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为了研究薄壁钢板组合截面PEC柱(强轴)在恒定竖向荷载下的抗震性能,通过了解国内外在PEC组合柱研究领域的现状,对3个变化混凝土强度的薄壁钢板组合PEC柱足尺试件进行了恒定轴压下水平循环荷载试验。观测记录了各个试件受力阶段的外在混凝土裂缝与压溃和薄壁钢板组合截面翼缘钢板局部屈曲现象,得到了试件的荷载-位移滞回曲线。根据试验结果分析了试件的抗侧刚度、裂缝开展与破坏模式、试件的抗震延性与耗能等力学性能。结果表明:试验试件具有较高的承载能力和较好的延性与耗能性能;构件的破坏模式为薄壁钢板组合截面翼缘发生局部屈曲、柱脚混凝土压溃和拉结筋屈服甚至拉断。
In order to study the anti-seismic performance of PEC column (strong axis) with thin-walled steel plate under constant vertical load, by understanding the current situation of research on PEC column at home and abroad, three thin-walled steel plate combinations with varying concrete strength The test specimens were subjected to horizontal cyclic loading test under constant axial pressure. The local buckling phenomenon of external concrete cracks and collapsing and flange plate of steel plate with thin-walled steel plate was recorded and recorded. The load-displacement hysteresis curve of the specimen was obtained. According to the test results, the anti-side stiffness, crack initiation and failure modes, the anti-seismic ductility and energy dissipation of the specimens were analyzed. The results show that the test specimen has high load carrying capacity and good ductility and energy dissipation performance. The failure mode of the component is local buckling of the flange of the thin-walled steel plate, crushing of the concrete of the column foot and yielding of the pull- Off.