冷弯薄壁C型钢桁架组合楼盖抗弯性能研究

发布时间：2018-12-15 11:05

【摘要】：随着我国建筑产业化的不断发展,低层冷弯薄壁型钢住宅体系应用日益广泛,各种新型结构体系应运而生,带动了组合楼盖体系的研究和改进。本文研究的依托实际工程的冷弯薄壁C型钢桁架组合楼盖,目前相关研究较少,需要通过试验和有限元分析方法了解其抗弯性能,本文主要开展以下研究工作:(1)进行了3个冷弯薄壁C型钢桁架-压型钢板混凝土组合楼盖试件和1个冷弯薄壁C型钢桁架-ALC板组合楼盖试件的抗弯性能试验,详细考察了这4个组合楼盖的承载能力和破坏形式,研究了荷载-挠度关系曲线和荷载-应变关系曲线,研究参数为有无抗剪连接件、节点连接强度、楼面板形式。(2)采用有限元软件ABAQUS建立冷弯薄壁C型钢桁架-压型钢板混凝土组合楼盖的计算模型,进行有限元模拟分析,将分析结果与试验结果相比较,验证了有限元分析模型的正确性和准确性。(3)建立有限元分析模型,对组合楼盖下部钢桁架梁的跨高比、高厚比、钢材屈服强度、混凝土强度等级等因素进行参数分析,确定影响冷弯薄壁C型钢桁架组合楼盖承载能力的主要因素。(4)参考现有研究理论,在试验和有限元分析基础上,提出冷弯薄壁C型钢桁架组合楼盖挠度修正公式。
[Abstract]:With the continuous development of building industrialization in our country, the application of low-rise cold-formed thin-walled steel residential system is more and more extensive, and various new structural systems emerge as the times require, which leads to the research and improvement of composite floor system. In this paper, the cold-formed thin-walled steel truss composite floor based on practical engineering is studied, but there are few related researches at present, so it is necessary to understand its flexural performance by means of test and finite element analysis. The main work of this paper is as follows: (1) three cold-formed thin-walled steel truss-profiled steel and concrete composite floor specimens and one cold-formed thin-walled steel truss-ALC plate composite floor specimens have been tested. The load-bearing capacity and failure form of the four composite floors are investigated in detail. The load-deflection relation curve and load-strain relationship curve are studied. (2) the calculation model of cold-formed thin-walled steel truss-concrete composite floor is established by using finite element software ABAQUS, and the finite element simulation analysis is carried out, and the results are compared with the experimental results. The correctness and accuracy of the finite element analysis model are verified. (3) the finite element analysis model is established to analyze the ratio of span to height, the ratio of height to thickness, the yield strength of steel, the grade of concrete strength and so on. The main factors affecting the bearing capacity of cold-formed thin-walled steel truss composite floor are determined. (4) based on the experimental and finite element analysis, the deflection correction formula of cold-formed thin-walled steel truss composite floor is put forward.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU392.1

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