摘要
为保留砌体结构农房的传统特征和提高其抗震性能,提出一种镶嵌于砌块墙体内部的方钢管砂卵石组合圈梁构造柱(简称组合圈梁构造柱),并研究该组合圈梁构造柱约束砖墙体的抗震性能。给出了组合圈梁构造柱装配式连接方式,验证了砂卵石填充方钢管圈梁构造柱建造技术的可行性。对5片砖墙体试件进行了低周反复水平加载试验,研究了组合圈梁构造柱约束砖墙的破坏模式、承载能力、变形能力和耗能能力等,分析了组合圈梁构造柱与砖墙之间的相互作用机理和破坏机制,推导了组合圈梁构造柱约束砖墙的受剪承载力计算式,讨论了组合圈梁构造柱对砖墙的约束效应。结果表明:组合圈梁构造柱约束砖墙裂纹发展充分,具有典型的弯剪破坏特征;组合圈梁构造柱约束砖墙的加载循环次数多,滞回环形状饱满,与无约束砖墙相比,其峰值荷载对应位移和承载力分别提高了279.75%和154.06%;有组合圈梁构造柱约束的砖墙具有良好的延性和耗能能力,与无约束砖墙相比,其位移延性系数和累积耗能分别提高了323.94%和5 704.31%;建议的受剪承载力计算式能较准确地计算组合圈梁构造柱约束砖墙的受剪承载力和约束效应。
In order to preserve the traditional characteristics and improve the seismic performance of the masonry structure farmhouse, an assembled column-beam confining system made of square sand-pebble-filled steel tube( referred to as assembled tie beam-column) embedded in the masonry wall was proposed,and the seismic performance of the beam-column system confined brick walls was investigated. The assembly connection method of the square steel tube tie column-beam was given to verify the feasibility of the construction method. In addition,pseudo-static low cycle tests were carried out on five pieces of brick wall specimens with different constraints and vertical pressures,and the failure mode,load carrying capacity,deformation ability and energy dissipation capacity of constrained brick wall specimens were studied. The interaction mechanism and failure mechanism between the proposed tie column-beam confining system and the brick wall were analyzed,and the calculation formula for the shear load capacity of the constrained brick wall was deduced. Besides,the constraint effect of the tie beam column on the brick wall was discussed. It is found that the cracks on these brick walls constrained by the proposed tie column-beam confining system are fully developed and the typical bending-shear failure characteristics are clearly observed. The brick wall constrained by the proposed tie column-beam confining system can resist a large number of loading cycles while the shape of hysteresis loops is full. Compared with the reference brick wall specimens,the displacement and bearing capacity corresponding to the peak load are increased by 279. 75% and 154. 06%,respectively. Furthermore,the brick wall constrained by the proposed tie column-beam confining system has good ductility and energy dissipation capacity,and the ductility and cumulative energy consumption are increased by 323. 94% and 5 704. 31%,respectively. Finally,the proposed equations can accurately determine the shear capacity and the confining effect of brick walls const
作者
张春涛
邓传力
刘宜丰
ZHANG Chuntao;DENG Chuanli;LIU Yifeng(School of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang 621010,China;College of Engineering,University of Tibet,Lasa 850000,China;China Southwest Architectural Design and Research Institute Corporation,Ltd.,Chengdu 610000,China)
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2021年第3期24-33,共10页
Journal of Building Structures
基金
国家自然科学基金项目(51568058,51508482)
西藏自治区科技计划项目(CGZH2018000014)
四川省大学生创新创业训练计划项目(201810619068)。
关键词
圈梁构造柱
方钢管砂卵石
拟静力试验
抗震性能
受剪承载力
约束效应
tie beam and tie column
square sand-pebble-filled steel tube
quasi-static test
seismic performance
shear capacity
confining effect
