中文摘要：

为研究新型钢板组合PEC柱-钢梁节点连接的抗震性能,以采用预拉对穿螺栓的新型PEC柱-钢梁T形件焊接连接中节点试验试件为研究对象,考虑轴压力、PEC柱截面形式与钢板组合截面布置方式等设计参数,利用有限元软件ABAQUS建立4个中节点有限元模型并对其滞回性能进行模拟.研究结果显示：柱轴压力提高了节点连接的初始抗弯刚度,而二阶效应降低了其抗弯能力;采取钢结构翼缘卷边增强了混凝土的约束作用,更好地满足＂强柱弱梁＂的抗震要求;钢板组合截面布置是决定梁柱连接刚度合理匹配的关键;预拉对穿螺栓表现出部分自复位功效,且较好地实现了混凝土斜压带传力模式,相应降低了节点域腹板的抗剪要求;所有试件破坏模式均因T形件的加强使得梁上塑性铰出现位置向T形件腹板尾部附近梁截面转移,且所有试件达到破坏时节点转角均超过0.02弧度,表明该节点连接能较好地满足抗震对节点转动能力的需求.

英文摘要：

In order to investigate seismic performance of interior joint between innovative PEC columnsteel beam,the test specimens of PEC columns fabricated with thin-walled built-up section and steel beams interior joint with welded split-tee and pretensioned through-out high strength bolted connections were taken as investigation object and some design parameters such as the axial compression,cross-section configuration of PEC column,and layout mode of steel plate built-up section were taken into account,4 analyzing models were built to simulate its hysteretic behavior by using software ABAQUS.The results showed that axial compression would improve initial flexural stiffness of joint but decrease its strength due to the second-order effect;flange crimping strongly confine filled concrete to meet the seismic design principle of＂strong column weak beam＂;PEC column layout would be the key factor for rational stiffness matching between column and beam;through-out bolts exhibited partial self-centering functions and effectively realized the concrete equivalent strut in the panel zone;the failure mode primarily induced by plastic hinge formed in the steel beam section near the end of split-tee web because of its strengthening,and the joint rotation angle at failure all surpassed 0.02 rad to verify its soundly rotational capacity for seismicity.