薄钢板覆面冷弯薄壁型钢墙体抗剪性能研究

发布时间：2018-07-16 07:57

【摘要】：冷弯薄壁型钢墙体以其自重轻、耐火性能好、绿色环保、抗震性能强等优势在国外发展迅猛,该类墙体主要由冷弯薄壁型钢框架和墙面板通过自攻螺钉连接而成。其中,采用薄钢板作为墙体覆面板在国内的研究刚刚开始,成果相对较少。为推广冷弯薄壁型钢组合墙体在中国的发展,进行了薄钢板覆面冷弯薄壁型钢墙体连接性能试验和有限元分析;对国内外墙体抗剪承载力公式进行了分析、比较、验证。具体工作内容如下:(1)制作了11组覆面板与薄壁型钢立柱的连接试件,进行了试验,分析了螺钉间距、波纹板尺寸、波纹形状等对于试件的连接性能的影响。试验结果表明:试件的抗拉承载力和初始刚度随着螺钉间距的减小而增大;对于波纹板覆面试件,波纹间距增大,试件初始刚度减小;随着荷载增加,波纹逐渐被拉平,试件刚度变大,波纹钢板试件在极限承载力下,试件刚度相近;波纹类型对试件抗拉承载力影响不大。(2)基于薄钢板覆面冷弯薄壁型钢墙体进行了数值模拟,分析改变不同参数对组合墙体抗剪性能的影响。模拟结果表明:减小自攻螺钉的间距、增大立柱的厚度、减小立柱间距,以及增大立柱的强度均可以明显提高墙体的抗剪承载力;而增大薄钢板的强度对薄钢板覆面冷弯薄壁型钢墙体的抗剪承载力的影响不大;1:1覆面板尺寸的墙体抗剪承载力高于2:1覆面板尺寸的墙体抗剪承载力;无论墙体尺寸比例如何改变,纵向波纹墙体抗剪承载力均好于横向波纹墙体抗剪承载力。(3)介绍了国内外墙体抗剪承载力公式的理论推导的四种方法,对其进行了验证研究。结果表明:有效条带法能较好的与模拟和试验结果相吻合;针对整体分析法及剪力流方法中,覆面板材为薄钢板,给出了建议的修正系数值。
[Abstract]:The cold-formed thin-walled steel wall has developed rapidly in foreign countries because of its advantages of light weight, good fire resistance, green environmental protection and strong seismic performance. This kind of wall is mainly composed of cold-formed thin-walled steel frames and wall panels connected by self-tapping screws. Among them, the use of thin steel plate as the wall overlay in the domestic research has just begun, the results are relatively small. In order to popularize the development of cold-formed thin-walled composite wall in China, the connection performance test and finite element analysis of cold-formed thin-walled steel wall with thin steel sheet overlay are carried out, and the formulas of shear bearing capacity of wall at home and abroad are analyzed, compared and verified. The main contents are as follows: (1) 11 groups of connecting specimens of overlay panel and thin-walled steel column were made, and the effects of screw spacing, corrugated plate size and corrugated shape on the joint properties of the specimens were analyzed. The test results show that the tensile capacity and initial stiffness of the specimens increase with the decrease of the screw spacing; for the corrugated plate interview parts, the corrugated spacing increases and the initial stiffness decreases; with the increase of load, the corrugation is gradually flattened. The stiffness of the specimen becomes larger, and the stiffness of the corrugated steel plate is similar to that of the specimen under the ultimate bearing capacity, and the type of corrugation has little effect on the tensile capacity of the specimen. (2) based on the cold-formed thin-walled steel wall with thin steel plate overlay, the numerical simulation is carried out. The influence of different parameters on shear resistance of composite wall is analyzed. The simulation results show that reducing the spacing of tapping screws, increasing the thickness of columns, decreasing the spacing of columns and increasing the strength of columns can obviously improve the shear capacity of the wall. However, increasing the strength of thin steel plate has little effect on the shear capacity of the cold-formed thin-walled steel wall with 1: 1 panel size, which is higher than that of the wall with 2:1 panel size. The shear bearing capacity of longitudinal corrugated wall is better than that of transverse corrugated wall no matter how the wall size ratio changes. (3) four methods of theoretical derivation of shear bearing capacity formula are introduced and verified. The results show that the effective strip method is in good agreement with the simulation and test results, and the suggested correction coefficient is given for the laminated plate in the global analysis method and the shear flow method.
【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU392.1

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