(1 许昌学院土木工程学院， 许昌 461000； 2 昆明理工大学建筑工程学院， 昆明 650224)

［摘要］为研究腹板开洞连续组合梁的塑性性能，对5根腹板开洞连续组合梁和1根腹板无洞连续组合梁进行了试验研究与非线性有限元分析。研究重点为组合梁荷载弯矩曲线、塑性区形成及钢梁底部纵向应变分布规律等。结果表明：与腹板无洞组合梁相比，洞口的存在使组合梁较早进入塑性并发生显著的内力重分布，中间支座弯矩减小，各跨跨中弯矩明显增大，从而造成中间支座处的塑性应变区域发展不如各跨跨中充分。

［关键词］连续组合梁； 腹板开洞； 纵向应变； 塑性性能； 有限元

中图分类号：TU375-1文献标识码：A文章编号：1002-848X(2017)02-0053-04

Experimental research and finite element analysis on plastic properties of continuous steel-concrete composite beams with web openings

Li Longqi1, Wang Jun1, Yang Zhenzhen1, Zhou Donghua2 , Kong Yamei1

(1 School of Civil Engineering, Xuchang University, Xuchang 461000, China；2 School of Civil Engineering, Kunming University of Science and Technology, Kunming 650224, China)

Abstract:Experimental studies and non-linear finite element analyses were conducted on five continuous composite beams with web openings and one continuous composite beams without web openings, in order to investigate the plastic properties of continuous composite beams with wed openings. The research focuses were load-moment curves of composite beams, formation of the plastic zone of composite beams and distribution law for longitudinal strain at the bottom of steel beams. The results show that compared with the composite beams without web openings, the existence of the openings makes composite beams enter the plastic stage earlier and occur significant internal force redistribution. Bending moment at intermediate bearing reduces and mid-span bending moment of each spanning increases, resulting in the less developed plastic strain region of intermediate bearing than that at mid-span of each spanning.

Keywords:continuous composite beam; web opening; longitudinal strain; plastic property; finite element

*河南省教育厅高等学校重点科研项目(17A560026),国家自然科学基金项目(51268022)。

作者简介：李龙起,博士,讲师, Email: lilongqiqingdao@sina.com。