工程结构中支撑减震结构响应及力学性能研究  

Study on the Response and Mechanical Properties of Braced Structures in Engineering Structures

作　　者：史少华[1] 石若利 刘涛 SHI Shaohua;SHI Ruoli;LIU Tao(School of Architecture and Planning,Yunnan University,Kunming 650500,China;School of Architectural Engineering,Sichuan University of Arts and Science,Dazhou 63500,China)

机构地区：[1]四川文理学院建筑工程学院,四川达州635000 [2]云南大学建筑与规划学院,昆明650500

出　　处：《华南地震》2021年第3期63-70,共8页South China Journal of Seismology

基　　金：国家自然科学基金项目:“西南高寒地区冰积土坝料流固耦合宏细观渗流变形本构关系研究”(11862024);国家自然科学基金项目“高地震烈度高寒地区尾矿坝水力耦合作用下动力失稳机制研究”(51264037);校级自然科学基金项目:“云南大理白族新型社区建筑城镇适应性研究”(2020226)。

摘　　要：为研究不同支撑方式对钢结构抗震性能的影响,利用PKPM对某8层钢结构建筑进行建模,再对模型进行反应谱和Pushover分析,对比分析了四种支撑方案下的用钢量、基底剪力、层间位移等多种评价指标,在分析计算的基础上探讨支撑布置的影响规律。结果表明:四种布置支撑的方式均可使结构的抗侧刚度有较大的提高,不同的支撑布置方式对构件的挠度和应力比有一定程度的区别,采用方案一,结构的抗侧刚度提高显著,在小震和大震的作用下侧移均较小,其基底剪力显著大于其他三种方案,需要格外关注结构的基底应力变化;采用方案三和四,可以一定程度地减少结构成本,其在地震作用下的结构响应相对较不稳定,但也能保持较大的抗侧刚度,其结构响应的各项指标均能满足规范要求;采用方案二,其结构响应在所选方案中表现最不理想,但其能最大限度地将用钢量的消耗降低,同时地震作用下各结构响应指标均能满足的规范要求,在施工条件用钢量、作业环境等条件受限的情况下,可优先考虑采取此方案。In order to study the influence of different support modes on the seismic performance of steel structures,this paper uses PKPM to model an 8-story steel structure building,then carries out response spectrum and pushover analysis on the model,compares and analyzes various evaluation indexes such as steel consumption,base shear and inter story displacement under four support schemes,and discusses the influence law of support layout on the basis of analysis and calculation.The results show that the lateral stiffness of the structure can be greatly improved by four support arrangements.Different support arrangements reduce the deflection and stress ratio of the members to a considerable extent,but they are different;In scheme 1,the lateral stiffness of the structure is significantly improved,the lateral displacement is small under the action of small and large earthquakes,and the base shear is significantly greater than the other three schemes.Special attention should be paid to the change of base stress of the structure.After checking calculation,the maximum stress of the structure base in this scheme is still less than the bearing capacity of the structure;By adopting schemes 3 and 4,the structural cost can be reduced to a certain extent.The structural response under earthquake is relatively unstable,but it can also maintain a large degree of lateral stiffness,and all indexes of structural response can meet the requirements of the code;If scheme 2 is adopted,its structural response is the most unsatisfactory in the selected scheme,but it can reduce the consumption of steel consumption to the greatest extent and meet the specification requirements of various structural response indicators under earthquake.This scheme can be considered when the construction conditions,steel consumption,working environment and other conditions are limited.

关 键 词：框架支撑 支撑方式 抗震性能 结构响应 

分 类 号：TU391[建筑科学—结构工程]