斜交网格X型节点轴向往复荷载作用下的性能研究

发布时间：2018-04-13 11:09

本文选题：斜交网格结构 + X型节点　；参考：《工程力学》2017年08期

【摘要】：以斜交网格X型节点为原型,采用ABAQUS数值分析软件建立模型,对其进行轴向拉压往复荷载作用下的非线性分析。分析了在加载过程中节点的钢部件和混凝土的应力分布情况,并研究了节点的荷载-位移滞回特性及刚度退化。同时,以节点相贯角度、竖向连接板厚度、衬板厚度、钢管宽厚比、加强环厚度、混凝土强度等级为控制参数,分析其对X型节点轴向性能的影响。研究表明:采用竖向连接板、衬板和加强环可以改善节点区混凝土的约束效果,节点滞回曲线饱满,初始刚度较大,且刚度退化较慢,表现出良好的抗震性能。竖向连接板厚度、钢管宽厚比和混凝土强度等级对节点极限承载力、滞回性能以及刚度退化影响较大,而节点相贯角度、衬板和加强环厚度对节点极限承载力、滞回性能以及刚度退化影响较小。
[Abstract]:Based on the prototype of skew mesh X node, the model was established by using ABAQUS numerical analysis software, and the nonlinear analysis was carried out under axial tension and compression reciprocating loads.The stress distribution of steel and concrete joints during loading is analyzed, and the load-displacement hysteretic characteristics and stiffness degradation of joints are studied.At the same time, the influence of joint intersecting angle, thickness of vertical connection plate, thickness of lining plate, ratio of steel pipe width to thickness, strengthening ring thickness and strength grade of concrete on axial performance of X type joint is analyzed.The results show that the joint hysteretic curve is full, the initial stiffness is large, and the stiffness degradation is slow, which can improve the restraint effect of concrete in the joint zone by using vertical connecting plate, lining plate and strengthening ring.The thickness of vertical connection plate, the ratio of width to thickness of steel tube and the strength grade of concrete have great influence on ultimate bearing capacity, hysteretic performance and stiffness degradation of joints, while the intersecting angle of joints, the thickness of lining plate and strengthening ring have great influence on ultimate bearing capacity of joints.Hysteretic performance and stiffness degradation have little effect.
【作者单位】：西安建筑科技大学土木工程学院;
【基金】：国家自然科学基金项目(51478382,51608434) 陕西省自然科学基础研究基金项目(2016JQ5082) 人才科技基金项目(RC1607)
【分类号】：TU973.1

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