翼缘削弱型钢筋混凝土框架梁柱节点受力性能试验  

Experimental Research on Mechanical Behavior of Beam-Column Joints in Reinforced Concrete Frame with Weakened Flanges

作　　者：阎石[1] 李康宁[1] 张曰果[1] 郭志刚 尹钢 刘鹏禹 李生效[1] 无 

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168 [2]辽宁仁泰交通科技有限公司,辽宁沈阳110166 [3]营口经济技术开发区建询施工图审查中心,辽宁营口115007

出　　处：《沈阳建筑大学学报（自然科学版）》2015年第2期219-227,共9页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(51278313);营口经济技术开发区建询施工图审查中心项目

摘　　要：目的试验研究翼缘削弱型钢筋混凝土框架梁柱节点的受力性能,考查翼缘削弱程度以及削弱方式对其受力性能影响.方法在钢筋混凝土梁端翼缘内预埋刚度调节盒,使得梁端塑性铰外移,通过制造6个翼缘削弱型钢筋混凝土框架梁柱节点模型试件,并对试件进行拟静力试验,研究该类型节点的破坏机理;通过改变梁端翼缘内预埋刚度调节盒的数量和方式等参数,考察该类型节点破坏的主要影响因素.结果梁翼缘预埋刚度调节盒对框架梁刚度的调节明显;梁端塑性铰出现在刚度调节盒所处位置,可实现塑性铰外移;试验测得节点的位移延性系数均不小于5.3,抗震性能较好.结论翼缘削弱型钢筋混凝土框架梁柱节点可明显改善普通梁柱节点的抗震性能,通过在梁柱节点翼缘处设置适当数量的刚度调节盒,可更易实现"强柱弱梁"的抗震设防目标.The influence of weakened flange on mechanical behavior of beam-column joints in reinforced concrete （ RC ） frame with weakened flanges （ WFJ ） was experimentally studied. Embedding stiffness adjustment boxes on the flange of RC beam end, which can make plastic hinges atthe beam end move outward, six WFJ specimens of RC frame beam-column joint models were pre- pared and static tests were carried out to study the joint failure mechanism. By changing the quantity and manner parameters of stiffness adjustment boxes on the end flange of RC beam, the main in- fluence factors on joint failure were obtained. It is found that the stiffness of frame beam can be adjusted by stiffness adjustment boxes easily. The beam end plastic hinges occur at locations of stiffness adjustment boxes, which are moved outward. The displacement ductility coefficients of joints are not less than 5.3, which means the seismic performance is perfect. Conclusion is that the beam-column WFJ in RC frame can significantly improve the seismic performance. Setting appropriate number of stiffness adjustment boxes on the flange of beam-column joints, the seismic fortification goal of ＂strong column and weak beam ＂ can be implemented.

关 键 词：钢筋混凝土框架 翼缘削弱型梁柱节点 刚度调节盒 拟静力试验 强柱弱梁 

分 类 号：TU375.4[建筑科学—结构工程]