内加劲肋对大尺寸KT型相贯节点抗震性能影响的数值模拟分析

相贯节点是钢管结构常用的节点形式,为评价不同加劲方式对大尺寸KT型相贯节点抗震性能的影响,使用有限元软件Ansys建立实体单元模型,分别对不设内部加劲肋、设置两个内部加劲肋、设置四个内部加劲肋情况下的相贯方钢管节点的滞回性能进行了有限元数值模拟分析,得到其在低周往复荷载作用下的滞回曲线及骨架曲线.通过比较各曲线异同,得出在竖腹杆下端设置加劲肋,节点的抗震性能最好.

Numerical Analysis on Seismic Performance of KT Joint with Different Internal Stiffeners

Tubular joint is a regular type of steel pipe structure .In order to evaluate the influence of seis-mic performance for KT joint with different internal stiffeners , the finite element software Ansys was used to build solid model and numerically analyze the hysteretic behavior .Without stiffeners , with two stiffeners and with four stiffeners were considered respectively , and hysteretic curve and skeleton curve under the low cyclic load were derived .Through comparing different curves , two stiffeners under the vertical member was advised .