摘要
该文提出了一种带可更换脚部件的装配式RC剪力墙,通过数值模拟分析了可更换脚部件承载力、可更换脚部件高度以及非更换区域内嵌加强钢板厚度对这种剪力墙抗震性能的影响,并与现浇RC墙进行了对比。结果表明:随着可更换脚部件承载力提高,装配式RC墙承载力越高;当可更换脚部件与现浇RC墙边缘构件的抗压承载力比nc=0.85或抗拉承载力之比nt=1.35时,带可更换脚部件装配式RC墙与现浇RC墙承载力、刚度和滞回特征基本接近。可更换脚部件高度对装配式RC墙压弯承载力、刚度和滞回特征影响不大。当可更换脚部件高度为墙截面高度的1/2时,墙体损伤主要集中在可更换区域,非更换区域损伤较小,实现了损伤可控。对于弯曲破坏控制的带可更换脚部件的装配式RC墙,非更换区域的加强钢板厚度对墙体抗震性能影响不大。为实现带可更换脚部件装配式RC墙与现浇RC墙性能等同,建议非更换区域按照装配式RC墙底截面与现浇RC墙底截面抗剪承载力相等原则设计。
A new type of precast RC shear wall with replaceable corner components was proposed and the influence of different parameters on the compressive-flexural behavior were studied based on numerical analysis.These parameters include the strength and height of replaceable corner components,and the thickness of embedded steel plate in non-replaceable zone.The results indicated that the lateral strength of the precast RC shear wall increased as the increase of strength of replaceable corner components.The precast RC shear wall had approximately identical lateral strength with cast-in-situ RC shear wall when the ratio of compressive strength of replaceable corner components to the boundary element of cast-in-situ RC shear wall is 0.85 or the ratio of tensile strength of replaceable corner components to the boundary element of cast-in-situ RC shear wall is 1.35.The height of replaceable corner components had a limited influence on the compressive-flexural lateral strength,on the stiffness and hysteretic behavior of precast RC shear wall;and one-half of sectional height was recommended for the height of replaceable corner comments.The thickness of embedded steel plate in non-replaceable zone also had a limited influence on the compressive-flexural behavior of precast RC shear wall,thus the principle of equal shear resistance between cast-in-situ RC shear wall and precast RC shear wall was recommended to ensure the damage focused on the replaceable zones.
作者
董晓微
程小卫
李易
杜修力
DONG Xiao-wei;CHENG Xiao-wei;LI Yi;DU Xiu-li(Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education,Beijing University of Technology,Beijing 100124,China)
出处
《工程力学》
EI
CSCD
北大核心
2023年第S01期81-91,共11页
Engineering Mechanics
基金
国家自然科学基金项目(52108429)
北京市科技新星计划项目(Z211100002121097)
北京市教育委员会科技计划项目(KM202210005018)。
关键词
可更换脚部件
装配式RC墙
现浇RC墙
数值模拟
承载力
破坏模式
replaceable corner components
precast RC shear wall
cast-in-situ RC shear wall
numerical simulation
strength capacity
failure modes
