弦杆弯折对圆钢管节点抗弯承载力的影响分析  

Analysis for fold chord effect on the moment resistance of CHS unstiffened T-joints

作　　者：陈誉[1] 彭兴黔[1] 陈荣淋[1] 

机构地区：[1]华侨大学土木工程学院,福建泉州362021

出　　处：《山东建筑大学学报》2007年第5期380-386,共7页Journal of Shandong Jianzhu University

基　　金：福建省科技重大专项资助项目(2005YZ1016);福建省自然科学基金计划资助项目(E0510022);华侨大学科研基金资助项目(07BS201);福建省青年科技人才创新项目(2007F3065)

摘　　要：对弦杆为折杆的圆钢管T型相贯节点平面内抗弯极限承载力研究的必要性和国内外目前的研究现状作了简述。对该类节点的平面内抗弯承载力破坏准则做出了定义。通过弦杆为直杆的T型节点平面内抗弯承载力有限元计算结果与《空心管结构连接设计指南》计算值比较,认为可以利用经过试验验证的板壳有限元方法进行弦杆为折杆的T型节点平面内抗弯极限承载力分析。研究结果表明,随弦杆弯折角度Φ值的增大节点抗弯极限承载力增大,弯折角度30°以内可以忽略由于弦杆弯折带来的节点抗弯承载力提高。通过单参数分析各参数对平面内抗弯承载力的作用趋势和影响大小。在一定的几何参数条件下,节点抗弯承载力大于杆件抗弯承载力。Brief introduction was made about the necessity of the research on in-plane bending ultimate capacity of CHS unstiffened joints with fold chord and the research status in quo both home and abroad. Definition was presented of the failure criteria on in-plane bonding ultimate capacity of CHS T-joints. Comparing FEA results with the calculated value of CIDECT of in-plane bonding ultimate capacity of T-type CHS with straight chord, analysis was made for in-plane bonding ultimate capacity of CHS with fold chord by using FEA validated by joints experiment. Research result showed that with increasing, bonding ultimate capacity of joints increased, and inclination of chord effect on in-plane bonding ultimate capacity could be neglected if inclination degree within 300. Analyzed is the effect of geometrical parameters on in-plane bonding ultimate capacity. Bending ultimate capacity of joints is larger than that of brace members under certain geometrical parameters conditions.

关 键 词：T型圆钢管相贯节点 直杆 折杆 平面内抗弯承载力 有限元分析 

分 类 号：TU392.3[建筑科学—结构工程]