工程力学 ›› 2019, Vol. 36 ›› Issue (8): 182-191.doi: 10.6052/j.issn.1000-4750.2018.07.0428

• 土木工程学科 • 上一篇    下一篇

钢管高强混凝土叠合构件受剪承载能力试验研究

杨勇, 孙东德, 张超瑞, 薛亦聪, 陈阳, 于云龙   

  1. (西安建筑科技大学土木工程学院, 西安 710054
  • 收稿日期:2018-07-29 修回日期:2019-01-08 出版日期:2019-08-25 发布日期:2019-08-10
  • 通讯作者: 孙东德(1995-),男,山东东营人,硕士生,从事组合结构研究(E-mail:sdd1513@outlook.com). E-mail:sdd1513@outlook.com
  • 作者简介:杨勇(1976-),男,江西吉安人,教授,工学博士,博导,从事组合结构研究(E-mail:yyhhp2004@163.com);张超瑞(1991-),男,山东商河人,工程师,工学硕士,从事组合结构研究(E-mail:zcr732014@163.com);薛亦聪(1992-),男,陕西西安人,博士生,从事组合结构研究(E-mail:xjdxyc@foxmail.com);陈阳(1992-),女,陕西渭南人,博士生,从事组合结构研究(E-mail:xauatchenyang@126.com);于云龙(1989-),男,陕西西安人,工程师,工学博士,从事组合结构研究(E-mail:yyllyp126@sina.com)
  • 基金资助:
    国家自然科学基金项目(51578443);陕西省科学研究计划项目(2011kjxx42);西安市科技计划项目(CXY1432(5))

EXPERIMENTAL STUDY ON SHEAR CAPACITY OF RC MEMBERS WITH PREFABRICATED HIGH-STRENGTH CONCRETE FILLED STEEL TUBE CORE

YANG Yong, SUN Dong-de, ZHANG Chao-rui, XUE Yi-cong, CHEN Yang, YU Yun-long   

  1. Department of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an 710054, China
  • Received:2018-07-29 Revised:2019-01-08 Online:2019-08-25 Published:2019-08-10

摘要: 结合3个普通钢筋混凝土构件和11个钢管高强混凝土叠合构件的单调加载静力试验,对钢管高强混凝土叠合构件的破坏形态、破坏机理和受剪承载能力开展研究。通过分析破坏特征与荷载-跨中挠度曲线,重点对钢管尺寸、剪跨比和是否焊接栓钉对叠合构件受剪承载力的影响进行分析。试验研究结果表明:试件发生剪切斜压和剪压两种破坏模式;试件的受剪承载力随钢管尺寸的增加而提高;随剪跨比的增大而降低;焊接栓钉可提高试件的承载能力,但作用有限。依据现有规范并结合试验结果,基于桁架-斜压场模型提出了钢管高强混凝土叠合构件的受剪承载力计算公式,其计算结果与试验结果吻合较好。

关键词: 钢管混凝土叠合构件, 高强混凝土芯柱, 受剪承载力, 试验研究, 桁架-斜压场模型

Abstract: Based on the cyclic loading experiments of three RC members and eleven encased CFST members with a prefabricated high-strength concrete filled steel tube core, the failure pattern, failure modes and shear bearing capacity of the members were thoroughly investigated. On the basis of the failure characteristic and the measured load-deflection curves, the effects of steel tube size, shear span ratio and welding studs on the shear bearing capacity of the members were critically examined. The results indicated that the specimens suffered diagonal-compression failure and shear-compression failure. The shear capacities increased with the increases of aspect ratio, and it was effective to improve the shear capacity by welding studs. Based on the existing specification and test results, truss-arch theory was applied here to analyze the shear capacity of the members. The results obtained from the proposed method agree well with those of pertinent experiments.

Key words: encased concrete filled steel tube members, high-strength concrete core, shear capacity, experimental study, truss-arch model

中图分类号: 

  • TU398
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