吉林大学学报(工学版)

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灌浆方钢管压陷极限承载力试验

郑文忠,张格明,柳旭东,张博一   

  1. 哈尔滨工业大学 土木工程学院,哈尔滨 150090
  • 收稿日期:2006-07-11 修回日期:2006-09-23 出版日期:2007-07-01 发布日期:2007-07-01
  • 通讯作者: 郑文忠

Experiment on cave-in ultimate bearing capacity of grouted-square-steel tube

Zheng Wen-zhong,Zhang Ge-ming,Liu Xu-dong,Zhang Bo-yi   

  1. School of Civil Engineering, Harbin Institute of Technology,150090 Harbin
  • Received:2006-07-11 Revised:2006-09-23 Online:2007-07-01 Published:2007-07-01
  • Contact: Zheng Wen-zhong

摘要: 针对目前灌浆弦杆压陷极限承载力公式没有考虑弦杆轴力对节点压陷承载力的影响的不足,对15个灌浆方钢管进行了压陷承载力试验,考察了支杆与弦杆边长比、弦杆所受轴力的性质与大小等参数对灌浆方钢管压陷承载力的影响。计算机仿真试验除考察了模型试验所考察的参数之外,还考察了弦杆壁厚、水泥石强度、钢材强度等参数对灌浆方钢管压陷承载力的影响。在模型试验和仿真试验的基础上,分析了灌浆方钢管压陷机理,建立了灌浆方钢管压陷极限承载力计算公式,为推广内置钢桁架混凝土组合梁提供了依据。

关键词: 灌浆方钢管, 压陷极限承载力, 仿真试验, 模型试验

Abstract: For cavein failure mode is apt to occur in hollow steeltube joint. In order to avoid this kind of failure, chord is grouted to increase the cave-in bearing capacity. Experiment was carried out on cave-in bearing capacity of 15 groutedsquare-steel tube and influence of some factors on cave-in bearing capacity of grouted-square-steel tube was analyzed, such as ratio of length of branch tube to length of chord tube, characteristics and value of axial force acting on chord. In addition to these factors in model experiment, influence of factors such as thickness of chord's wall panel, strength of hardened grout and strength of chord steel was analyzed in simulated experiment. Based on model experiment and simulated experiment, mechanical properties of grouted-square-steel tube in cavein failure mode was analyzed and the formula of cave-in ultimate bearing capacity of grouted-square-steel tube was established. It can provide basic data for spreading encased steel truss-concrete composite beam.

Key words: grouted-square-steel tube, cave-in ultimate bearing capacity, simulated experiment, model test

中图分类号: 

  • TU378.1
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