摘要
为了研究强余震对结构构件抗震性能的影响,设计了2个工字钢型钢混凝土柱,进行了10次循环加载和损伤后试件再次加载的低周往复加载静力试验。试验研究表明:随着循环加载次数的增加和试件的损伤,试件的滞回环面积、强度、刚度和等效黏滞阻尼系数等指标均呈现减小趋势,试验模拟的强余震作用导致试件的耗能能力和抗震性能出现劣化;在达到试件的承载能力极限状态前,第5次循环加载后各抗震性能指标曲线均趋向于稳定;超过试件承载能力极限状态后,循环加载次数的增加使试件的抗震性能指标出现不收敛。试验研究为揭示强余震对结构构件抗震性能的不利影响,完善抗震试验方法和抗震设计相关理论提供了数据支持。
To investigate the seismic behavior of reinforced concrete columns under strong aftershocks, low cyclic loading tests on two I-beam steel reinforced concrete （SRC） specimens were carried out, one for 10 cycles test of disposable loading specimen and one for once more test of injured specimen. Experimental results show that cyclic number and injury were the disadvantageous factors for the seismic performance of specimens, they lead to the seismic performance indexes such as hysteresis loop area, strength, stiffness and equivalent viscous damping coefficient decreased, and result in worse energy dissipation and lower seismic behavior. Before the ultimate bearing capacity value reached, the seismic performance indexes tended to be stable within 5 cycles. When the ultimate bearing capacity value outstripped, the seismic performance indexes would not converged with the cyclic number increase. The work will benefit the research on seismic performance of structures under strong aftersbock, and provide the data support for the development of seismic test method and seismic design theory.
出处
《地震工程与工程振动》
CSCD
北大核心
2015年第5期167-173,共7页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金资助项目(11272095
51378133)
住房和城乡建设部科技计划资助项目(2013-K4-38)
关键词
钢骨混凝土
柱
余震
抗震性能
低周往复加载静力试验
steel reinforced concrete
column
aftershock
seismic behavior
low cyclic loading test
作者简介
许勇（1975-），男，副教授，博士研究生，主要从事重大工程安全预警研究．E-mail：xyjerry1975@126．com
通讯作者：周翠英（1963-），女，教授，博士，主要从事重大工程安全预警研究．E-mail：zhoucy@mail．sysu．edu．cn
