- 摘 要
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（1 西南林業(yè)大學(xué)土木工程學(xué)院， 昆明 655024; 2 昆明理工大學(xué)建筑工程學(xué)院， 昆明 650224）
［摘要］為了研究負(fù)彎矩作用下腹板開洞鋼-混凝土組合梁的極限承載力及相關(guān)受力性能，對4根組合梁試件進(jìn)行了試驗研究和有限元分析。結(jié)果表明，負(fù)彎矩作用下的組合梁腹板開洞后，其剛度和承載力明顯降低，洞口區(qū)域應(yīng)變不再符合平截面假定；通過增加混凝土板厚度可以提高其承載力；混凝土翼板對負(fù)彎矩區(qū)腹板開洞組合梁的抗剪承載力有很大的貢獻(xiàn)；洞口形狀對其受力性能有較大的影響。
［關(guān)鍵詞］組合梁； 腹板開洞； 負(fù)彎矩作用； 有限元分析； 極限承載力
中圖分類號：TU 398-9文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2017)04-0012-05
Experimental research and finite element analysis on mechanical behavior of composite beams with web opening under negative moment
Liao Wenyuan1, Zhou Donghua2, Liu Dewen1
(1 College of Civil Engineering, Southwest Forestry University, Kunming 655024, China；
2 College of Construction Engineering, Kunming University of Science and Technology, Kunming 650224, China)
Abstract:In order to investigate the ultimate bearing capacity and relevant mechanical behavior of steel-concrete composite beams with web opening under negative moment, four composite beams were tested and finite element analyses were conducted. The results indicate that the stiffness and ultimate bearing capacity reduce greatly after opening holes in web of composite beam under negative moment and the opening area strain does not fulfill plane hypothesis. Increasing the thickness of concrete slab can improve its bearing capacity. Concrete flange makes a great contribution to shear capacity of composite beams with web opening in negative moment area and the shape of opening has a notable influence on its mechanical behavior.
Keywords:composite beam; web opening; negative moment; finite element analysis; ultimate bearing capacity
*國家自然科學(xué)基金項目（51268022），國家青年科學(xué)基金項（51308269）。
作者簡介: 廖文遠(yuǎn)，博士，講師，Email: lwy065@126.com。
