沙漠砂混凝土空间边节点抗震性能有限元分析  

Finite element analysis of seismic performance of desert sand concrete space side joints

作　　者：高翔 李志强[1,2] 周阳 张俊龙[1] GAO Xiang;LI Zhiqiang;ZHOU Yang;ZHANG Junlong(College of Water Conservancy and Construction Engineering,Shihezi University,Shihezi 832003,China;Laboratory of Seismic and Energy-saving Technology for Buildings in High-Intensity Cold Zone,Xinjiang Corps,Shihezi 832003,China)

机构地区：[1]石河子大学水利建筑工程学院,新疆石河子832003 [2]新疆兵团高烈度寒区建筑抗震节能技术工程实验室,新疆石河子832003

出　　处：《混凝土》2023年第5期32-38,共7页Concrete

基　　金：国家自然科学基金(51668053);兵团科技创新人才计划项目(2021CB043);石河子大学国际科技合作推进计划(GJHZ202005)。

摘　　要：为了研究沙漠砂混凝土空间边节点的抗震性能,利用ABAQUS有限元软件建立7个空间边节点和1个平面边节点模型,通过破坏现象、滞回曲线、骨架曲线和延性性能等,分析材料类型、节点形式、轴压比和配筋率对节点抗震性能的影响。结果表明:等效塑性应变最大值位置出现在梁柱交接处的柱子侧面和梁侧面,此处混凝土最容易脱落,钢筋最容易发生断裂。沙漠砂混凝土空间边节点比普通砂混凝土空间边节点的初始刚度和延性分别大约15%和18%,可以作为普通砂混凝土的替代材料。空间节点比平面节点的屈服荷载和极限荷载分别小约3%和2%,但延性系数比平面节点大约16%。轴压比从0增加到0.6时,空间节点的初始刚度和耗能分别增大约42%和12%,但延性降低约2.41%。配筋率从1.54%增加到3.08%时,试件的极限承载力、初始刚度和延性分别增大约15%、20%、29%,但建议节点设计时柱子纵筋不仅要满足承载力,且应对称与均匀配筋。In order to get the seismic behavior of the desert sand concrete space boundary nodes,using ABAQUS finite element software to establish seven space and one flat side edge node model,through the failure phenomenon,hysteresis curves,skeleton curves,and ductility performance,such as analysis of node failure mechanism under the action of the reciprocating force,ductility performance and material type,the node form,axial compression ratio and the influence of reinforcement ratio on seismic performance of the node.The results show that the maximum equivalent plastic strain occurs at the side of the column and the side of the beam,where the concrete is most likely to fall off,and the steel bar is most likely to break.The initial stiffness and ductility of desert sand concrete space side joints are about 15%and 18%,respectively,compared with ordinary sand concrete space side joints,which can be used as a substitute material for ordinary sand concrete.The yield load and ultimate load of the space node are about 3%and 2%smaller than that of the plane node,respectively,but the ductility coefficient is about 16%.When the axial compression ratio increases from 0 to 0.6,the initial stiffness and energy consumption of space nodes increase by about 42%and 12%,respectively,but the ductility decreases by about 2.41%.When the reinforcement ratio increased from 1.54%to 3.08%,the ultimate bearing capacity,initial stiffness,and ductility of the specimens increased by about 15%,20%,and 29%,respectively.However,it is suggested that the longitudinal reinforcement of the column should meet the bearing capacity and be symmetric and uniform.

关 键 词：沙漠砂混凝土 空间边节点 轴压比 配筋率 抗震性能 

分 类 号：TU528.01[建筑科学—建筑技术科学]