摘要
基于钢材力学性能随失重率的退化模型,结合国际标准化的腐蚀环境分类,构建了在役典型钢框架结构的材料时变本构模型,基于ABAQUS有限元平台建立了不同龄期、不同层数的典型钢框架结构多尺度有限元模型,选定PGA和θmax作为地震动强度指标和结构损伤指标,通过对所建立的有限元模型进行IDA分析得到了典型结构的地震概率需求模型,并建立了典型结构各损伤状态的量化限值,从而获得各龄期、各层数典型结构的易损性曲线.研究结果表明,典型钢框架结构的抗震能力随着服役龄期的增加而逐渐劣化;不同层数典型结构的抗震性能同样存在差异.
Based on the degradation model of mechanical properties of steel with weight loss rate,combined with the international standard corrosion environment classification,a time-varying constitutive model of materials for typical steel frame structures in service was constructed,a multi-scale finite element model of typical steel frame structures with three floor heights under four ages was established on the ABAQUS finite element platform,and the seismic probability demand model of typical structures was obtained by IDA analysis of the established finite element model by selecting PGA andθmax as ground motion strength indicators and structural damage indicators.The quantitative limits of each damage state of typical structures are established,so as to obtain the vulnerability curves of typical structures of various ages and layer heights.The results show that the seismic resistance of typical steel frame structures gradually deteriorates with the increase of age.The seismic performance of typical structures with different floor heights also varies.
作者
穆长俊
郑山锁
田忠祥
李永明
杨松
王天坤
MU Changjun;ZHENG Shansuo;TIAN Zhongxiang;LI Yongming;YANG Song;WANG Tiankun(School of Civil Engineering,Xi′an Univ.of Arch.&Tech.,Xi′an 710055,China;Construction Project Quality Supervision Station of Wangqing County Housing and Urban-Rural Development Bureau,Wangqing 133299,China;Key Lab of Structural Engineering and Earthquake Resistance,Ministry of Education(XAUAT),Xi′an 710055,China)
出处
《西安建筑科技大学学报(自然科学版)》
北大核心
2025年第5期698-709,共12页
Journal of Xi'an University of Architecture & Technology(Natural Science Edition)
基金
国家自然科学基金(52278530)
国家重点研发计划课题(2019YFC1509302)
陕西省重点研发计划(2021ZDLSF06-10)。
关键词
锈蚀
多龄期
时变本构模型
IDA分析
地震易损性
rust
multiple age groups
time-varying constitutive model
IDA
seismic fragility
