【作者】 张令心； 郭宁； 刘洁平；

【Author】 ZHANG Ling-xin;GUO Ning;LIU Jie-ping;Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics,China Earthquake Administration;Institute of Structural Dynamics and Control, School of Aeronautics, Northwestern Polytechnical University;

【机构】 中国地震局工程力学研究所中国地震局地震工程与工程振动重点实验室； 西北工业大学航空学院结构动力学与控制研究所；

【摘要】 针对现代穿斗木构架房屋常见的榫卯节点直榫和燕尾榫这两种形式的传力特性、破坏形态和耗能机理加以分析。根据直榫和燕尾榫的构造特点和所受外荷载的情况,详细分析了其传力特性;根据榫卯节点榫头与卯口之间的运动状态和受力行为,给出了榫卯节点的受力与位移(或变形)关系及其描述;由传力特性分析,建议榫卯节点可视为一种特殊的半刚性节点。根据榫卯节点的传力特性,结合其构造特性、几何特性、材料特性,给出并详细描述了榫卯结构的四种主要破坏形态,发现榫卯节点的榫头颈部和卯口扩口处是易产生应力集中的部位,也是最易发生破坏的部位。在上述榫卯节点传力特性和破坏形态研究的基础上,结合现有试验研究结果,分析研究认为榫卯节点耗能机理与摩擦阻尼器大致相同。本文研究可为穿斗木构架房屋整体抗震性能分析奠定基础。更多还原

【Abstract】 In the modern mortised timber frame house there are two common types of mortise-tenon joint, which are straight tenon and dovetail joint. In this paper, the load transfer feature, failure mode and energy dissipation mechanism of these two kinds of joint types were analyzed and studied. According to the construction characteristics and external load actions of straight tenon and dovetail joint, the load transfer feature is analyzed in details; according to the motion state and load-bearing behavior between the tenon and mortise of joint, the relationship between load and displacement(or deformation) and its description of mortise-tenon joint were provided; by the analysis of load transfer feature, the suggestion was provided that the mortise-tenon joint could be regarded as a special kind of semi-rigid joint. By the load transfer feature of mortise-tenon joint, combined with the construction characteristic, geometric characteristic, and material characteristics, four failure modes were obtained. It can be found that the stress concentration phenomenon was easy to produced in the neck position of tenon ends and the expansive edge position of mortise, where were also the failure mode positions of the mortise-tenon joint. On the base of the mortise-tenon joint study of load transfer feature and failure mode, combined with the existing test results of the mortise-tenon joint, it could be obtained that the mortise-tenon joint had the similar energy-dissipating mechanism to friction dampers. A foundation of the integral seismic capability analysis of mortised timber frame house was laid in this paper.更多还原