基于破坏概率的大跨度柱面网架不规则结构风灾易损性分析  

Analysis of Wind Disaster Vulnerability of Irregular Long-Span Cylindrical Grid Structure Based on Failure Probability

作　　者：柴云霏 范存新[1] CHAI Yunfei;FAN Cunxin(School of Civil Engineering,Suzhou University of Scienee and Technology,Suzhou 215011,China)

机构地区：[1]苏州科技大学土木工程学院,苏州215011

出　　处：《结构工程师》2022年第3期67-74,共8页Structural Engineers

基　　金：国家自然科学基金资助项目(51208377);教育部留学回国人员科研启动基金(第48批)。

摘　　要：为更有效地评估结构抗风性能、对结构进行合理的风灾预测,本文对大跨度不规则网架结构有限元模型进行风灾易损性分析,以期对柱面网架结构抗风设计规范的编制提供依据。利用AR线性滤波法编制大跨空间结构内多点脉动风速的模拟程序,依托工程实例构建三维模型,结合ANSYS动力分析模块与APDL参数化设计语言对结构进行风振响应时程分析。根据对计算结果的统计分析,通过定义损伤指数的方法得到结构不同破坏状态的发生概率,绘制结构在0°和90°风向角下的易损性曲线。结果表明:该结构有着较强的抗倒塌能力,但是在强风作用下各类破坏的发生概率仍然不容小觑,在结构设计中应该引起足够重视。In order to evaluate the wind resistance of the structure more effectively and make a reasonable wind disaster prediction of the structure,this paper analyzes the wind disaster vulnerability of the finite element model of the large-span irregular grid structure.It is hoped that the wind resistance design specification of the cylindrical grid structure can be analyzed.The establishment has a positive effect.The specific method is to use the AR linear filtering method to compile a simulation program of multi-poin pulsating wind speed in a large-span spatial structure,build a three-dimensional model based on engineering examples,and combine the ANSYS dynamic analysis module and APDL parameterized design language to analyze the wind-induced response time history of the structure.According to the statistical analysis of the results,the probability of occurrence of different failure states of the structure is obtained by the method of defining the damage index,and the vulnerability curve of the structure under the wind direction angle of 0°and90°will be drawn.The results show that the structure has a strong ability to resist collapse,but the probability of occurrence of various types of damage under the action of strong wind is still not to be underestimated,and attention should be paid to the structure design.

关 键 词：大跨网架 时程分析 风振响应 损伤指数 风灾易损性 

分 类 号：TU312.3[建筑科学—结构工程] TU356