摘要
采用有限元分析软件ABAQUS对型钢混凝土(SRC)梁柱平面节点试件的力学性能进行数值模拟,将模拟与试验结果对比,发现两者吻合较好,验证了模型的有效性.在此基础上,建立与平面节点对应的空间中节点有限元模型,研究SRC空间中节点在不同加载路径下的滞回性能、骨架曲线和延性性能,并进一步分析了楼板宽度、节点类型和轴压比等因素对中节点力学性能的影响.结果表明:与平面加载路径相比,空间加载使节点核心区产生双向耦合效应,从而降低了试件的承载能力;SRC空间中节点发生剪切破坏时,楼板宽度对其承载能力和变形能力影响较小;与中节点和边节点相比,空间角节点的极限荷载和位移均降低较多;随着轴压比增大,空间中节点变形能力有所降低.
The mechanical behavior of steel reinforced concrete （SRC） beam-column plane joints was simulated based on the finite element software ABAQUS, and the calculation was compared with test results. The agreement between calculation and test results shows that the simulation model is effective. Based on this, the corresponding finite element model of spacial interior joints were established to study the influence of different loading paths to hysteretic performance, skeleton curves and ductility. In addition, the effect of slab width, node type and axial compression radio on mechanical property of specimens were analyzed. The research shows the carrying capacity of joints decreases due to a bidirectional coupling effect in the joints which space loading paths lead to. When shear failure was occurred for SRC spacial interior joints, the slab width has smaller impact to carrying capacity and deformability. Compared with spacial interior and edge joints, the ultimate load and displacement of spacial comer joints decrease greater. What＇s more, the deformability of spacial interior joints reduces the increasing of axial compression ratio.
作者
王秋维
张月坤
张海镇
WANG Qiuwei ZHANG Yuekun ZHANG Haizhen(School of Civil Engineering, Xi＇an Univ. of Arch. ＆ Tech., Xi＇an 710055, China)
出处
《西安建筑科技大学学报（自然科学版）》
CSCD
北大核心
2016年第6期853-861,共9页
Journal of Xi'an University of Architecture & Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(51478382)
关键词
型钢混凝土
空间中节点
加载路径
有限元分析
力学性能
steel reinforced concrete
spacial interior joints
loading paths
finite element analysis
mechanical property
