摘要
为了研究既有RC框架结构在钻芯检测后整体结构的抗震性能,应用ANSYS地震反应谱法对钻芯前后的RC框架结构开展多遇地震、设防地震、罕遇地震作用下的整体抗震性能研究。结果表明,各楼层相当钻芯数量时,结构的首层层间位移变化量最大;在不同设防烈度的地震作用下,其中多遇地震作用时,钻芯后的RC框架结构位移反应变化最大,最大偏差为6.41%;设防地震与罕遇地震作用时,钻芯后的RC框架结构位移反应变化相当,且均小于多遇地震作用下的影响。构件损伤分析结果表明,框架梁构件钻芯位置处均未出现明显应力集中损伤;钻芯位置出现应力集中的框架柱构件均出现在首层。
ANSYS seismic response spectrum method is used to study the seismic performance of RC frame structures before and after core drilling under the action of frequent earthquakes,fortification earthquakes and rare earthquakes.The results show that when the core sampling number of the first,second and third layers is 5,6 and 6 respectively,the displacement change of the first layer is the largest.Under the action of frequent earthquakes,the displacement response of the RC frame structure after core drilling changes the most,the maximum deviation being 6.41%.Under the action of fortification and rare earthquakes,the displacement responses of the RC frame structure after core drilling are similar to each other,both smaller than that under the action of frequent earthquakes.The damage analysis results show that there is no obvious stress concentration damage in the cores on the frame beam members.The frame column members where obvious stress concentration in the cores emerges are all in the first layer.
作者
刘芳
杨聪昆
周宏宇
LIU Fang;YANG Congkun;ZHOU Hongyu(Beijing Tongren Hospital,CMU,Beijing 100005;Testing Center Co.,Ltd.,Beijing 100013,China;College of Architectural Engineering,Beijing University of Technology,Beijing 100124,China)
出处
《西安工业大学学报》
2024年第6期733-742,共10页
Journal of Xi’an Technological University
基金
国家自然科学基金项目(51978012)。
关键词
钻芯
抗震性能
反应谱法
位移反应
损伤
drilled core
seismic performance
response spectrum method
displacement response
damage
