外包发泡混凝土帽钢龙骨组合墙体抗侧性能试验研究和分析

发布时间：2018-04-17 00:16

本文选题：发泡混凝土 + 帽钢龙骨　；参考：《武汉理工大学学报》2016年12期

【摘要】：以帽型截面(简称帽钢)钢立柱组成的轻钢龙骨和发泡混凝土共同构成的组合墙体为对象,研究帽钢龙骨组合墙体抗侧承载力。组合墙体试件为两堵,高、宽、厚均为3.0 m×1.8 m×0.2 m,由LC3.0发泡混凝土和4根间距为600 mm的帽钢立柱及横穿柱顶的矩形钢管共同构成,帽钢立柱厚度含1.2 mm和1.5 mm两种,其中后者翼缘上开孔。结果表明:组合墙体在水平荷载作用下将产生多条沿墙体对角线分布的裂缝;当帽钢立柱上开孔时,这些斜裂缝遇到帽钢立柱时仍会沿原方向延伸;而对于未开孔的墙体,这些斜裂缝遇到帽钢立柱时会改变方向沿立柱纵向延伸。组合墙体试件的荷载-水平位移关系曲线均由弹性阶段、弹塑性阶段和塑性阶段构成。而当组合墙体处于弹性阶段时,帽钢立柱的作用并不大,主要是发泡混凝土抵抗外荷载。组合墙体的塑性阶段延续较长,有较高的延性和良好的抗震性能。当帽钢立柱的翼缘上开孔时,组合墙体的荷载-水平位移曲线与不开孔的情况相比更为连续和光滑。增加帽钢立柱的厚度对增大组合墙体的抗侧承载力并没有明显的影响。在进行有限元建模时,把帽钢龙骨和发泡混凝土分别简化为壳单元和密排框架,所得墙体抗侧极限承载力与试验数据十分吻合,是正确和合理的。
[Abstract]:Taking the composite wall composed of light steel keel and foamed concrete as the object, the lateral bearing capacity of cap steel steel composite wall is studied.The composite wall specimens are composed of two specimens, which are 3.0m 脳 1.8m 脳 0.2m in height, width and thickness of 3.0m 脳 1.8m 脳 0.2m. they are composed of LC3.0 foamed concrete, four cap steel columns with a spacing of 600mm and rectangular steel pipes crossing the top of the columns. The thickness of the cap steel columns consists of 1.2mm and 1.5mm in thickness.The latter flange has an upper hole.The results show that there will be many cracks distributed diagonally along the wall under horizontal load. When the cap steel column is perforated, these oblique cracks will still extend along the original direction.When these oblique cracks meet the cap steel column, they will change direction and extend along the column longitudinally.The load-horizontal displacement curves of composite wall are composed of elastic stage, elastic-plastic stage and plastic stage.When the composite wall is in the elastic stage, the cap steel column has little effect, mainly foaming concrete to resist the external load.The plastic stage of the composite wall is longer, with high ductility and good seismic performance.When the upper flange of cap steel column is perforated, the load-horizontal displacement curve of composite wall is more continuous and smooth than that of non-perforated wall.Increasing the thickness of cap steel column has no obvious effect on the lateral bearing capacity of composite wall.In the finite element modeling, the cap steel keel and foamed concrete are simplified to shell element and dense frame respectively. The ultimate bearing capacity of the wall is in good agreement with the experimental data, which is correct and reasonable.
【作者单位】：武汉理工大学土木工程与建筑学院;
【基金】：湖北省科技支撑项目(2014BAA122) 2015年度湖北省建设科技项目计划
【分类号】：TU398.9

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