摘要
基于延性节点理念,提出一种采用低屈服点高延性连杆连接与钢牛腿搭接的预制混凝土梁柱延性节点,并通过拟静力往复荷载试验评估其抗震性能.设计制作了3个足尺试件,包括2个采用不同延性连杆构造的新型预制延性试件和1个现浇对比试件.通过对比3个试件的破坏形态、滞回性能及承载力等受力性能指标发现:新型预制延性节点较现浇节点屈服位移提高约43%,峰值荷载提高约14%,延性及承载能力均有所提高;其中节点核心区内预埋整体式延性杆锚块的节点,整体协调变形能力更优,位移延性及承载性能更佳.
Based on the concept of ductile joints,a prefabricated concrete beam-column ductile joint is proposed,in which low-yield-point and high ductility rods and steel brackets are used for linkage.A quasi-static cyclic loading test was carried out to evaluate the seismic response of the new prefabricated ductile joint.Three fullscale specimens were designed and manufactured,including two new prefabricated ductile specimens with different forms of ductile linkage and one cast-in-place connection specimen for comparison.The failure modes,hysteretic performance and bearing capacity of the three specimens were compared and analyzed.The new prefabricated ductile joint had about 43%higher yield displacement and about 14%higher peak load than those of the cast-in-place comparison joint,and both ductility and bearing capacity were improved.Moreover,as an integral ductile rod anchor block was embedded in the core area of the joint,the joint showed better overall compatible deformation ability,higher displacement ductility and bearing capacity.
作者
罗晓群
贾硕
卢家森
张其林
LUO Xiaoqun;JIA Shuo;LU Jiasen;ZHANG Qilin(College of Civil Engineering,Tongji University,Shanghai 200092,China;Shanghai Urban Construction Design&Research Institute(Group)Co.,Ltd.,Shanghai 200125,China)
出处
《湖南大学学报(自然科学版)》
北大核心
2025年第11期30-41,共12页
Journal of Hunan University:Natural Sciences
基金
上海市科委2022年度“科技创新行动计划”社会发展科技攻关项目(22dz1201600)。
关键词
预制混凝土
梁柱节点
延性连接
拟静力试验
抗震响应
位移延性
prefabricated concrete
beam-column joint
ductile connection
quasi-static test
seismic response
displacement ductility
