Seismic Behavior of Composite Concrete Filled Steel Tube Column-Wide Flange Beam Moment Connections
Seismic Behavior of Composite Concrete Filled Steel Tube Column-Wide Flange Beam Moment Connections
复制标题
DOI：
10.1061/(asce)0733-9445(2004)130:2(223
复制
发表时间：
2004-02
期刊：
影响因子：
--
通讯作者：
J. Ricles;S. Peng;Le-wu Lu
中科院分区：
文献类型：
--
作者：
J. Ricles;S. Peng;Le-wu Lu
在模拟地震荷载条件下，对10个全尺寸抗弯连接进行了试验研究。每个测试样本模拟的内部节点的抗弯框架组成的方钢管混凝土柱和宽翼缘钢梁，能量耗散的设计主要发生在梁或在连接面板区在严重的地震。研究结果表明，抗弯矩连接细节可以经济地设计，使超过0.045拉德的非弹性层间位移循环荷载下发展。这些详图包括不带抗剪翼片的T形开口连接、薄弱板区域连接和延伸T形连接。面板区剪切屈服和局部屈曲被证明是一种延性模式的响应，与最小的强度恶化发生在连接。在柱中使用内隔板会局部破坏接头，但也会导致梁翼缘在其焊接通道孔处的应变集中和断裂。此外，应变集中发展在连接细节，缺乏一个逐渐过渡的几何形状，并导致连接延性降低。
The results of an experimental research study involving the testing of ten full-scale moment resisting connections under simulated seismic loading conditions are presented. Each test specimen modeled the interior joint of a moment resisting frame consisting of square concrete filled steel tube columns and wide flange steel girders, where energy dissipation was designed to occur either primarily in the beams or in the connection panel zone during a severe earthquake. The results of the study indicate that moment resisting connection details can be economically designed that enable more than 0.045 rad of inelastic story drift to develop under cyclic loading. These details include split-tee connections without a shear tab, weak panel zone connections, and extended tee connections. Panel zone shear yielding and local buckling are shown to be a ductile mode of response, with minimal strength deterioration occurring in the connection. The use of interior diaphragms in the column is shown to locally stiffen the joint, but also lead to strain concentrations and fracture of the beam flanges at their weld access holes. Furthermore, strain concentrations develop at connection details that lack a gradual transition in geometry and result in a reduction in connection ductility.