负弯矩下钢-混凝土蜂窝组合梁力学性能研究  

Research on Mechanical Properties of Steel-Concrete Honeycomb Composite Beam under Negative Bending Moment

作　　者：贾连光[1] 唐康 焦禹铭 孙博文 JIA Lianguang;TANG Kang;JIAO Yuming;SUN Bowen(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168)

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2020年第5期769-778,共10页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(51578346)。

摘　　要：目的研究负弯矩及弯剪作用下钢-混凝土蜂窝组合梁的破坏形态,分析不同参数对蜂窝组合梁力学性能的影响.方法在集中荷载作用下对一根蜂窝组合梁和一根蜂窝梁进行静力试验,研究在负弯矩和剪力共同作用下,钢-混凝土蜂窝组合梁的受力状态和破坏模态.以蜂窝组合梁静力性能试验为基础,建立有限元模型,将模拟结果与试验结果对比以验证模型合理性,进而研究腹板高厚比、翼缘宽厚比以及是否设置混凝土板等影响因素对蜂窝组合梁受力性能的影响.结果设置混凝土板,对于蜂窝组合梁负弯矩下的承载力有相应的提高,混凝土板对承载力的贡献为7%左右;在混凝土板受拉情况下,减小腹板高厚比和翼缘宽厚比对蜂窝组合梁的承载力均有提高,增大钢筋纵向配筋率可以提高蜂窝组合梁的开裂荷载.结论腹板高厚比、翼缘宽厚比以及混凝土板纵向配筋率对蜂窝组合梁力学性能均有明显影响,设置混凝土板可以小幅提高组合梁承载力.The failure modes of steel-concrete honeycomb composite beams under the action of negative bending moment and bending shear are studied.The effects of different parameters on mechanical properties of honeycomb composite beams are analyzed.The static tests of a honeycomb composite beam and a honeycomb beam under concentrated load were carried out to study the stress state and failure mode of the steel-concrete honeycomb composite beam under the action of negative bending moment and shear force.Based on the static performance test of honeycomb composite beam,the finite element model was established,and the simulation results were compared with the test results to verify the rationality of the model,and then the influences of factors such as the height to thickness ratio of web,the width to thickness ratio of flange and whether to set concrete slabs on the mechanical performance of honeycomb composite beam were studied.The bearing capacity of honeycomb composite beam under negative bending moment was improved by setting concrete slab,and the contribution of concrete slab to bearing capacity was about 7%.In the case of concrete slabs under tension,the bearing capacity of honeycomb composite beams can be improved by reducing the ratio of web height to thickness and the ratio of flange width to thickness,and the cracking load of honeycomb composite beams can be increased by increasing the ratio of longitudinal reinforcement.The ratio of web height to thickness,the ratio of flange width to thickness and the ratio of longitudinal reinforcement of concrete slabs have obvious effects on the mechanical properties of honeycomb composite beams.

关 键 词：蜂窝组合梁 负弯矩 静力试验 腹板高厚比 有限元模拟 

分 类 号：TU391[建筑科学—结构工程]