基于ADINACSRC节点抗震性能有限元模拟.pdfVIP

第 28 卷第 8 期 Vol.28 No.8 工 程 力 学 2011 年 8 月 Aug. 2011 ENGINEERING MECHANICS 99 文章编号：1000-4750(2011)08-0099-07 基于 ADINA 的 CSRC 节点抗震性能有限元模拟 *刘 阳，郭子雄 (华侨大学土木工程学院，福建，泉州 362021) 摘 要：进行了3 个核心型钢混凝土(CSRC)节点在低周反复荷载作用下的抗震性能试验，研究了核心型钢在节点 区的截断锚固形式对试件抗震性能的影响。详细介绍了采用大型通用有限元软件 ADINA 对 CSRC 节点试件进行 非线性有限元模拟的关键技术，通过该文完成的 3 个试件对程序进行验证。计算结果表明，该文使用的有限元模 型可以合理的反应 CSRC 节点的受力特征，计算所得的材料应力状态、混凝土裂缝发展趋势和试件骨架曲线等结 果与试验吻合良好。在此基础上分析了核心型钢在节点区的锚固构造、混凝土强度和强节点系数等参数对 CSRC 节点性能的影响。参数分析表明：强节点系数降低，试件强度增加，但变形能力减小。核心型钢在节点区的锚固 面积增加，试件强度和变形能力增加。该文成果可为 CSRC 结构的工程实践提供参考。 关键词：核心型钢混凝土节点；试验研究；ADINA ；有限元分析；节点构造 中图分类号：TU398 文献标志码：A FEM ANALYSIS OF THE SEISMIC BEHAVIOR OF CSRC JOINTS WITH ADINA * LIU Yang , GUO Zi-xiong (College of Civil Engineering, Huaqiao University, Quanzhou, Fujian 362021, China) Abstract: Three core steel reinforced concrete (CSRC) joints were tested under cyclic loading to investigate the effect of truncation and embedded details of core steel in joint core to the seismic performance of the specimens. The FEM method used in this paper to simulate the CSRC joints with ADINA was introduced and three tested CSRC joints were simulated to verify the program. It was indicated that the calculated results, including the stress state of material, crack development of concrete and the skeleton curves of specimens, showed good agreement with test results. Based on the program verification, nonlinear finite element analysis of the joints with different anchor details of core steel, concrete strength and strength ratio of joint to beam were carried out. Parameter analysis ind