摘要
为研究高韧性水泥基复合材料（UHTCC）局部增强框架节点的抗震性能，对8个 UHTCC局部增强框架节点和1个对比节点进行了低周反复荷载试验和非线性有限元分析，分析了轴压比、节点核心区配箍特征值和梁端UHTCC浇筑范围对节点抗震性能的影响．结果表明：基于OpenSees的有限元计算结果与试验结果较符合，UHTCC材料具有良好的裂缝控制能力，能显著改善框架节点的抗震性能，较高的轴压比可提高节点的抗剪能力但会降低其变形能力；考虑节点延性需要和施工方便等特点，节点核心区配箍特征值建议取值范围为0．07～0．10．
To investigate the seismic behavior of ultra high toughness cementitious composite （U HTCC） reinforced beam‐column joints ,eight local enhancement beam‐column joints and one con‐trol beam‐column joints were tested under constant axial load and cyclic lateral force .Influence of axi‐al compression ratio ,stirrup characteristic value and the pouring range of UHTCC were analyzed .Re‐sults show that calculation result based on the OpenSees finite element has good agreement with the test results ,and UHTCC material can significantly control the crack at joints area .Higher axial com‐pression ratio can increase the shear capacity of nodes but will reduce its deformation capacity .Stirrup characteristic value is proposed to be set between 0 .07 to 0 .10 for the need of ductility and the charac‐teristics of convenient construction .
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2015年第9期110-113,共4页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(50908029)
关键词
超高韧性水泥基材料
梁柱节点
抗震性能
有限元分析
参数分析
OpenSees
high toughness cementitious composites
beam-column joints
seismic performance
finite element analysis
parameter analysis
OpenSees
