木结构钢插板螺栓连接节点刚度及力-位移关系数学模型
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作者:
作者单位:

1.郑州大学 土木工程学院,河南 郑州 450001;2.中建二局第四建筑工程有限公司,天津 300457;3.同济大学建筑设计研究院(集团)有限公司,上海 200092

作者简介:

刘应扬(1987—),男,讲师,工学博士,主要研究方向为木结构。E-mail: liuyingyang5687@qq.com

通讯作者:

钱辉(1978—),男,教授,工学博士,主要研究方向为结构振动控制。E-mail:qianhui@zzu.edu.cn

中图分类号:

TU366.2

基金项目:

中国博士后科学基金(2018M632804);河南省博士后科研项目(001702034);郑州大学大学生创新创业训练计划项目(201910459091,2020cxcy223)


Mechanical Model of Stiffness and Load-Displacement Relationship of Timber Bolted Connection with Slotted Steel Plate
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Affiliation:

1.College of Civil Engineering, Zhengzhou University, Zhengzhou 450001, Henan,China;2.The Fourth Construction Engineering Co., Ltd., China Construction Second Engineering Bureau, Tianjin 300457, China;3.Tongji Architectural Design (Group) Co., Ltd., Shanghai 200092, China

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    摘要:

    为研究木结构钢插板螺栓连接节点的力?位移关系,对24个顺纹试件进行了单调加载试验,考虑了螺栓直径、木材厚度以及两者比值的影响。试验结果表明,节点的变形能力较强,加载过程中经历了线性阶段、弹塑性阶段、塑性发展阶段和破坏阶段。基于曲线拟合,节点的力?位移关系可归纳为承载力、弹性刚度的两参数力学模型;通过理论分析,提出了节点承载力、弹性刚度的理论计算公式。最后,通过理论公式和力学模型,对钢插板螺栓连接节点的力?位移关系曲线进行了计算,理论计算曲线与试验曲线吻合较好。

    Abstract:

    In order to study the load-displacement relationship of the timber bolted connection with slotted steel plate, monotonic tests were performed on 24 specimens in the direction parallel to timber grain, considering the bolt diameter, the dowel bearing length and the slender ratio. The experimental results show that the connection undergoes the elastic stage, elastic-plastic stage, plastic-developing stage and failure, performing well in terms of deformation. Based on the curve fitting, a two-parameter (i.e.,strength and elastic stiffness) mechanical model was proposed and theoretical formulas of the two parameters were derived. Finally, with the theoretical formulas and mechanical model, a calculation was conducted to obtain the load-displacement relationship curves of the specimens, which was found to be in good agreement with the test results.

    表 2 试件破坏模式统计Table 2
    表 5 承载力、弹性刚度理论计算值Table 5
    表 4 参数取值Table 4
    图1 木结构螺栓连接节点Fig.1 Timber bolted connections
    图2 木结构螺栓连接受弯Fig.2 Timber bolted connection under moment
    图3 钢插板螺栓连接节点顺纹力学性能试验示意Fig.3 Sketch of experimental study of mechanical performance of timber bolted connection
    图4 试件设计详图(单位:mm)Fig.4 Layouts of connections (unit: mm)
    图5 试件加载装置Fig.5 Test setup for specimen
    图6 节点破坏模式Fig.6 Failure modes of connections
    图7 试件力‒位移曲线Fig.7 Load and displacement relationship curves of specimens
    图8 主要力学性能参数定义Fig.8 Definition of parameters of main mechanical performance
    图9 螺栓节点全过程荷载-位移曲线示意Fig.9 Typical load-displacement curve of a bolted connection
    图10 力学模型曲线示意Fig.10 Load-displacement curve of theoretical mechanical model
    图11 节点极限状态受力分析Fig.11 Free body diagrams of ultimate limit state for connections
    图12 螺杆受力分析Fig.12 Free body diagrams of bolt
    图13 木材销槽承压试验及力学性能参数Fig.13 Dowel-bearing test and mechanical parameters of wood
    图14 计算曲线与试验曲线的对比Fig.14 Theoretical calculation versus test
    表 3 试件主要力学性能参数Table 3
    表 1 试件类型Table 1
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引用本文

刘应扬,舒佳佳,林长胜,于丹,张继鲁,赵杨,钱辉.木结构钢插板螺栓连接节点刚度及力-位移关系数学模型[J].同济大学学报(自然科学版),2021,49(3):312~321

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  • 收稿日期:2020-09-05
  • 在线发布日期: 2021-04-06
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