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(1 許昌學(xué)院土木工程學(xué)院， 許昌 461000； 2 昆明理工大學(xué)建筑工程學(xué)院， 昆明 650224)
［摘要］為研究腹板開洞連續(xù)組合梁的塑性性能，對5根腹板開洞連續(xù)組合梁和1根腹板無洞連續(xù)組合梁進(jìn)行了試驗(yàn)研究與非線性有限元分析。研究重點(diǎn)為組合梁荷載彎矩曲線、塑性區(qū)形成及鋼梁底部縱向應(yīng)變分布規(guī)律等。結(jié)果表明：與腹板無洞組合梁相比，洞口的存在使組合梁較早進(jìn)入塑性并發(fā)生顯著的內(nèi)力重分布，中間支座彎矩減小，各跨跨中彎矩明顯增大，從而造成中間支座處的塑性應(yīng)變區(qū)域發(fā)展不如各跨跨中充分。
［關(guān)鍵詞］連續(xù)組合梁； 腹板開洞； 縱向應(yīng)變； 塑性性能； 有限元
中圖分類號(hào)：TU375-1文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：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
*河南省教育廳高等學(xué)校重點(diǎn)科研項(xiàng)目(17A560026),國家自然科學(xué)基金項(xiàng)目(51268022)。
作者簡介：李龍起,博士,講師, Email: lilongqiqingdao@sina.com。
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