冷弯薄壁型钢轻混凝土组合墙体抗弯性能有限元分析  

Finite Element Analysis on Flexural Behavior of Cold-formed Thin-wall Steel Framing Walls Infilled with Lightweight Concrete

作　　者：李国华[1] 王权 董军[1] 狄彦强 LI Guohua;WANG Quan;DONG Jun;DI Yanqiang(Beijing Higher Institution Engineering Research Center of Structural Engineering and New Materials,Beijing University of Civil Engineering and Architecture,Beijing,China,100044;China Building Technique Group Co.Ltd.,Beijing,China,100013)

机构地区：[1]北京建筑大学工程结构与新材料北京市高等学校工程研究中心,北京100044 [2]中国建筑技术集团有限公司,北京100013

出　　处：《沈阳建筑大学学报（自然科学版）》2021年第2期218-226,共9页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家重点研发计划项目(2017YFC0702900)。

摘　　要：目的研究冷弯薄壁型钢轻混凝土组合墙体抗弯性能,为该类墙体的设计和工程应用提供参考。方法应用有限元软件ABAQUS建立精细化组合墙体模型,在数值模拟与试验结果吻合的基础上,分析钢材屈服强度、竖肋数量、横肋数量、轻质混凝土强度、螺钉间距等参数对冷弯薄壁型钢轻混凝土组合墙体抗弯性能的影响。结果随着钢材屈服强度、轻质混凝土强度的提高,竖肋数量的增加,冷弯薄壁型钢轻混凝土组合墙体抗弯承载力明显增加;墙体的变形随着横肋数量的增多而减小。当螺钉间距在300 mm以下时,减小螺钉间距对提高组合墙体抗弯承载力影响不大,但墙体的变形随着螺钉间距的增大而增大;当螺钉间距大于300 mm时,减小螺钉间距可明显提高墙体的抗弯承载力。结论提高冷弯薄壁型钢的屈服强度和轻质混凝土强度、适当增加竖肋数量与减小螺钉间距能显著提高冷弯薄壁型钢轻混凝土组合墙体的抗弯性能。In order to provide references for the design and engineering application of cold-formed thin-wall steel framing walls infilled with lightweight concrete,the flexural behavior of the type of wall was studied.The finite element software ABAQUS was used to establish the refined model.On the basis of the anastomosis between the numerical simulation and the experimental results,the influence of parameters on the flexural behavior of cold-formed thin-walled steel framing walls infilled with lightweight concrete was analyzed,such as the steel yield strength,the number of vertical ribs,the number of transverse ribs,the strength of lightweight concrete and the spacing of screws.With the increase of the steel yield strength,lightweight concrete strength,the number of vertical ribs,the flexural capacity of cold-formed thin-wall steel framing walls infilled with lightweight concrete increases obviously.The deformation of the wall decreases as the number of transverse ribs increases.When the screw spacing is below 300 mm,reducing the screw spacing has little effect on improving the flexural capacity of the composite wall,but the deformation of the wall increases with the increase of the screw spacing.When the screw spacing is greater than 300mm,decreasing the screw spacing can improve the flexural capacity of the wall obviously.The results show that changing parameters can improve the flexural behavior of cold-formed thin-wall steel framing walls infilled with lightweight concrete obviously,such as increasing the yield strength of cold-formed thin-wall steel,the strength of lightweight concrete,the number of vertical ribs and reducing the screw spacing appropriately.

关 键 词：冷弯薄壁型钢 轻质混凝土 组合墙体 抗弯性能 有限元 

分 类 号：TU398.1[建筑科学—结构工程]