型钢高强高性能混凝土框架节点非线性有限元分析  

Nonlinear Finite Element Analysis on SRHSHPC Frame Joints

作　　者：曾磊[1] 许成祥[1] 郑山锁[2] 吕营[2] 

机构地区：[1]长江大学城市建设学院,湖北荆州434023 [2]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《工程抗震与加固改造》2010年第2期37-41,共5页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金项目(50378080);湖北省教育厅科研项目(Q20091208);长江大学科研发展基金项目(20080204)

摘　　要：为研究高强高性能混凝土框架节点的受力性能,考虑型钢与混凝土之间的粘结滑移进行了非线性有限元分析,考虑的影响因素为混凝土强度和柱轴压比,通过对比计算结果与试验结果验证了数值模拟的可行性。结果表明:轴压比能在一定程度上提高节点抗剪承载能力,但是降低了其延性;相同条件下混凝土强度高的节点延性性能较普通型钢混凝土节点的略差,但型钢的有力约束改善了其本身延性差所带来的脆性特征。To understand mechanical characteristics of steel reinforced high strength and high performance （SRHSHPC） frame joints, the finite element （FE） analysis considering the interfacial bond-slip between steel and concrete is proposed in this research. Comparison between FE result and test result under different concrete strength grade and different axial load shows the accuracy of the proposed method. The result indicates that axial load can improve joints＇ shear capacity to some extent but joints＇ ductility is decreased, higher concrete strength possesses worse ductility compared with steel reinforced normal concrete joints under the same condition joints, but constraint of steel to concrete improves brittleness character caused by concrete＇ s bad ductility.

关 键 词：型钢混凝土结构 高强高性能混凝土 框架节点 有限元 

分 类 号：TU398.9[建筑科学—结构工程]