东南大学学报（自然科学版）2017，Vol.47Issue(4)：766-775,10.DOI:10.3969/j.issn.1001-0505.2017.04.022
罕遇地震下钢混组合结构损伤时变特性
Time-dependent damage characteristics of steel-concrete composite structures under rarely occurred earthquake
摘要
Abstract
For steel-concrete composite structure, the dynamic elastic-plastic time history analysis method is utilized to obtain the structural dynamic response under the rarely occurred earthquake.The seismic damage time-dependent model, which integrates global method and weighting combination method, respectively, is utilized to study the structural damage time-dependent characteristics under the rarely occurred earthquake.Considering that the parameters such as the stiffness and the damping are constants in the calculation but have the variable characteristics in the whole service period, they are treated as pseudo variables.A typical steel-concrete composite sample is studied.The results show that the damage has significantly time-dependent characteristics under rare earthquake and maybe exceeds the performance limits specified in the code.The stiffness change can cause the changes of lateral resistance force and earthquake conduction ability, thus leading to the significant fluctuations of the time-dependent damage.The influence of lateral resistance force on damage plays a dominant role.The more severe the earthquake, the greater the effect of earthquake conduction ability on damage.This can lead to more significant fluctuation of damage and vibration shapes.Comparing the time-dependent damage values and the design values without considering material time-dependent characteristics, it can be found that the material time-dependent characteristics have an important effect on the accuracy of the seismic design and evaluation.关键词
钢混凝土组合结构/时变损伤/时变特性/动力弹塑性时程分析Key words
steel-concrete composite structure/time-dependent damage/time-dependent characteristics/dynamic elastic-plastic time-history analysis分类
数理科学引用本文复制引用
王莹,王若竹,李兆霞..罕遇地震下钢混组合结构损伤时变特性[J].东南大学学报（自然科学版）,2017,47(4):766-775,10.基金项目
国家自然科学基金资助项目(51678135,51008069,11072060)、中央高校基本科研业务费专项资金资助项目. （51678135,51008069,11072060）
