腹杆截面不对称圆钢管搭接节点极限承载力研究  

Research on Ultimate Capacity of Circular Hollow Section Overlapped Joints with Different Section of Braces

作　　者：陈誉[1,2] 

机构地区：[1]华侨大学土木工程学院,泉州362021 [2]中原油田博士后科研工作站,濮阳457001

出　　处：《特种结构》2010年第3期61-63,共3页Special Structures

基　　金：福建省自然科学基金资助项目(2010J01299);大连理工大学海岸和近海工程国家重点实验室开放基金项目(LP1005);泉州市第一批技术研究与开发项目(重点项目)(2009Z48);桥梁结构工程交通行业重点实验室开放基金项目(CQSLBF-Z07-1)

摘　　要：本文建立了合理的有限元模型,对腹杆截面不对称圆钢管搭接节点进行材料和几何非线性计算,得出的极限承载力具有相当的准确度。由分析可知,把直径较大和壁厚较厚的腹杆作为贯通腹杆节点,其极限承载力较高且构造较为合理。当搭接腹杆直径变小、壁厚变薄后,CW和TW型搭接节点极限承载力均相对对称节点下降。通过对公式的计算结果与钢管节点数据库中腹杆不对称圆钢管搭接节点试验结果进行比较可知,计算公式可以准确地预测腹杆截面不对称搭接K型节点极限承载力。The rational FEA model was established in this paper ,for non-linear calculation of ultimate capacity of CHS overlapped joints with different section of braces. The ultimate capacity of CHS overlapped joints with greater diameter and thickness of through brace is reasonable. When diameter and thickness of lap brace became smaller, the ultimate capacity of both CW and TW type overlapped joints decreased compared with symmetrical overlapped joints. By comparing calculation result of formulae with experiment result of overlapped joints with different section of brace, it could be concluded that the formulae can accurately predict ultimate capacity of CHS overlapped K-joints with different section of braces.

关 键 词：圆钢管搭接节点 腹杆截面不对称 极限承载力 有限元分析 

分 类 号：TU392.3[建筑科学—结构工程]