圆钢管-横向板相贯连接节点轴向刚度研究

赵必大; 刘成清; 余丛迪; 陈安华

doi:10.3969/j.issn.0258-2724.2017.05.019

圆钢管-横向板相贯连接节点轴向刚度研究

doi: 10.3969/j.issn.0258-2724.2017.05.019

赵必大^1,2,
刘成清^3, ,,
余丛迪⁴,
陈安华⁴

基金项目:

浙江省自然科学基金资助项目（LY16E080012）

详细信息

作者简介:
赵必大(1976-),男,讲师,博士,研究方向为钢结构与组合结构,电话:0571-88320607,E-mail:zhaobida@126.com

通讯作者:
刘成清(1976-),男,副教授,博士,研究方向为新型结构体系、结构试验与数值仿真等,E-mail:lcqjd@swjtu.cn

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出版历程
- 收稿日期: 2016-04-08
- 刊出日期: 2017-10-25

Axial Rigidity of Unstiffened Transverse Plate-to-Circular Hollow Section (CHS) Joints

摘要

摘要: 为了研究圆钢管-横向板相贯节点的轴向初始刚度，在分析传力方式和局部变形特点的基础上，建立了用于T形节点、十字形节点刚度计算的半圆拱模型、圆环模型，推导了节点刚度理论式.运用麦克劳林级数将理论式中的复杂函数简化为指数函数与幂函数的乘积，再考虑到板管厚度比的影响，利用多元回归分析技术，获得T、十字形节点的轴向初始刚度参数化计算式.研究结果表明：节点轴向初始刚度与弹性模量和主管直径成正比，与板管厚度比呈对数函数关系，与主管径厚比、宽径比（板宽与管直径比）呈相互影响的幂函数、指数函数关系；弯矩和剪力并不影响弹性受力状态下的节点轴向初始刚度，计算式所得初始刚度值与有限元结果的相对误差小于10%.
- 圆钢管-横向板相贯节点 /
- 节点轴向初始刚度参数化计算式 /
- 半圆拱模型 /
- 圆环模型 /
- 参数化分析
Abstract: To study the initial axial rigidity of transverse plate-to-circular hollow section (CHS) joint, a semicircular arch and circular ring models for the rigidity calculation of T-type and cross shaped-type plate-to-CHS joints were developed based on the analysis of force transferring mechanism and local deformation characteristics. Utilizing maclaurin series expansion and multiple nonlinear regression analysis, the complex theoretical formula was simplified to the product of an exponential function and a power function. A calculation formula for the initial axial rigidity was established by introducing the neglected influential factor, plate-to-CHS thickness ratio. The results indicate that the initial axial rigidity of joints is directly proportional to CHS diameter and elastic modulus, and it has a logarithmic relationship with plate-to-CHS thickness ratio, showing power function with CHS diameter-to-thickness ratio and exponential function with plate width-to-CHS diameter ratio. The last two ratios affect each other. The rigidity is not affected by bending and shear when the joints is under the elastic stress, and the relative errors between the theoretical rigidities calculated by the proposed formula and the finite element analysis (FEA) are less than 10%.
- unstiffened transverse plate-to-CHS joints /
- initial axial rigidity of joints /
- semicircular arch model /
- circular-ring model /
- parametric analysis

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