钢框架结构的地震损伤研究  

Research on the Seismic Damage of Steel Frame Structure

作　　者：郑山锁[1] 代旷宇 孙龙飞[1] 杨威[1] 李文勇[1] 田微[2] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]西安建筑科技大学建筑设计研究院,陕西西安710055

出　　处：《地震工程学报》2015年第2期290-297,共8页China Earthquake Engineering Journal

基　　金：国家科技支撑计划(2013BAJ08B03);国家自然科学基金(50978218;51108376);高等学校博士学科点专项科研基金(20136120110003);陕西省科研项目(2012K12-03-01;2011KTCQ03-05;2013JC16)

摘　　要：基于预定损伤法对钢框架构件主要设计参数进行损伤敏感度分析,研究主要设计参数与钢框架结构梁、柱损伤的关系;揭示钢框架结构梁、柱的损伤及梁、柱线刚度比、结构高宽比、柱轴压比、锈蚀率对楼层损伤的影响规律;获得楼层的损伤与整体结构损伤的关系,最终建立钢框架结构的损伤演化模型。研究成果可为建立地震激励下钢框架结构的损伤模型提供理论基础和数据支持。Because of their light weight,high strength,and good seismic performance,steel structures are widely used in construction.At present,the research on the seismic performance and safety assessment of steel structures receives widespread attention at home and abroad;most of this research focuses on assessing the seismic performance of steel structures based on the performance design method,with little research on earthquake damage.Under such circumstances,the author firstly analyzed the main design parameters,such as web height,web thickness,flange width,and flange thickness,which affect the component damage evolution rule,and the author found that the most sensitive design parameters are web height and flange width,which provided a theoretical basis for the establishment of the storey damage model.Then,according to the analysis results,we obtained the damage value relationship between the frame beam,frame column,and storey damage evolution and analyzed the effect of sensitive factors on storey damage evolution,such as the stiffness ratio of column to beam,the height-width ratio of the structure,the axialcompression ratio of the frame column,and the steel corrosion rate.Finally,in order to study the influence of storey damage location and degree to the seismic damage of the steel frame structure,the author revealed the influence of storey damage on structural damage by analyzing the effect of single-storey steel frame structure damage on structural dynamic characteristics under El Centro seismic wave excitation.Inputting multiple seismic waves,the author got the relation between the damage value of structural integrity and the velocity-to-acceleration ratio of the seismic wave peak and ultimately established the damage evolution model of steel frame structures.The multi-level damage evolution model of＂component-storey-structure＂can provide the theoretical foundation and basic data support for establishing the storey damage model of steel frame structures under seismic excitation.

关 键 词：钢框架结构 设计参数 损伤敏感度 损伤模型 损伤表征 

分 类 号：TU528.01[建筑科学—建筑技术科学]