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| 1 | Collapse Simulation and Response Assessment of a Large Cooling Tower Subjected to Strong Earthquake Ground Motions显示文摘Large cooling towers in thermal power plants and nuclear power plants are likely to suffer from strong earthquakes during service periods.The resulting destructions of the cooling towers would endanger the power plants and threaten the security of the related areas.It is important to use effective means to evaluate the safety status of the cooling towers and guide further precautions as well as retrofitting efforts.This paper is therefore focused on an elaborate numerical investigation to the earthquake-induced collapses of a large cooling tower structure.A complete numerical work for simulation of material failure,component fracture,structural buckling and system collapse is presented by integrating the stochastic damage constitutive model of concrete,refined structural element models,and some other key techniques.Numerical results indicate that the damage behavior and collapse mode of the cooling tower are affected notably by the randomness specification of ground motions.The collapse mechanisms of the cooling tower are studied from the energy absorption and dissipation points of view.An effective energy-based criterion is introduced to identify the collapse of the cooling tower under ground motion excitations.While distinct collapse modes are observed,the collapse criterion can predict well the damage and failure of the cooling tower.The proposed methodology is vital to better understanding the disastrous mechanisms and potential failure paths in optimal design of the cooling towers to ensure safety. | Tiancan Huang Hao Zhou Hamid Beiraghi | 2020 | Computer Modeling in Engineering & Sciences2020，，5： | 2 |
| 2 | Supervised Image Segmentation Based on Tree-Structured MRF Model in Wavelet Domain显示文摘 | 1IU Guoying QIN Qianqing MEI Tiancan | | 0，，04： | 1 |
| 3 | Comparative Investigation of Two Random Medium Models for Concrete Mesostructure显示文摘Concrete is intrinsically endowed with randomness on meso-scale due to the random distribution of aggregates,mortar,etc.In this paper,two random medium models of concrete mesostructure are developed and comparative studies are provided based on random field representation approach.In the first place,concrete is considered as a kind of one-phase random field,where stochastic harmonic function is adopted as the approach to simulate the random field.Secondly,in order to represent the stochastic distribution of the multi-phase of concrete such as aggregates and mortar,two-phase random field based on the Nataf transformation and the Hermite polynomials are introduced.Then,the proposed two random medium models are testified by the multi-scale simulation results,specifically,the mean value of the homogenized stress-strain relationship and the damage evolution curve.Meanwhile,the generalized density evolution equation is utilized to measure the consistency of these two random medium models by the probability distribution of damage. | Shixue Liang Zhongshu Xie Tiancan Huang | 2020 | Computer Modeling in Engineering & Sciences2020，，6： | 0 |
| 4 | Focal Plane Image Assembly of Subpixel显示文摘This paper describes the scanning assembly principle and construction of scanning assembly sample.The factors that affect assembly accuracy are analyzed.There are two steps in CCD focal plane scanning assembly.The first is rough assembly,and the second is accurate assembly.In this paper,the moiré fringe is introduced in judging assembly accuracy directly and accurately.The equation for optical transmission characteristics of CCD Moiré fringes is presented.The measurement of Moiré fringes can be completed when some conditions are satisfied.2D_assembly error can be obtained by using digital correlation filtering technique.Finally,the result of focal plane scanning assembly is presented.The result is in good accordance with theory. | ZHONG Sidong MEI Tiancan SHI Zhongchao | 2002 | Geo-Spatial Information Science2002，5，4： | 0 |
| 5 | Introduction to the Special Issue Numerical Modeling and Simulation for Structural Safety and Disaster Mitigation显示文摘Natural disasters including earthquake,hurricane,tsunami,flood and wildfire,cause enormous loss of lives and properties for human society every year.The structures and infra-structures are built to protect the mankind from natural disasters,but their damage and failure sometimes become part of the disasters.Therefore,the structural safety and disaster mitigation have become timely research topics for safeguarding our society. | Xiaodan Ren Tiancan Huang | 2020 | Computer Modeling in Engineering & Sciences2020，，8： | 0 |
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