|本期目录/Table of Contents|

[1]高诣民,刘永健,姜 磊,等.PBL加劲型矩形钢管混凝土桁架受弯性能试验[J].建筑科学与工程学报,2017,34(05):171-180.
 GAO Yi-min,LIU Yong-jian,JIANG Lei,et al.Experiment on Flexural Behaviour of Rectangular Concrete Filled Steel Tubular Truss Stiffened with PBL[J].Journal of Architecture and Civil Engineering,2017,34(05):171-180.
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
34卷
期数:
2017年05期
页码:
171-180
栏目:
出版日期:
2017-09-22

文章信息/Info

Title:
Experiment on Flexural Behaviour of Rectangular Concrete Filled Steel Tubular Truss Stiffened with PBL
作者:
高诣民刘永健姜 磊刘君平刘欣昊
长安大学公路学院
Author(s):
GAO Yi-min LIU Yong-jian JIANG Lei LIU Jun-ping LIU Xin-hao
School of Highway, Chang’an University
关键词:
桥梁工程PBL加劲型矩形钢管混凝土桁架受弯试验破坏模式竖向挠度限值节点变形整体变形
Keywords:
bridge engineering rectangular concrete filled steel tubular truss stiffened with PBL flexural experiment failure mode limiting value of vertical deflection joint deformation overall deformation
分类号:
-
DOI:
-
文献标志码:
A
摘要:
通过3片开孔钢板(PBL)加劲型矩形钢管混凝土桁架和1片矩形钢管混凝土桁架受弯性能试验,研究主管内设PBL及节点支主管宽度比β对桁架破坏模式、支主管应变变化和极限承载力的影响,对桁架竖向挠度限值进行分析,并探讨节点变形对桁架整体变形的影响。结果表明:矩形钢管混凝土桁架和PBL加劲型矩形钢管混凝土桁架均发生节点破坏,主管内设PBL改变了管内混凝土的开裂模式,有效限制了混凝土裂缝发展,使钢管与混凝土更好地协同受力;矩形钢管混凝土桁架和β分别为0.5,0.75,0.875的PBL加劲型矩形钢管混凝土桁架的节点变形占桁架整体变形比例分别为33.43%,24.44%,23.69%和21.44%,PBL有效限制受拉支管处主管的外凸变形,使节点变形占桁架整体变形比例减小,提高节点承载力,但对受压支管处主管变形基本无影响;对于矩形钢管混凝土和PBL加劲型矩形钢管混凝土组合桁梁桥竖向挠度限值可参考《公路钢结构桥梁设计规范》(JTG D64—2015)取为桁架全长的1/500。
Abstract:
Through flexural experiment on 3 rectangular concrete filled steel tubular trusses stiffened with PBL and 1 rectangular concrete filled steel tubular truss, the influences of PBL set inside main pile and width ratio β of main pile and branch pipe on the failure modes of trusses, strains of main pile and branch pipe, and ultimate bearing capacity were studied. The limiting values of vertical deflection of trusses were analyzed, and the influence of joint deformation on overall deformation of truss was discussed. The results show that joint failures occur in rectangular concrete filled steel tubular truss and rectangular concrete filled steel tubular trusses stiffened with PBL. The PBL set inside the tube can change the crack mode of concrete, the crack development is limited, and the steel tube and concrete work better together. The proportion of joint deformation of rectangular concrete filled steel tubular truss and rectangular concrete filled steel tubular trusses stiffened with PBL (β=0.5, 0.75 and 0.875) in overall deformation of truss are 33.43%, 24.44%, 23.69% and 21.44% respectively. The convex deformation of main pile at the region of tension branch pipe is effectively limited by PBL. The proportion of joint in overall deformation of truss deformation decreases, and the bearing capacity of joint is improved. The PBL has no effect on the deformation of main pile at the region of compression branch pipe. For the rectangular concrete filled steel tubular truss bridge and rectangular concrete filled steel tubular truss bridge stiffened with PBL, the limiting value of vertical deflection is 1/500 of truss overall length according to Specifications for Design of Highway Steel Bridge(JTG D64—2015).

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备注/Memo

备注/Memo:
更新日期/Last Update: 2017-09-11