外包钢板—混凝土组合连梁及在剪力墙结构中的应用研究

发布时间：2018-02-21 00:26

本文关键词： 外包钢板-混凝土组合连梁拟静力试验有限元设计方法联肢剪力墙结构　出处：《清华大学》2014年博士论文　论文类型：学位论文

【摘要】：为了连接外包钢板-混凝土组合剪力墙，同时用于改善传统钢筋混凝土连梁延性不足的问题，作者提出了一种新型的外包钢板-混凝土组合连梁。本论文对外包钢板-混凝土组合连梁开展了系统、深入的研究，取得的主要研究成果如下：（1）模拟连梁在实际结构中的受力特征，对6个外包钢板-混凝土组合连梁试件进行了拟静力加载试验。试件的变化参数主要包括连梁的跨高比和钢板厚度。通过对试验结果的深入分析，得到了外包钢板-混凝土组合连梁的破坏机制、滞回特性、承载力、变形能力、刚度变化和承载力退化规律、耗能能力等。（2）提出了外包钢板-混凝土组合连梁的精细有限元建模方法，并对6个组合连梁试件和18个补充模型进行了有限元建模计算。采用试验数据分析和有限元分析相结合的方法，对外包钢板-混凝土组合连梁的传力和变形机理进行了深入研究，得到了组合连梁的外包钢板应力分布规律，混凝土中的应力传递规律，以及连梁的变形组成和各部分变形对连梁整体变形的贡献等。（3）基于外包钢板-混凝土组合连梁的传力机理，推导得到了组合连梁抗剪承载力的求解方程，并进一步建立了组合连梁抗剪承载力的简化计算公式。基于外包钢板-混凝土组合连梁的变形机理，提出了组合连梁的刚度分析方法，，并建立了组合连梁的刚度计算公式。提出了改进的墙肢与连梁的连接节点构造，用于改善联肢剪力墙结构的变形和耗能能力。（4）基于外包钢板-混凝土组合连梁的承载力和刚度计算方法，提出了组合连梁的截面恢复力模型，并开发了组合连梁的非线性梁单元模型。在此基础上提出了组合联肢剪力墙结构的建模方法。采用该有限元建模方法，对本文设计的一个组合联肢剪力墙结构进行了推覆分析，得到了组合联肢剪力墙结构在地震作用下的基本受力特点。本论文通过试验研究和有限元分析，得到了外包钢板-混凝土组合连梁的基本抗震性能和工作机理，同时提出了组合连梁的设计方法，开发了有限元模型，建立了组合联肢剪力墙结构的抗震分析方法。本论文获得国家科技支撑计划(2011BAJ09B01)、国家自然科学基金(51178246)资助。
[Abstract]:In order to connect the sheet-concrete composite shear wall and improve the ductility of traditional reinforced concrete beams, A new type of sheet-concrete composite connecting beam is proposed. In this paper, a systematic and in-depth study on the sheet-concrete composite connecting beam is carried out. The main research results are as follows:. 1) simulating the mechanical characteristics of the connecting beam in the actual structure, The quasi-static loading tests were carried out on six specimens of steel plate concrete composite connecting beams. The variation parameters of the specimens mainly included the ratio of span to height and the thickness of steel plates. The failure mechanism, hysteretic characteristics, bearing capacity, deformation capacity, stiffness change and the law of bearing capacity degradation and energy dissipation of steel plate concrete composite connecting beams are obtained. (2) the fine finite element modeling method of sheet-concrete composite connecting beam is put forward, and the finite element modeling calculation of 6 specimens and 18 supplementary models is carried out. The method of combining test data analysis with finite element analysis is used. In this paper, the stress transfer and deformation mechanism of sheet-concrete composite beam are studied, and the stress distribution law of steel plate and the stress transfer law in concrete are obtained. And the deformation composition of the connecting beam and the contribution of each part deformation to the whole deformation of the connected beam. (3) based on the force transfer mechanism of steel plate and concrete composite beams, the equation of shear bearing capacity of composite beams is derived. Furthermore, a simplified formula for calculating the shear capacity of composite beams is established. Based on the deformation mechanism of steel plate and concrete composite beams, the stiffness analysis method of composite connecting beams is proposed. The stiffness calculation formula of the combined beam is established, and an improved joint structure is proposed to improve the deformation and energy dissipation capacity of the shear-wall structure. 4) based on the calculation method of bearing capacity and stiffness of steel plate concrete composite connecting beam, the section restoring force model of composite connecting beam is put forward. The nonlinear beam element model of combined beam is developed. Based on this, the modeling method of combined shear wall structure is put forward. By using the finite element modeling method, a combined coupled shear wall structure designed in this paper is analyzed by push-over analysis. The characteristics of combined shear wall structure subjected to earthquake are obtained. Through experimental research and finite element analysis, the basic aseismic performance and working mechanism of steel plate concrete composite connecting beam are obtained, and the design method of composite connecting beam is put forward, and the finite element model is developed. The seismic analysis method of combined shear wall structure is established. This paper is supported by the National Science and Technology support Program 2011 BAJ 09B 01, National Natural Science Foundation of China 51178246.
【学位授予单位】：清华大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：TU398

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