成型格网箍筋混凝土柱受力及抗震性能试验研究  

Experimental study on force condition and seismic behavior of concrete columns confined with welded reinforcement grids and multi-layer longitudinal rebar

作　　者：刘付钧 黄忠海 樊健生[4] 李盛勇 陈元龙 LIUFU Jun;HUANG Zhonghai;FAN Jiansheng;LI Shengyong;CHEN yuanlong(Earthquake Engineering Research&Test Center,Guangzhou University,Guangzhou 510006,China;RBS Architectural Engineering Design Associates,Guangzhou 510170,China;RBS Partners S&T Co.,Ltd,Guangzhou 510170,China;Department of Civil Engineering,Tsinghua University,Beijing 100084,China;China Southwest Architecture,Chengdu 610041,China)

机构地区：[1]广州大学工程抗震研究中心,广东广州510006 [2]广州容柏生建筑结构设计事务所,广东广州510170 [3]广州容联建筑科技有限公司,广东广州510170 [4]清华大学土木工程系,北京100084 [5]中国建筑西南设计研究院有限公司,四川成都610041

出　　处：《建筑结构学报》2024年第5期145-154,共10页Journal of Building Structures

基　　金：广州市创新创业领军团队项目(CYLJTD-201608);广州市科技计划项目(201906010012)。

摘　　要：为研究成型格网箍筋混凝土柱和成型格网箍筋多重配筋混凝土柱的受力及抗震性能,分别对采用传统绑扎箍筋和成型格网箍筋的6个混凝土柱和10个成型格网箍筋多重配筋混凝土柱进行了轴压试验和低周往复加载试验研究,对比分析采用成型格网箍筋和传统绑扎箍筋的混凝土柱的受力性能,研究在核心格网区域设置不同配筋率纵筋和纵筋布置方式等对成型格网箍筋多重配筋混凝土柱的受力性能影响。研究结果表明:采用成型格网箍筋代替传统绑扎箍筋,钢筋混凝土柱的受力机理基本一致,成型格网箍筋能达到屈服应变,箍筋性能得到充分发挥,成型格网箍筋混凝土柱的轴压承载力和抗震性能更优;成型格网箍筋可为核心格网区域布置的纵筋提供有效支撑,纵筋的受压强度得到充分利用,延性可达到规范要求。在试验研究基础上,提出了成型格网箍筋多重配筋混凝土柱轴压比计算公式和轴压比限值建议。从公式计算结果与试验结果对比可知,成型格网箍筋多重配筋柱的实测轴压承载力高于公式计算结果,柱轴压比计算时,可计入核心格网区域配置的纵筋轴压承载力贡献。In order to study the seismic behavior of welded reinforcement grids(WRG)columns and WRG columns with multi-layer longitudinal rebar,six normal WRG columns and ten WRG columns with multi-layer longitudinal rebar are tested under vertical compression and cyclic lateral load respectively.This experiment shows the impact of the amount and distribution of inner longitudinal rebar on the columns’capacity and seismic behavior by comparing different columns.Test results indicate that the mechanism of WRG columns is identical to columns confined with conventional stirrups.WRG can reach the yield strain point and it takes full advantage of strength of stirrups.WRG column performs better under axial force and possesses better seismic behavior.WRG can support inner longitudinal rebar effectively and make full use of rebar compressive strength,so it can satisfy the requirement of seismic ductility.Based on experimental study,the calculation method of axial load ratio for WRG columns and suggested ratio limit are proposed.Axial compressive capacity of WRG column with multi-layer longitudinal rebar is higher than the value generated by the formula.The contribution of longitudinal rebar confined by inner grids to the compressive capacity of column can be taken into consideration in the calculation of axial load ratio.

关 键 词：成型格网箍筋 混凝土柱 多重配筋 轴压试验 拟静力试验 轴压性能 抗震性能 

分 类 号：TU375[建筑科学—结构工程]