负弯矩作用下蜂窝组合梁的承载力

doi:10.12141/j.issn.1000-565x.180125

华南理工大学学报（自然科学版） ›› 2019, Vol. 47 ›› Issue (1): 75-85.doi: 10.12141/j.issn.1000-565x.180125

负弯矩作用下蜂窝组合梁的承载力

马宏伟¹ 刘维亚² 林朗¹ 袁嘉樑¹

1．华南理工大学亚热带建筑科学国家重点实验室，广东广州 510640; 2．深圳千典建筑与工程设计顾问有限公司，广东深圳 518042

收稿日期:2018-03-21 修回日期:2018-09-24 出版日期:2019-01-25 发布日期:2018-12-01
通信作者: 马宏伟( 1973) ，男，博士，副教授，主要从事钢结构和组合结构研究． E-mail:hwma@scut.edu.cn
作者简介:马宏伟( 1973) ，男，博士，副教授，主要从事钢结构和组合结构研究．
基金资助:
亚热带建筑科学国家重点实验室开放基金资助项目( 2018ZB29)

Experimental Study on the Bending Capacity of Castellated Composite Beam Under Negative Moment

MA Hongwei¹ LIU Weiya² LIN Lang¹ YUAN Jialiang¹

1． State Key Laboratory of Subtropical Building Science，South China University of Technology，Guangzhou 510640，Guangdong， China; 2． Shenzhen Qiandian Architectural ＆ Engineering Consult Co．，Ltd．，Shenzhen 518053，Guangdong，China

Received:2018-03-21 Revised:2018-09-24 Online:2019-01-25 Published:2018-12-01
Contact: 马宏伟( 1973) ，男，博士，副教授，主要从事钢结构和组合结构研究． E-mail:hwma@scut.edu.cn
About author:马宏伟( 1973) ，男，博士，副教授，主要从事钢结构和组合结构研究．
Supported by:
Supported by the State Key Laboratory of Subtropical Building Science( 2018ZB29)

摘要/Abstract

摘要： 蜂窝组合梁能降低建筑层高，为了研究蜂窝组合梁负弯矩区段承载力，设计了两个蜂窝组合梁试件，并进行了静力加载试验，研究了扩张比、第一洞口间距对蜂窝组合梁的强度、刚度和破坏模式的影响．试验结果表明:对于扩张比小于1． 3 的试件，蜂窝组合梁在近支座截面或第一洞口中心截面发生弯曲破坏;在扩张比给定的情况下，蜂窝组合梁的第一洞口间距主要影响蜂窝组合梁的破坏模式; 当近支座截面和第一洞口截面同时为蜂窝组合梁的破坏控制截面时，钢梁扩张比对蜂窝组合梁的强度与刚度影响较大．在试验研究的基础上提出了近支座截面的名义抗弯承载力计算方法，该方法同时考虑了构件的破坏模式与两个控制截面的抗弯承载力，公式计算值与试验值吻合．

关键词: 蜂窝组合梁, 负弯矩作用, 扩张比, 抗弯承载力, 弯曲破坏

Abstract: Castellated composite beam can decrease the floor height of buildings． In order to investigate the bending capacity of castellated composite beam under negative moment，two cantilever beam specimens were designed and tested by applying static loads． The influences of the expansion ratio and location of first web opening on beam mechanical behavior were studied． The results show that bending failures of the specimens occur near the beam support section or the first web opening section for the specimens with the expansion ratio no larger than 1. 3． When the expansion ratio of specimens is maintained unchanged，the location of the first web opening mainly affects on the failure mode of the beam． For both the beam support section and the first web opening section being the strength control section，the expansion ratio of specimens have greatly effect on the strength and stiffness of the beam． Considering both the failure modes and the flexural capacity of two control sections，the method calculating the nominal bending capacity of the castellated composite beam near the support section were presented，and the calculated values fit well with the experimental ones．

Key words:

castellated composite beam, negative moment, expansion ratio, bending capacity, bending failure

中图分类号:

TU398.9

马宏伟刘维亚林朗袁嘉樑. 负弯矩作用下蜂窝组合梁的承载力 [J]. 华南理工大学学报（自然科学版）, 2019, 47(1): 75-85.

MA Hongwei LIU Weiya LIN Lang YUAN Jialiang.

Experimental Study on the Bending Capacity of Castellated Composite Beam Under Negative Moment

[J]. Journal of South China University of Technology (Natural Science Edition), 2019, 47(1): 75-85.

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负弯矩作用下蜂窝组合梁的承载力

Experimental Study on the Bending Capacity of Castellated Composite Beam Under Negative Moment

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