胶合木网壳半刚性节点受力性能试验研究

发布时间：2018-07-29 17:31

【摘要】：针对凯威特六型胶合木网壳节点,设计并制作了12个足尺节点试件。进行了在胶合木构件轴压力为0、100、200 k N和300 k N共4种工况下节点的受弯承载性能试验,对节点抗弯刚度和受力性能进行分析,研究节点的弯矩-转角关系、节点域破坏模式及其与构件轴压力的关系。结果表明:节点域破坏模式可分为胶合木构件受压破坏、受拉破坏和界限破坏。节点域胶合木构件受拉破坏的节点受弯承载力随木构件轴压力的增大而增加。随着胶合木构件轴压力的增加,节点的初始抗弯刚度增大。发生节点域胶合木构件受压破坏的节点,其刚度较木构件受拉破坏的节点有较大提高。试验测得了节点的荷载-位移曲线和弯矩-转角曲线,并拟合得到了弯矩-转角关系方程,结果表明适度的木构件轴压力有助于提高节点连接的延性。
[Abstract]:Twelve full-scale joint specimens were designed and fabricated for Cavette-6 glued wood reticulated shell joints. In this paper, the flexural bearing capacity of the joints under the axial pressure of 0100200 KN and 300KN is tested. The bending stiffness and mechanical performance of the joints are analyzed, and the relationship between the moment and the rotation angle of the joints is studied. The failure mode of node domain and its relationship with axial pressure. The results show that the failure modes of joint domain can be divided into compression failure, tensile failure and limit failure. The flexural capacity of joints damaged by tensile failure in joint domain increases with the increase of axial pressure of wood members. The initial bending stiffness of the joints increases with the increase of the axial pressure of the glued wood members. The stiffness of the joints under compression failure of glued wood members in the joint domain is much higher than that of the joints damaged by the tensile failure of the wood members. The load-displacement curves and moment-rotation curves of joints were measured and the relationship equations of moment and rotation angles were fitted. The results show that proper axial pressure of wood members helps to improve the ductility of joint connections.
【作者单位】：哈尔滨工业大学结构工程灾变与控制教育部重点实验室;哈尔滨工业大学土木工程学院;
【基金】：国家自然科学基金项目(51278154,51108127)
【分类号】：TU366.2

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