钢管混凝土叠合柱-钢筋混凝土梁节点抗震性能试验——以地铁车站为例  

Experimental Study on Seismic Performance of CFST Composite Columns-Reinforced Concrete Beam Joints:A Case Study of Subway Station

作　　者：侯勉望[1,2] HOU Mianwang(China Railway First Survey and Design Institute Group Co.Ltd.,Xi’an 710043,China;Shaanxi Railway and Underground Traffic Engineering Key Laboratory,Xi’an 710043,China)

机构地区：[1]中铁第一勘察设计院集团有限公司,西安710043 [2]陕西省铁道及地下交通工程重点实验室,西安710043

出　　处：《华北地震科学》2024年第4期26-34,共9页North China Earthquake Sciences

基　　金：中铁第一勘察设计院集团有限公司科研项目(院科20-57)。

摘　　要：为研究钢管混凝土叠合柱-钢筋混凝土梁节点抗震性能,基于柱截面抗弯刚度等效原则分别设计制作了钢管混凝土柱-钢筋混凝土梁节点试件和钢管混凝土叠合柱-钢筋混凝土梁节点试件,并对其进行低周往复加载试验,对比分析两个试件的破坏模态、荷载-位移曲线、刚度退化、耗能能力、承载力及延性等抗震性能指标。结果表明:两种节点主体破坏模式均是梁部塑性铰区域的弯曲破坏,破坏现象主要表现为混凝土的压碎起皮与脱落、钢筋的屈曲变形等,叠合柱节点的极限荷载与极限位移均略低于钢管柱节点;两个节点的等效黏滞阻尼系数分别为0.18、0.25,延性系数分别为4.61、6.20,表明叠合柱节点特殊的构造优势减少了梁部截断钢筋的数量,在提高施工效率与连接可靠性的前提下,相较于钢管柱增强了节点的耗能能力与延性。To study the seismic performance of CFST composite column-reinforced concrete beam joints,this paper designs and fabricates test specimens of CFST column-reinforced concrete beam joints and CFST composite columnreinforced concrete beam joints based on the equivalent principle of column section bending stiffness.Low-cycle reciprocating loading tests are conducted on these specimens to compare and analyze seismic performance indicators,such as failure modes,load-displacement curves,stiffness degradation,energy dissipation capacity,load-bearing capacity,and ductility of the two types of specimens.The results show that the primary failure mode for both types of joints is bending failure in the plastic hinge region of the beam.The failure phenomena mainly involve concrete crushing,spalling,and steel reinforcement yielding.The ultimate load and displacement of the composite column joint are slightly lower than those of the steel tube column joint.The equivalent viscous damping coefficients of the two joints are 0.18 and 0.25,respectively,and the ductility coefficients are 4.61 and 6.20,indicating that the composite column joint,with its unique structural advantages,reduces the amount of beam shear reinforcement.Compared to the steel tube column joint,it enhances the energy dissipation capacity and ductility of the joint while improving construction efficiency and connection reliability.

关 键 词：钢管混凝土叠合柱 钢筋混凝土梁 梁柱节点 拟静力试验 抗震性能 

分 类 号：P315.92[天文地球—地震学]