基于修正拉-压杆模型的型钢混凝土深梁受剪承载力分析

邓明科; 马福栋; 李勃志; 梁兴文

doi:10.6052/j.issn.1000-4750.2016.08.0593

基于修正拉-压杆模型的型钢混凝土深梁受剪承载力分析

1.
西安建筑科技大学土木工程学院, 西安 710055;
2.
西安五和土木工程新材料有限公司, 西安 710055

基金项目: 国家自然科学基金项目（51578445）

详细信息

作者简介:
马福栋(1991-),男,山东平阴人,博士生,从事高性能土木工程材料与新型结构研究(E-mail:mafudongmfd@126.com);李勃志(1989-),男,山西运城人,硕士生,从事高性能土木工程材料与新型结构研究(E-mail:li_bo_zhi@126.com);梁兴文(1952-),男,陕西华县人,教授,硕士,从事建筑结构及抗震研究(E-mail:liangxingwen2000@163.com).

通讯作者:
邓明科(1979-),男,四川南充人,教授,工学博士,从事高性能土木工程材料与新型结构研究(E-mail:dengmingke@126.com).

中图分类号: TU398+9;TU317+.1
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出版历程
- 收稿日期: 2016-08-06
- 修回日期: 2017-03-30
- 刊出日期: 2017-12-24

ANALYSIS ON SHEAR CAPACITY OF SRC DEEP BEAMS BASED ON MODIFIED STRUT-AND-TIE MODEL

1.
College of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;
2.
Xi'an Wuhe Civil Engineering New Materials Co., LTD, Xi'an 710055, China

摘要

摘要: 在型钢混凝土深梁抗剪性能试验基础上，基于修正拉-压杆理论，考虑拉杆分力对受剪承载力的有利影响，采用型钢混凝土深梁的受压区高度作为上部节点高度，并对型钢翼缘和腹板进行合理简化，建立了型钢混凝土深梁的修正拉-压杆模型，推导了型钢混凝土深梁受剪承载力计算公式。将该文提出计算方法与ACI规范拉-压杆模型以及中国规范的计算方法进行比较可得：1）该文建立的修正拉-压杆模型，能较好反映型钢混凝土深梁的剪切传力机理和破坏模式，其受剪承载力计算值与试验结果吻合较好；2）采用JGJ 138-2001计算型钢混凝土深梁的受剪承载力偏低，离散性较大；按YB 9082-2006计算剪跨比大于2的构件受剪承载力偏于不安全。
- 型钢混凝土 /
- 深梁 /
- 修正拉-压杆模型 /
- 受剪承载力 /
- 剪跨比
Abstract: Based on the research of steel reinforced concrete (SRC) deep beam test and the modified strut-and-tie model (STM), a modified strut-and-tie model for SRC deep beams was established and the shear capacity design formula of SRC deep beams based on the model was deduced, which considers the favorable influences of the tie bar, taking the depth of compression zone of SRC deep beams as the depth of the top nodes and reasonably simplifying the steel flange and web. By comparing the test results and the calculation in this paper with the strut-and-tie models of ACI and Chinese code, the following conclusions can be drawn:1) force-transferring mechanism and failure mode can be reflected effectively, and the calculated values of shear capacity based on the modified strut-and-tie model for SRC deep beams presented in this paper agrees with the test result; 2) the shear capacity of SRC deep beams calculated by the JGJ 138-2001 shows high discreteness and low average value. The shear capacity of SRC deep beams with shear span ratios greater than 2 calculated by the YB 9082-2006 was not conservative.
- steel reinforced concrete /
- deep beams /
- modified strut-and-tie model /
- shear capacity /
- shear span ratio

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参考文献(16)

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基于修正拉-压杆模型的型钢混凝土深梁受剪承载力分析

通讯作者: 邓明科(1979-),男,四川南充人,教授,工学博士,从事高性能土木工程材料与新型结构研究(E-mail:dengmingke@126.com).

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ANALYSIS ON SHEAR CAPACITY OF SRC DEEP BEAMS BASED ON MODIFIED STRUT-AND-TIE MODEL

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通讯作者:
邓明科(1979-),男,四川南充人,教授,工学博士,从事高性能土木工程材料与新型结构研究(E-mail:dengmingke@126.com).