桥梁倒塌分析有限元后处理关键技术
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摘要
为辅助桥梁倒塌事故责任鉴定,系统研究了桥梁倒塌过程分析有限元后处理相关关键技术,具体包括以下内容:(1)设计了基于面向对象思想自主开发的有限元后处理程序总体架构;(2)研究并编程实现了大文件分块读取、单元生死显示等后处理关键技术;(3)在简化处理总体应力磨平方法的基础上,研究了实体单元高斯点应力外推节点应力算法;(4)用C#和VS.net 2005开发了有限元计算结果及重要性评价云图显示程序;(5)分别在双跨石拱桥模型、悬臂箱梁模型和堤溪沱江大桥倒塌过程分析中对上述后处理关键技术进行了应用和验证。研究结果表明:(1)用开发的后处理系统进行有限元后处理计算是可行的,其结果与Abaqus和SM-Solver计算结果基本一致;(2)采用分块读取有限元计算结果大文件可以有效提高桥梁倒塌过程显示的流畅性;(3)单元生死显示模块可以动态地展现桥梁倒塌过程,为事故原因分析提供技术支持。
In order to assist the responsibility identification of accidents of bridge collapse,the related key technologies of finite element post-processing for analysis of bridge collapsing process are researched systematically.It includes the following aspects:(1) the general framework of self-developed program for finite element post-processing on the basis of object-oriented idea is designed;(2) the key technologies like blocking read of large files and display of element birth and death are discussed and programmed;(3) the extrapolation of node stress from Gauss point stress in solid element is discussed after simplifying the method of general stress smoothing;(4) the display program for FE calculation results and importance evaluation nephogram is developed with C# and VS.net 2005;(5) the above related key technologies are applied and verified in the models of double-span stone arch bridge,cantilever box-beam and Dixi Tuojiang bridge respectively.The results indicate that(1) it is feasible to use the developed program for finite element post-processing calculation,and the result conforms well to those obtained by Abaqus and SM-Solver;(2) reading the large files of finite element calculation result by block can effectively make the display of bridge collapsing process smoother;(3) the display module of element birth and death can dynamically show the bridge collapsing process,which can provide help for the analysis of the cause of accident.
In order to assist the responsibility identification of accidents of bridge collapse,the related key technologies of finite element post-processing for analysis of bridge collapsing process are researched systematically.It includes the following aspects:(1) the general framework of self-developed program for finite element post-processing on the basis of object-oriented idea is designed;(2) the key technologies like blocking read of large files and display of element birth and death are discussed and programmed;(3) the extrapolation of node stress from Gauss point stress in solid element is discussed after simplifying the method of general stress smoothing;(4) the display program for FE calculation results and importance evaluation nephogram is developed with C# and VS.net 2005;(5) the above related key technologies are applied and verified in the models of double-span stone arch bridge,cantilever box-beam and Dixi Tuojiang bridge respectively.The results indicate that(1) it is feasible to use the developed program for finite element post-processing calculation,and the result conforms well to those obtained by Abaqus and SM-Solver;(2) reading the large files of finite element calculation result by block can effectively make the display of bridge collapsing process smoother;(3) the display module of element birth and death can dynamically show the bridge collapsing process,which can provide help for the analysis of the cause of accident.
引文
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[10]杜青,蔡美峰,张献民,等.粘贴钢板加固钢筋混凝土矩形受弯构件的非线性有限元数值模拟[J].公路交通科技,2005,22(5):97-100.DU Qing,CAI Mei-feng,ZHANG Xian-min,et al.Nonlinear Numerical Simulation of Rectangular RCMembers with Steel-adhered Reinforcement in Bend[J].Journal of Highway and Transportation Research andDevelopment,2005,22(5):97-100.
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[12]张治成.钢管混凝土拱桥混凝土灌注阶段的受力仿真分析[J].工程力学,2007,24(2):146-153.ZHANG Zhi-cheng.Simulation Analysis for MechanicBehavior of Concrete-filled Steel Tubular Arch Bridgeduring the Course of Core Concrete Pumping[J].Engineering Mechanics,2007,24(2):146-153.
[2]江晓峰,陈以一.建筑结构连续性倒塌及其控制设计的研究现状[J].土木工程学报,2008,41(6):1-8.JIANG Xiao-feng,CHEN Yi-yi.A Review on theProgressive Collapse and Control Design of BuildingStructures[J].China Civil Engineering Journal,2008,41(6):1-8.
[3]彭卫兵,赵麒麟,潘晓东,等.基于实体单元的桥梁截面内力计算研究[J].土木工程学报,2012,45(9):91-99.PENG Wei-bing,ZHAO Qi-lin,PAN Xiao-dong,et al.Study of Calculation for Internal Force of Complex BridgeSections Using Solid Elements[J].China CivilEngineering Journal,2012,45(9):91-99.
[4]卢啸,陆新征,张劲泉,等.某石拱桥连续倒塌模拟及构件重要性评价[J].兰州交通大学学报,2010,29(6):25-30.LU Xiao,LU Xin-zheng,ZHANG Jin-quan,et al.Progressive Collapse Simulation and Components ImportanceEvaluation of a Stone Arch Bridge[J].Journal of LanzhouJiaotong University,2010,29(6):25-30.
[5]许镇,任爱珠,张劲泉,等.基于有限元分析和虚拟现实技术的桥梁垮塌场景模拟[J].公路交通科技,2012,29(5):41-45.XU Zhen,REN Ai-zhu,ZHANG Jin-quan,et al.SceneSimulation of Bridge Collapse Based on Finite ElementAnalysis and Virtual Reality Technology[J].Journal ofHighway and Transportation Research and Development,2012,29(5):41-45.
[6]许镇,任爱珠,陆新征.基于Marc和OSG的桥梁垮塌场景模拟研究[C]∥第十五届全国工程设计计算机应用学术会议论文集:工程设计与计算机技术.哈尔滨:哈尔滨工业大学出版社,2010:8-12.XU Zhen,REN Ai-zhu,LU Xin-zheng.Research on theSimulation of Bridge Collapse Based on Marc and OSG[C]∥Proceedings of 15th Conference of ComputerApplication in Engineering Design:Engineering Designand Computer Technology.Harbin:Harbin Institute ofTechnology Press,2010:8-12.
[7]宋亮亮.拱桥三维建模及倒塌模拟分析[D].杭州:浙江工业大学,2009.SONG Liang-liang.Three-dimensional Modeling andCollapse Simulation Analysis of Arch Bridge[D].Hangzhou:Zhejiang University of Technology,2009.
[8]KUMAR P,BHANDARI N M.Non-linear Finite ElementAnalysis of Masonry Arches for Prediction of Collapse Load[J].Structural Engineering International,2005,15(3):166-175.
[9]陕光,凌玲,胡于进.内存映射文件在提取有限元模态结果中的应用[J].计算机应用,2012,32(5):1429-1432.SHAN Guang,LING Ling,HU Yu-jin.Application ofMemory-mapped File to Extract Modal Data from Results ofFinite Element Analysis[J].Journal of ComputerApplications,2012,32(5):1429-1432.
[10]杜青,蔡美峰,张献民,等.粘贴钢板加固钢筋混凝土矩形受弯构件的非线性有限元数值模拟[J].公路交通科技,2005,22(5):97-100.DU Qing,CAI Mei-feng,ZHANG Xian-min,et al.Nonlinear Numerical Simulation of Rectangular RCMembers with Steel-adhered Reinforcement in Bend[J].Journal of Highway and Transportation Research andDevelopment,2005,22(5):97-100.
[11]姜忻良,崔奕,李园,等.天津地铁盾构施工地层变形实测及动态模拟[J].岩土力学,2005,26(10):1612-1616.JIANG Xin-liang,CUI Yi,LI Yuan.Measurement andSimulation of Ground Settlements of Tianjin Subway ShieldTunnel Construction[J].Rock and Soil Mechanics,2005,26(10):1612-1616.
[12]张治成.钢管混凝土拱桥混凝土灌注阶段的受力仿真分析[J].工程力学,2007,24(2):146-153.ZHANG Zhi-cheng.Simulation Analysis for MechanicBehavior of Concrete-filled Steel Tubular Arch Bridgeduring the Course of Core Concrete Pumping[J].Engineering Mechanics,2007,24(2):146-153.
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