平身科斗栱节点侧向荷载-位移计算模型  

Lateral load-displacement calculation model for Pingshen-ke dou-gong bracket

作　　者：凌怀泉 薛建阳[1,2] 宋德军 周睿 张哲 宋晓滨[3] LING Huaiquan;XUE Jianyang;SONG Dejun;ZHOU Rui;ZHANG Zhe;SONG Xiaobin(School of Civil Engineering,Xi′an Univ.of Arch.&Tech.,Xi′an 710055,China;Key Lab of Structural Engineering and Earthquake Resistance,Ministry of Education(XAUAT),Xi′an 710055,China;School of Civil Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]西安建筑科技大学结构工程与抗震教育部重点实验室,陕西西安710055 [3]同济大学土木工程学院,上海200092

出　　处：《西安建筑科技大学学报（自然科学版）》2024年第5期701-706,共6页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家自然科学基金(52278317)。

摘　　要：平身科斗栱在减小梁跨度、分配屋面荷载和协同抵抗侧向变形中发挥着重要作用.为建立面宽方向加载的平身科斗栱节点的侧向荷载-位移计算模型,在分析节点构造特征和水平往复荷载作用下斗栱的受力状态基础上,结合典型节点模型参数及木结构抗侧构件荷载-位移骨架曲线表征方法,计算了竖向荷载和面宽方向施加水平荷载共同作用下平身科斗栱骨架曲线上的弹性荷载、峰值荷载及相应位移.建立的平身科斗栱节点侧向荷载-位移计算模型与试验数据进行对比,验证了该计算模型的正确性.结果表明,建立的侧向荷载-位移力学模型弹性段与试验骨架曲线吻合良好,能较好地反映模型弹性段刚度及其侧向承载力,但对峰值荷载的计算值偏小.Pingshen-ke dou-gong bracket plays an important role in reducing beam span,distributing roof loads and resisting lateral deformation.In order to establish the lateral load-displacement calculation model of Pingshen-ke dou-gong bracket along the width direction,the elastic load,peak load and the corresponding displacement on the load-displacement skeleton curve of the dou-gong brackets under the combined vertical and horizontal loading are calculated based on the analysis of the structural characteristics and the mechanical behavior of the dou-gong bracket under low-cycle reversed loading,combined with the specimen parameters of the typical Pingshen-ke dou-gong bracket and the existing method for characterizing the lateral load-displacement skeleton curve of the lateral components for related wooden structures.The lateral load-displacement calculation model of Pingshen-ke dou-gong bracket is established and compared with the experimental data,which verifies the correctness of the calculation model.The results show that the elastic stage of the established lateral load-displacement calculation model is close to the skeleton curve of the test,which can better reflect the initial lateral stiffness and its elastic limit load,but the peak load may be underestimated.

关 键 词：古建筑木结构 平身科斗栱 侧向荷载-位移模型 弹性荷载 峰值荷载 

分 类 号：TU366[建筑科学—结构工程]