021
Keywords: reservoir; diversion tunnel; blasting technology; andesitic porphyrite; finite element method; simulation model.
File-URL: http://www.inderscience.com/link.php?id=114354
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Handle: RePEc:ids:ijcist:v:17:y:2021:i:1:p:21-37

Template-Type: ReDIF-Article 1.0
Author-Name: Jianhong Xu
Author-X-Name-First: Jianhong
Author-X-Name-Last: Xu
Title: Truss construction of green fabricated steel structure based on BIM intelligent technology
Abstract:
In order to overcome the problems of stability and deformation in the construction of green assembly steel structure truss assisted by common technology, a construction method of green assembly steel structure truss based on BIM intelligent technology is proposed. The construction management platform is constructed by BIM intelligent technology. The truss construction is designed based on BIM intelligent technology, and the truss stress test and truss deformation test are carried out. The experimental results show that the method has better strain and deformation properties than the conventional process. Based on BIM technology, the maximum displacement and stress of truss are 4.04 mm and −37.7 MPa respectively, which meet the requirements of stability and strength, and ensure the safety in the construction process. Practice shows that this method is more conducive to ensure the rationality and scientificity of truss construction, so as to improve the overall quality of green assembly building.
Journal: Int. J. of Critical Infrastructures
Pages: 54-70
Issue: 1
Volume: 17
Year: 2021
Keywords: BIM intelligent technology; green fabricated building; steel structure; truss construction.
File-URL: http://www.inderscience.com/link.php?id=114355
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Handle: RePEc:ids:ijcist:v:17:y:2021:i:1:p:54-70

Template-Type: ReDIF-Article 1.0
Author-Name: Dong-yu Ji
Author-X-Name-First: Dong-yu
Author-X-Name-Last: Ji
Author-Name: Xiao Mi
Author-X-Name-First: Xiao
Author-X-Name-Last: Mi
Title: Calculation and analysis of gully-buried prestressed inverted siphon structure
Abstract:
Inverted siphon is a kind of cross-channel building, in order to study the stress distribution law of the buried prestressed inverted siphon structure. The force and deformation characteristics of Xinanpu inverted siphon are analysed by finite element software. In the establishment of finite element calculation model, the arrangement of inverted siphon prestressed reinforcement and the setting of pier are considered. A separate reinforcement calculation model is used to simulate the effect of prestressed reinforcement by applying initial strain, the boundary condition of inverted siphon structure is simulated by the fixed constraint between inverted siphon and pier. By numerical simulation analysis of inverted siphon structure, the cloud maps of stress and displacement and path charts of inverted siphon under various cases are given, then the results are analysed to check the safety performance of inverted siphon, the research results provide a theoretical basis for construction organisation design.
Journal: Int. J. of Critical Infrastructures
Pages: 1-20
Issue: 1
Volume: 17
Year: 2021
Keywords: gully-buried inverted siphon; loss of prestress; structure design; numerical simulation; simulation analysis.
File-URL: http://www.inderscience.com/link.php?id=114356
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Handle: RePEc:ids:ijcist:v:17:y:2021:i:1:p:1-20

Template-Type: ReDIF-Article 1.0
Author-Name: Min Zhu
Author-X-Name-First: Min
Author-X-Name-Last: Zhu
Author-Name: Juncheng Peng
Author-X-Name-First: Juncheng
Author-X-Name-Last: Peng
Author-Name: Lixing Zhou
Author-X-Name-First: Lixing
Author-X-Name-Last: Zhou
Title: Fault recovery system for smart grid based on machine statistical learning
Abstract:
In order to overcome the problems of poor robustness, low-accuracy and long time-consuming when traditional system recovers power grid faults, a fault recovery system based on machine statistical learning is designed. The system framework consists of sensing layer, network layer and application layer. Through the overall framework of the system, the hardware of the system is designed, including data acquisition device block, transmission device, analysis module and display device. In the software part, fault acquisition subroutine, fault location subroutine and fault type identification subroutine are designed to obtain accurate fault data. Finally, machine statistical learning method is used to complete the design of fault recovery subroutine of smart grid, recover the obtained fault data and realise the design of fault recovery system of smart grid. The results show that the robustness, accuracy and time-consumption of the system are improved, and the problems existing in the traditional system are solved.
Journal: Int. J. of Critical Infrastructures
Pages: 271-287
Issue: 3
Volume: 17
Year: 2021
Keywords: machine statistical learning; smart grid; fault; recovery system.
File-URL: http://www.inderscience.com/link.php?id=118196
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Handle: RePEc:ids:ijcist:v:17:y:2021:i:3:p:271-287

Template-Type: ReDIF-Article 1.0
Author-Name: Ming-fei Qu
Author-X-Name-First: Ming-fei
Author-X-Name-Last: Qu
Author-Name: Nan Chen
Author-X-Name-First: Nan
Author-X-Name-Last: Chen
Author-Name: Yong-qi Liu
Author-X-Name-First: Yong-qi
Author-X-Name-Last: Liu
Title: Grid-connected control method for new energy inverter based on single chip micyoco
Abstract:
In order to solve the problem of the output oscillation of the new energy power system when switching the inverter mode and affecting the stability of the new energy power system, this paper proposes a grid-connected control method for new energy inverter based on single chip micyoco. The block diagram of the seamless switch control of the inverter and the mathematical model of the LCL filter are established, and the relationship between the inductance of the power grid, the filter capacitance and the inductance of the rectifying side is determined. Through the operation of two modes of island grid-connected and island grid-connected voltage regulation, the seamless switching control of the new energy inverter is realised. The experimental results show that this method can effectively suppress the transient shock caused by the switching of grid-connection mode and improve the stability of the new energy power generation system.
Journal: Int. J. of Critical Infrastructures
Pages: 204-215
Issue: 3
Volume: 17
Year: 2021
Keywords: single chip micyoco; new energy; inverter; grid-connected control.
File-URL: http://www.inderscience.com/link.php?id=118197
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Handle: RePEc:ids:ijcist:v:17:y:2021:i:3:p:204-215

Template-Type: ReDIF-Article 1.0
Author-Name: Qiuyuan Zheng
Author-X-Name-First: Qiuyuan
Author-X-Name-Last: Zheng
Author-Name: Qiang Wu
Author-X-Name-First: Qiang
Author-X-Name-Last: Wu
Author-Name: Lianhang Fang
Author-X-Name-First: Lianhang
Author-X-Name-Last: Fang
Author-Name: Wangcheng Zhu
Author-X-Name-First: Wangcheng
Author-X-Name-Last: Zhu
Author-Name: Yu Liang
Author-X-Name-First: Yu
Author-X-Name-Last: Liang
Author-Name: Zhiwei Cai
Author-X-Name-First: Zhiwei
Author-X-Name-Last: Cai
Title: Research on hierarchical response recovery method of distribution network fault based on topology analysis
Abstract:
In order to overcome the problem of long recovery time in traditional fault recovery methods, a novel hierarchical response recovery method for distribution network fault based on topological analysis is proposed in this paper. This method simplifies the structure of complex distribution network, removes the non-concerned nodes in the connection relationship of distribution network, and uses the search method to analyse the distribution network topology, and traverses the distribution network topology nodes through the breadth-first search algorithm. By establishing the fault judgment matrix to locate the faults, an architecture of hierarchical response fault recovery is designed. Membrane computing algorithm is used to restore the hierarchical fault response of distribution network. The experimental results show that the proposed method takes less than 0.8 s to recover from faults and has a shorter recovery time. The response delay is always less than 0.3 ms, and the response delay is low.
Journal: Int. J. of Critical Infrastructures
Pages: 216-236
Issue: 3
Volume: 17
Year: 2021
Keywords: topology analysis; distribution network faults; hierarchical response recovery; search method; membrane computing algorithm.
File-URL: http://www.inderscience.com/link.php?id=118198
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Handle: RePEc:ids:ijcist:v:17:y:2021:i:3:p:216-236

Template-Type: ReDIF-Article 1.0
Author-Name: Weizhuo Zhao
Author-X-Name-First: Weizhuo
Author-X-Name-Last: Zhao
Title: Three-dimensional collapse simulation on the spatial structure of concrete assembly building based on BIM
Abstract:
In order to overcome the problems of inaccurate load data and large simulation error in the existing collapse simulation methods of prefabricated building spatial structure, this paper proposes a BIM based 3D collapse simulation method of concrete prefabricated building spatial structure. The framework of simulation numerical model is constructed, the internal force relationship is determined, the load displacement data of current space collapse is obtained from multiple angles, the simulation parameters of current data results are selected to simulate materials, the current constitutive relationship is determined under the BIM model relationship, and the data extraction and stress conversion are completed based on the BIM model to realise the collapse simulation of building structures. The experimental results show that compared with the traditional method, the load data of this method is more accurate, and the collapse simulation process is more in line with the real situation.
Journal: Int. J. of Critical Infrastructures
Pages: 251-270
Issue: 3
Volume: 17
Year: 2021
Keywords: building information model; BIM; concrete; assembly building; collapse; numerical simulation.
File-URL: http://www.inderscience.com/link.php?id=118206
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Handle: RePEc:ids:ijcist:v:17:y:2021:i:3:p:251-270

Template-Type: ReDIF-Article 1.0
Author-Name: Zhou Yuan
Author-X-Name-First: Zhou
Author-X-Name-Last: Yuan
Title: A study on 3D visual identification of the top structure of assembly building based on BIM
Abstract:
In order to overcome the problem of low recognition rate of building image when constructing three-dimensional model with traditional methods, a new idea of top shape and structure model of assembly building based on BIM is proposed in this paper. The method calculates and identifies the structural parameters of the top contour of assembly building according to BIM technology, retrieves the internal model of the top contour structure of assembly building from the database which is consistent with the result of feature recognition, and obtains the three-dimensional construction of image surface and the three-dimensional modelling of scattered point cloud surface through digital camera and point cloud data, so as to build the final three-dimensional model. Finally, the three-dimensional visualisation of assembly is realised. The experimental results show that the proposed method has high recognition rate.
Journal: Int. J. of Critical Infrastructures
Pages: 187-203
Issue: 3
Volume: 17
Year: 2021
Keywords: BIM; assembly; buildings; top; shape structure; three-dimensional visualisation.
File-URL: http://www.inderscience.com/link.php?id=118224
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Handle: RePEc:ids:ijcist:v:17:y:2021:i:3:p:187-203

Template-Type: ReDIF-Article 1.0
Author-Name: Yu Shen
Author-X-Name-First: Yu
Author-X-Name-Last: Shen
Author-Name: Wei Hu
Author-X-Name-First: Wei
Author-X-Name-Last: Hu
Author-Name: Chengkuan Wan
Author-X-Name-First: Chengkuan
Author-X-Name-Last: Wan
Author-Name: Xiaoping Li
Author-X-Name-First: Xiaoping
Author-X-Name-Last: Li
Author-Name: Fan Yang
Author-X-Name-First: Fan
Author-X-Name-Last: Yang
Author-Name: Hao Tang
Author-X-Name-First: Hao
Author-X-Name-Last: Tang
Title: SOC equilibrium control of energy storage system based on cascaded H-bridge
Abstract:
Aiming at the imbalance of phase and SOC of H-bridge cascade energy storage system, based on the analysis of the topological structure and mathematical model of cascade energy storage system, this paper proposes a SOC equalisation control strategy for cascade energy storage system based on negative sequence voltage injection, and deduces and analyses the working principle of SOC adaptive equalisation control strategy. On the premise of not affecting the current response of the system, the interphase and intra-phase SOC balance of the cascade energy storage system can be realised. Finally, a cascaded energy storage system model is built in the MATLAB Simulink simulation environment. The simulation results verify the correctness and effectiveness of the proposed SOC adaptive equalisation control strategy.
Journal: Int. J. of Critical Infrastructures
Pages: 237-250
Issue: 3
Volume: 17
Year: 2021
Keywords: H-bridge converter; cascade energy storage system; SOC equalisation; negative sequence voltage; adaptive equalisation.
File-URL: http://www.inderscience.com/link.php?id=118229
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Handle: RePEc:ids:ijcist:v:17:y:2021:i:3:p:237-250