钢结构不均匀沉降下抗弯框架结构的地震易损性分析  

Seismic Vulnerability Analysis of Flexural Frame Structures Under Uneven Settlement of Steel Structures

作　　者：马艳梅[1] MA Yanmei(School of Intelligence and Electrical Engineering,Huainan Vocational Technical College,Huainan 232001,China)

机构地区：[1]淮南职业技术学院智能与电气工程学院,安徽淮南232001

出　　处：《太原学院学报（自然科学版）》2024年第1期1-6,共6页Journal of TaiYuan University:Natural Science Edition

基　　金：安徽省自然科学基金项目(KJ2021A1582);淮南职业技术学院自然科学研究项目(HKJ21-6);安徽省高等学校省级质量工程项目(2021xnfzxm089);安徽省高等学校省级质量工程项目(2021jyxm1385)。

摘　　要：地基沉降不均匀是湿陷性黄土区常见的工程问题之一。为研究不均匀地基沉降对钢结构抗震性能的影响,采用增量动力分析方法,分析钢结构中抗弯框架结构框架的抗震脆弱性。分析了结构地震响应与地基不均匀沉降的关系差异。在此基础上,根据不同的加速度峰值振幅,对结构的破坏概率进行了分析。分析结果表明,由于不均匀沉降而导致的结构内力重新分配是导致部分构件在地震中失效的原因。在建筑物的平面转角上,由于基础的不均匀性,会导致结构在地震中被进一步破坏。非均匀沉降引起的框架结构的偏移增大。且随着沉降的增加,上层建筑的地震破坏将加剧。Uneven foundation settlement is one of the common engineering problems in collapsible loess areas.In order to study the influence of uneven foundation settlement on the seismic performance of steel structures,the incremental dynamic analysis(IDA)method is used to analyze the seismic vulnerability of flexural frame structures in steel structures.The changing relationship between the seismic response of the structure and the uneven settlement of the foundation is analyzed.On this basis,the failure probability of the structure is analyzed according to different peak acceleration amplitudes.The analysis results show that redistribution of internal force of the structure due to uneven settlement leads to failure of some components in an earthquake.On the plane corner of the building,due to the nonuniformity of the foundation,the structure will be further damaged in theearthquake.The deflection of the flexural frame structure caused by non-uniform settlement increases.And with the increase of settlement,the seismic damage of the superstructure intensifies.

关 键 词：钢结构 不均匀沉降 框架结构 地震 

分 类 号：TU311.3[建筑科学—结构工程]