H型钢柱弱轴连接组合节点抗震性能试验研究

发布时间：2018-03-04 12:46

本文选题：钢框架　切入点：H型钢柱　出处：《建筑结构学报》2017年08期 　论文类型：期刊论文

【摘要】：为研究H型钢柱弱轴连接组合节点的抗震性能,采用柱顶加载模式完成了5个栓焊混合连接的不同构造形式的足尺十字形节点的循环加载试验,对各试件的试验现象、滞回曲线、延性、耗能及楼板滑移进行了分析。结果表明:焊接质量是避免节点脆性破坏的首要保证;各试件的层间位移角均达到了0.04 rad,其中有4个试件的梁端对应弯矩大于0.8Mp,满足美国AISC的要求;加腋型组合节点试件破坏形式为柱屈曲,滞回曲线饱满,其余各试件由于梁下翼缘焊缝不同程度的破坏,腹板连接螺栓出现滑移,滞回曲线呈现反S形,但梁上翼缘焊缝均保持完好,故负弯矩作用下的延性优于正弯矩作用下的;各试件能量耗散系数随着位移的增加而逐渐增大;当抗剪连接度达到50%时,在整个加载过程中栓钉均保持完好,且楼板与钢梁的相对滑移基本不足1 mm,可忽略不计,说明采用部分抗剪连接对所给出的节点形式具有可行性。
[Abstract]:In order to study the seismic behavior of composite joints with weak shaft connections of H-shaped steel columns, the cyclic loading tests of five full-scale cross-shaped joints with different structures of bolted and welded hybrid connections were completed by using the column top loading mode. The experimental phenomena of each specimen were investigated. Hysteretic curves, ductility, energy dissipation and floor slippage are analyzed. The results show that welding quality is the primary guarantee to avoid brittle failure of joints. The interlayer displacement angle of each specimen reached 0.04 rad. among them, the corresponding moment of beam end of four specimens was greater than 0.8 MPA, which met the requirements of American AISC, and the failure mode of the specimen with axillary joint was column buckling with full hysteretic curve. The other specimens show slippage of web joint bolts and inverse S shape of hysteretic curve due to the failure of the weld of the lower flange of the beam, but the weld of the upper flange of the beam remains intact, so the ductility under the negative moment is better than that under the positive moment. The energy dissipation coefficient of each specimen increases gradually with the increase of displacement, when the shear connection degree reaches 50, the pin remains intact during the whole loading process, and the relative slip between floor slab and steel beam is less than 1 mm, which is negligible. It is shown that it is feasible to use partial shear connection for the given joint form.
【作者单位】：长安大学建筑工程学院;
【分类号】：TU352.11;TU392.1

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