木质摩擦转动节点连接胶合木框架抗震性能试验研究与理论分析  

Seismic performance of glulam timber frame with wooden frictional rotational connections:experimental study and theoretical analysis

作　　者：谢启芳[1,2] 张毅 闫竹玲 张利朋 吴亚杰 Xie Qifang;Zhang Yi;Yan Zhuling;Zhang Lipeng;Wu Yajie(School of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;State Key Laboratory of Green Building in Western China,Xi’an University of Architecture and Technology,Xi’an 710055,China;Key Lab of Structural Engineering and Earthquake Resistance of the Ministry of Education,Xi’an University of Architecture and Technology,Xi’an 710055,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]西安建筑科技大学西部绿色建筑国家重点实验室,陕西西安710055 [3]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

出　　处：《土木工程学报》2023年第7期34-44,共11页China Civil Engineering Journal

基　　金：国家自然科学基金(52178303);陕西省杰出青年科学基金(2021JC-44)。

摘　　要：传统钢填板连接胶合木框架在地震作用下梁端、柱端易发生劈裂破坏导致修复困难。该文研发了一种由木质摩擦转动梁柱节点与配置柱靴柱脚节点组成的新型胶合木框架,并分别对1/2缩尺单层单跨的一榀传统胶合木框架与一榀新型胶合木框架试件进行低周反复荷载试验,研究两类胶合木框架在破坏形态、滞回性能、耗能能力等方面的区别。结果表明:在侧向变形较小时,两类胶合木框架均无明显破坏,但随着变形增大,传统胶合木框架梁端发生明显劈裂破坏,而木质摩擦转动节点连接胶合木框架基本完好,震后可继续正常使用或易于修复;木质摩擦转动节点连接胶合木框架在承载力、刚度基本与传统胶合木框架接近时,其耗能性能显著提升,等效黏滞阻尼系数提升了约1倍。通过理论分析建立了木质摩擦转动节点连接胶合木框架的滞回模型,模型计算结果与试验结果吻合良好。基于上述结果,所研发木质摩擦转动节点连接胶合木框架可在进一步研究后推广应用。Traditional glulam frame connected with slotted-in steel plate are prone to damage at the beam and column ends under the action of earthquake,resulting in poor recoverability of structures.A new timber frame(WFCF)assembled by wooden frictional beam-to-column connections(WFC)and column base joint with column-shoes was developed.Reversed cyclic loading tests were conducted on 1/2 scaled single-layer single span traditional timber frame(TTF)and WFCF specimens,respectively.The failure mode,hysteretic behavior and energy dissipation capacity of the specimens were studied.The research results showed that both WFCF and TTF were basically intact under small lateral deformation.However,the splitting failure of TTF was observed when the lateral deformation increased,while WFCF was in good condition,indicating that the function of WFCF can be restored after earthquake.Compared with TTF,the WFCF had almost the same bearing capacity and stiffness,but the energy dissipation capacity was significantly improved,and its equivalent viscous damping coefficient was increased by about 100%.The hysteresis model of WFCF was established,and the prediction model of the hysteretic curve was in good agreement with the experimental results.The developed WFCF can be popularized and applied after further research.

关 键 词：木质摩擦转动节点 柱脚节点 胶合木框架 抗震性能 滞回模型 

分 类 号：TU366.3[建筑科学—结构工程]