高强箍筋RC梁-柱节点抗剪模型及非线性分析  

SHEAR MODEL AND NOLINEAR ANALYSIS OF RC BEAM-COLUMN JOINT WITH HIGH-STRENGTH STIRRUPS

作　　者：王南[1] 史庆轩[2] 

机构地区：[1]临沂大学建筑学院,山东临沂276000 [2]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《工程力学》2017年第7期89-96,共8页Engineering Mechanics

基　　金：国家自然科学基金项目(51478382;50978215);临沂大学引进人才科研启动基金项目(LYDX2016BS049)

摘　　要：在现有RC梁柱节点抗剪模型的基础上,提出了高强箍筋RC梁柱节点抗剪模型。该模型考虑了节点中混凝土的斜压杆传力机制和箍筋的抗剪作用。计算结果表明:通过建议的节点抗剪模型计算的高强箍筋RC梁柱节点的剪切应力-应变曲线与试验结果符合较好,节点最大剪应力计算值与试验值之比的平均值接近于1且变异系数较小。将该节点抗剪模型应用于OpenSees程序中分析了高强箍筋RC梁柱节点在往复荷载作用下的力学行为,讨论了混凝土强度和轴压比对高强箍筋RC梁柱节点受力性能的影响。该模型可用于高强箍筋RC梁柱节点的受力分析。Based on an existing RC beam-column joint shear model, a new shear model for RC beam-column joint with high-strength stirrups was proposed, which considers the strut mechanism of concrete and shear mechanism of stirrups of RC beam-column joint. The calculated results indicate that the shear stress-strain curves calculated by the proposed model agrees well with the test curves. The average value of the ratios of calculated results and test results of the maximum shear stress is closed to 1, and the corresponding coefficient of variation is smaller. The beam-column joint shear model was applied in OpenSEES platform to analyze the mechanic behavior of RC joint with high-strength stirrups. The effect of concrete strength and axial compressive ratio on the performance of RC beam-column joint was discussed. The model is feasible for the mechanical analysis of RC beam-column joint with high-strength stirrups.

关 键 词：结构工程 钢筋混凝土节点 高强箍筋 抗剪模型 数值模拟 

分 类 号：TU375[建筑科学—结构工程]