高强钢筋高强混凝土框架梁柱节点抗震性能试验研究  

An Experimental Study on Seismic Behaviors of HRC Frame Joints Reinforced with High-strength Rebars

作　　者：阎石[1] 郑文泉[1] 张曰果[1] 

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2006年第2期199-203,共5页Journal of Shenyang Jianzhu University：Natural Science

基　　金：辽宁省教育厅基金项目(2004D246);沈阳市科学技术计划项目(1032045-3-01)

摘　　要：目的研究通过在高强混凝土框架梁柱节点中配置高强度钢筋来提高其抗震能力.方法通过6个缩尺模型的框架节点在低周反复荷载下的试验,研究混凝土强度等级、轴压比、配箍率及箍筋强度等因素对高强混凝土框架节点抗震性能的影响,重点研究了高强箍筋的抗剪作用.结果明确了配有高强度钢筋的高强混土框架节点的破坏机理.试验表明混凝土强度、节点核芯区配箍率、轴压比等因素对节点抗震性能有重要的影响.结论在框架梁柱节点内配置一定数量的高强钢筋不仅可以提高节点的承载力,而且可以明显改善节点的延性性能:框架梁柱节点在反复荷载下的位移延性比超过3.0,实测功比指数最小值为27.24,说明配置高强钢筋的框架梁柱节点破坏时具有良好的吸收和耗散地震能量的能力,能够满足结构抗震要求.The purposes of this paper is to focus on increasing the seismic capacity of RC frame joints by reinforcing it with high-strength transverse rebars in the joints. By the experimental method, 6 half-size specimen were tested under the low cycles loading in structural lab in order to analysis both the capacity and ductility of the joints factored by strength degree of concrete, ratio of axial compression, and amount and strength of stirrups. The shear function of high-strength rebar is mainly studied experimentally. The results show that these kinds of joints can be divided into three stages of development under low cyclic loading, stage of elastic, stage of being cracks, and stage of failure as well. It also shows that the strength of concrete, ratio of stirrup in core zone, and ration of axial compression have importantly affected the seismic behaviors of joints. The conclusions can be made that the high-strength rebar can increase effectively the seismic capacity and ductility for the joints.

关 键 词：高强钢筋 高强混凝土节点 抗震性能 低周往复加载 

分 类 号：TU352.1[建筑科学—结构工程]