配置柱靴胶合木柱抗震性能试验研究  

Experimental study on seismic behavior of glulam columns with column-shoes

作　　者：谢启芳[1,2] 张毅 吴亚杰 张利朋 XIE Qifang;ZHANG Yi;WU Yajie;ZHANG Lipeng(State Key Laboratory of Green Building in Western China,Xian University of Architecture&Technology,Xi’an 710055,China;School of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China)

机构地区：[1]西安建筑科技大学西部绿色建筑国家重点实验室,陕西西安710055 [2]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《建筑结构学报》2022年第12期223-232,共10页Journal of Building Structures

基　　金：西部绿色建筑国家重点实验室自主研究课题(LSZZ202116);国家自然科学基金项目(51878550);陕西省教育厅协同创新中心项目(21JY026)。

摘　　要：为减轻胶合木结构的地震损伤和提升结构抗震性能,提出在木柱柱脚套入钢质柱靴,柱靴通过设置碟形弹簧的高强螺栓与基础连接,形成一种基于摇摆原理的配置柱靴胶合木柱。对4个1/2缩尺的配置柱靴胶合木柱进行了低周反复荷载试验,研究了柱靴底板宽度、碟形弹簧初始预紧力与刚度对木柱抗侧力、滞回性能及自复位性能等的影响。结果表明:不同于普通螺栓钢填板柱脚的横纹劈裂破坏,配置柱靴胶合木柱主要表现为与柱靴接触部位木材的横纹局部损伤;在竖向荷载和碟簧预紧力的共同作用下,配置柱靴胶合木柱的滞回曲线为典型的“双旗帜形”,木柱表现出良好的自复位能力和耗能能力;增大柱靴底板宽度、碟形弹簧初始预紧力和刚度,均会增大木柱的抗侧力、耗能能力与自复位能力。在分析配置柱靴胶合木柱工作机理的基础上,建立了配置柱靴胶合木柱弯矩-位移角简化模型,模型计算结果与试验结果吻合较好。To reduce the seismic damage of glulam timber structures and improve their seismic performance, a novel glulam column with column-shoes based on the rocking mechanism was proposed. The steel column-shoe was inserted into the base of the timber column and was connected with the foundation by high-strength bolts with the disc spring. Four 1/2 scaled glulam column specimens with column-shoes were tested under cyclic loading. The effects of column-shoes width, initial preload and stiffness of disc spring on the lateral force resistance, hysteretic behavior and self-centering performance of the columns were studied. The results show that different from splitting failure perpendicular to the grain of wood of the common bolted column base, the glulam columns with column-shoes mainly experience local damage perpendicular to the grain of the wood in contact with the column-shoes. Under the combined action of vertical load and disc spring preload, the hysteretic curve of glulam columns with column-shoes typically has a double-flag shape, and the specimens have great self-centering capacity and energy dissipation capacity. The lateral force resistance, the self-centering capacity and the energy dissipation capacity of columns increase with the column-shoes width, initial preload and stiffness of disc spring. Based on the analysis of the working mechanism of glulam columns with column-shoes, a simplified model for the moment-drift ratio relationship was established. The calculated results of the model are in good agreement with the experimental results.

关 键 词：胶合木柱 柱靴 低周反复荷载试验 抗震性能 局部损伤 自复位 简化分析模型 

分 类 号：TU366.303[建筑科学—结构工程]