节点文献
天津大剧院吊挂结构及天津图书馆结构抗连续倒塌分析
Progressive Collapse Analysis on the Suspension Structure of Tianjin Large Theater Building and the Steel Structure of Tianjin Library
【作者】 孙健;
【导师】 丁阳;
【作者基本信息】 天津大学 , 结构工程, 2012, 硕士
【摘要】 本文以天津大剧院采用的吊挂结构体系和天津图书馆结构采用的钢框架结构为研究对象,对结构的抗连续倒塌进行了分析。主要工作如下。(1)从设计指南、分析方法以及有限元数值模拟三个方面总结了国内外关于结构抗连续倒塌的研究现状;介绍了连续倒塌破坏的判定标准及分析方法。(2)以天津大剧院吊挂结构为工程背景,对其进行抗连续性倒塌性能分析。考虑吊杆布置对吊挂层抗连续倒塌能力的影响,根据其结构形式特点及构件的重要性系数,确定关键吊杆。分别模拟单根吊杆和2根吊杆同时失效,采用静力非线性和动力非线性的方法对剩余结构进行计算分析,根据分析结果,对吊挂结构抗连续倒塌能力做出评价,结合分析结果给出了在设计和使用过程中防止结构发生连续倒塌的建议。(3)天津图书馆主体结构采用钢框架-支撑组合结构与平面交叉桁架相结合的复杂结构形式,首先采用基于能量的方法分别计算各边中柱、角柱和内部部分框架柱的构件重要性系数,确定关键构件,模拟其发生破坏,对剩余结构抗连续倒塌能力做出评价。贯通核中1根贯通柱失效后,相邻的贯通柱和支撑可以有效把竖向力传递给其他的竖向受力构件,本文以贯通核A为分析对象,模拟了贯通柱与柱间支撑同时发生破坏的情况,对剩余结构的抗连续倒塌性能进行分析,根据分析结果提出相应的防范建议。平面交叉桁架在4-5层边缘位置形成局部悬挑结构,悬挑部位的腹杆内力相对较大,以其中某局部悬挑结构为分析对象,模拟该区域内力最大的腹杆发生破坏的情况,对剩余结构进行计算分析,根据计算结果提出对应的防范建议。
【Abstract】 This paper took the hanging structure system of Tianjian Theater and Tianjinlibrary main structure steel frame structure as the research object, the progressivecollapse resistance of structures are analyzed. The main work is as follow.(1)The domestic and overseas research status of structure progressive collapseresistance was summerised from three aspects,including guidance documents,analytical method and finite element simulation. What’s more, the evaluation criteriaand analytical method about damage of progressive collapse were also introduced.(2)Analysis of structure progressive collapse resistance was conducted based on thesuspended structure of Tianjin Theatre. The influence of the boom’s location on thecapacity of layer’s progressive collapse resistance was considered in the work, and thekey booms were identified according to structure features and components importancecoefficient. Given the simulative conditions of single boom and2booms to failure,the residual structure was calculated using static and dynamic nonlinear method.Evaluation about progressive collapse resistance of the suspended structure wascarried out according to the analysis result, and suggestions about structureprogressive collapse resistance in design and utilization were also proposed.(3)The main structure of Tianjin library using the complex structures of steel bracedframe structure with intersecting plane truss combination, at first basing on energymethod importance coefficients of components were calculated for the middle columnof each edge, corner column and the internal part of the frame column, then identifykey components. Simulation of the damage, the remaining structures to resistprogressive the ability to make the evaluation of collapse.Through core1throughcolumn failure, adjacent through column and support can effectively put the verticalforce transfer to other vertical force components, this paper through nuclear A as theobject of analysis, simulation through column and brace between columns at the sametime the failure condition, on the remaining structure progressive collapse resistanceanalysis, according to the results of analysis corresponding preventiverecommendations. Plane intersection truss in layer4-5formed local edge positioncantilevered structure, the internal force of ventral pole on cantilever parts is relatively large, with some local cantilever structure as the object of analysis, simulation of the regional force maximum abdominal rod failure situation, the remaining structures were calculated and analyzed according to the calculation results, it puts forward corresponding preventive recommendations.
【Key words】 Tianjin Large Theater Building; Tianjin Library; suspension structure; progressive collapse; key member; removal key member method; steel frame;