Effects of Axial Compression Load and Eccentricity on Seismic Behavior of Nonseismically Detailed Interior Beam-Wide Column Joints
Effects of Axial Compression Load and Eccentricity on Seismic Behavior of Nonseismically Detailed Interior Beam-Wide Column Joints
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DOI：
10.1061/(asce)0733-9445(2009)135:7(774
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发表时间：
2009-07
期刊：
影响因子：
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通讯作者：
Bing Li;T. Pan;Cao Thanh Ngoc Tran
中科院分区：
文献类型：
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作者：
Bing Li;T. Pan;Cao Thanh Ngoc Tran
对六个全尺寸抗震详细钢筋混凝土内部梁宽柱接头进行了测试，以研究接头的抗震性能。应用了从零到高强度的轴向压缩载荷以及模拟地震作用的准静态循环载荷。每个测试组件的整体性能均在横向负载能力、漂移、刚度、能量耗散能力和接头剪切强度方面进行了检查。研究了三个水平的轴向压缩柱载荷，以确定该变量如何影响接头的性能。测试还探讨了中心线偏心对地震荷载作用下的内部梁宽柱节点性能的影响。所有试件均在接缝处失效，强度逐渐下降，结构刚度较低，粘结力下降。刚度和强度的低水平归因于通过接头芯的纵向钢筋的粘合恶化。结论是，具有抗震设计和细节的特殊钢筋混凝土内部梁宽柱接头可以具有固有的延展性，足以应对意外的中度地震。
Six full-scale nonseismically detailed reinforced concrete interior beam-wide column joints were tested to investigate the seismic behavior of the joints. Axial compression loads varying from zero to high magnitude, as well as quasi-static cyclic loading simulating earthquake actions were applied. The overall performance of each test assembly was examined in terms of lateral load capacity, drift, stiffness, energy dissipation capacity, and joint shear strength. Three levels of axial compressive column load were investigated to determine how this variable might influence the performance of the joint. The tests also explored the effects of centerline eccentricity on the performance of interior beam-wide column joints subjected to earthquake loading. All the specimens failed at the joint panel with gradual strength deterioration, low attainment of structural stiffness, and bond degradation. The low attainment of stiffness and strength was attributed to the bond deterioration of the longitudinal bars through the joint core. It is concluded that special reinforced concrete interior beam-wide column joints with nonseismic design and detailing, could possess the inherent ductility for an adequate response to unexpected moderate earthquakes.