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。
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 indicated that the strength of specimens increased with the increase of strength ratio of joint to beam, while the deformation ability of specimens decreased. When the anchor area of core steel in joint core increased, the strength and deformation ability of specimens increased. This paper can provide references for the engineering practice of CSRC structures.
出处
《工程力学》
EI
CSCD
北大核心
2011年第8期99-105,112,共8页
Engineering Mechanics
基金
国家自然科学基金项目(51006133
50978107)
教育部新世纪优秀人才支持计划项目(NCET-06-0571)
福建省自然科学基金项目(2010J05117
2010J01298)
厦门市科技计划项目(3502Z20103030)
华侨大学科研基金项目(09BS620)
