焊接应力对钢管混凝土多肢中柱双层肩梁力学性能的影响及承载试验设计  

INFLUENCE OF WELDING STRESS ON MECHANICAL PERFORMANCES OF DOUBLE-LAYER SHOULDER BEAMS WITH MULTI-LIMB MIDDLE COLUMNS OF CONCRETE-FILLED STEEL TUBES AND TEST DEGSIN FOR THE BEARING PERFORMANCES

作　　者：兰涛[1,2] 李然 门进杰 张亮[1] 廖钒志[1] LAN Tao;LI Ran;MEN Jinjie;ZHANG Liang;LIAO Fanzhi(School of Civil Engineering,Xi’an University of Architecture&Technology,Xi’an 710055,China;CSIC International Engineering Co.,Ltd.,Beijing 100021,China)

机构地区：[1]西安建筑科技大学土木工程学院,西安710055 [2]中国船舶重工集团国际工程有限公司,北京100021

出　　处：《工业建筑》2021年第9期41-46,165,共7页Industrial Construction

基　　金：国家重点研发计划项目(2017YFC0703406);中国船舶重工集团科技创新与研发项目(I00121L2019)。

摘　　要：为研究钢管混凝土多肢中柱双层肩梁在水平刹车荷载作用下的受力性能,结合实际工程,共设计了6个多肢中柱双层肩梁试件,考虑焊接对试件受力性能的影响,对多焊缝相交处进行有限元分析。结果表明:距离多焊缝汇接点4 cm范围内的温度和应力变化剧烈,焊接完成后变形较大,对试件的力学性能具有很大的影响,故在试件制作中应将次焊道断开,汇接点与主焊道最小间距不小于4 cm。同时,详细分析了肩梁试件的制作方法,最大程度地降低试件加工制作对其力学性能的影响。In order to study the mechanical properties of double-layer shoulder beams with multi-limbe middle columns of concrete-filled steel tubes(CFST) subjected to braking loads,six specimens of double-layer shoulder beams with multi-limb middle columns of CFST were designed in combination with practical projects.Considering the influence of welding on the mechanical properties of specimens,the intersection of multiple welds was selected for finite element analysis.The results showed that the temperature and stress within 4 cm from the multi-weld junction changed significantly,and the deformation after welding was large,which had a great impact on the mechanical properties of specimens.Therefore,the secondary weld bead should be disconnected in the process of welding of specimens,and the minimum distance between the secondary weld bead and the main weld bead should be no less than 4 cm.At the same time,the fabrication method of shoulder beam specimens was analyzed in detail to minimize the influence of specimen fabrication on its mechanical properties.

关 键 词：钢管混凝土双层肩梁 焊接 试验 有限元分析 

分 类 号：TU398.9[建筑科学—结构工程]