中文摘要：

试验研究及理论分析表明，在低周往复荷载作用下，部分异形柱节点腹板部位破坏严重，限制了异形柱结构的楼层高度，成为异形柱结构的薄弱环节。通过节点核心区应用聚丙烯纤维增强的异形柱边节点和同条件下未增强的异形柱边节点的拟静力试验研究，对比了两个边节点的破坏特征、承载能力和延性、梁端弯矩一转角滞回曲线等抗震性能指标，研究了节点核心区箍筋应变变化规律，最后应用损伤模型对两个边节点进行了累积损伤分析。研究表明：聚丙烯纤维混凝土可以显著改善和提高异形柱边节点的破坏形态和开裂荷载，其他抗震性能指标也有所改善，从而可以避免异形柱节点成为薄弱部位。

英文摘要：

Experimental research and theoretic analysis show that the webs of some joints with specially shaped columns exhibit severe failure under low cyclic loading, so the joint with specially shaped columns become the weak part of structures with specially shape columns, and it restricts the storey height of this structure. Based on the low cyclic loading of a exterior joint with specially shaped columns reinforced by polypropylene fiber at the core of the joint and a joint with specially shaped columns not reinforced, it is compared the failure characteristic, the bearing capacity and ductility, the hysteresis curve of the moment-rotation at end of beams of the two specimens ; it is studied the change of the stirrup strain of the core of joints, and is also analyzed the cumulated damages with the damage estimating model. It is shown that fiber reinforced concrete could improve the failure characteristic and enhance the cracking load effectively of the joint with specially shaped columns, so the joint is never the weak part of structures with specially shape columns.