预制管混凝土柱受压性能及节点试验研究
发布时间：2018-11-25 19:58
【摘要】：预制管混凝土柱主要由外层高强度混凝土预制管和核心现浇混凝土组成,预制管在工厂规模化生产,施工现场经吊装后,浇筑预制管内核心混凝土。预制管混凝土柱组合材料相同,协同工作性能好,预制管即充当核心混凝土模板又是重要的承载力部分,新型预制管混凝土柱节点形式实现了预制管与梁紧密连接,核心现浇混凝土的存在又能改善预制框架体系整体性能不足的特点,可以说预制管混凝土柱是一种本着施工快速化、结构高性能而产生的新型预制组合体系。 本文针对新型预制管混凝土柱结构展开了以下研究工作： 1、预制管混凝土柱粘结性能分析。利用新老混凝土粘结相关知识,结合预制管混凝土柱的自身特点,从理论上分析了预制管与核心混凝土的粘结问题。 2、预制管混凝土柱轴压性能试验研究。通过10根方形截面预制管混凝土和10根圆形截面预制管混凝土轴压试验,分析了预制管混凝土柱轴压破坏性能及荷载-应变规律,结果表明预制管混凝土柱具有可靠的轴压性能。并且根据混凝土本构模型,通过MATLAB软件,计算出了不同强度混凝土相互协调系数关系,提出了预制管混凝土柱轴压的极限承载力计算公式,结果表明该计算公式与试验值吻合较好。 3、预制管混凝土柱轴压性能和偏压性能数值模拟研究。分别通过MATLAB软件和有限元软件ABAQUS模拟了预制管混凝土柱的轴压和和偏压荷载-应变曲线,并通过有限元软件ABAQUS模拟分析了参数变化对预制管混凝土柱轴压和偏压性能的影响,通过分析更加透彻的揭示了预制管混凝土柱的轴压和偏压机理。 4、预制管混凝土柱结构抗震性能试验研究。透过3组不同位置的预制管混凝土柱结构抗震试验研究,对比分析了预制管混凝土柱结构抗震性能与普通混凝土柱抗震性能的差异,结果证明预制管混凝土柱结构具有较可靠的抗震性能。 5、预制管混凝土柱施工技术分析。参考现有的普通混凝土柱以及钢管混凝土柱结构的施工方法,结合预制管混凝土柱的自身特点,阐述了预制管混凝土柱结构的施工方法。
[Abstract]:Precast pipe concrete column is mainly composed of outer high strength concrete precast pipe and core cast-in-place concrete. Prefabricated pipe is produced on a large scale in the factory. After hoisting the construction site, the core concrete in the precast pipe is poured. Precast tubular concrete columns have the same composite materials and good cooperative working performance. Prefabricated pipes are not only the core concrete formwork but also an important bearing capacity part. A new type of precast tubular concrete column joints realize the close connection between prefabricated pipes and beams. The existence of the core cast-in-place concrete can also improve the characteristics of the whole performance of the precast frame system. It can be said that the precast tubular concrete column is a new type of prefabricated composite system produced by the rapid construction and high performance of the structure. In this paper, the following research work is carried out on the new precast tubular concrete column structure: 1, the bond behavior of the precast tubular concrete column is analyzed. Based on the knowledge of new and old concrete bonding and the characteristics of precast tubular concrete columns, the bond between precast pipe and core concrete is analyzed theoretically. 2. Experimental study on axial compression performance of precast tubular concrete columns. Through axial compression tests of 10 square section precast concrete tubes and 10 circular section precast pipe concrete columns, the axial compression failure behavior and load-strain law of precast tubular concrete columns are analyzed. The results show that prefabricated tubular concrete columns have reliable axial compression performance. Based on the concrete constitutive model and MATLAB software, the coordination coefficient of concrete with different strength is calculated, and the formula of ultimate bearing capacity of precast tubular concrete columns is put forward. The results show that the formula is in good agreement with the experimental data. 3. Numerical simulation of axial compression and biasing performance of precast tubular concrete columns. The axial and eccentric load-strain curves of precast tubular concrete columns were simulated by MATLAB software and finite element software ABAQUS, respectively. The influence of parameters on the axial compression and deflection of precast tubular concrete columns was analyzed by ABAQUS software. The mechanism of axial compression and deflection of precast tubular concrete columns is revealed more thoroughly through analysis. 4. Experimental study on seismic behavior of precast tubular concrete column structure. Through three groups of seismic tests of precast tubular concrete column structures in different positions, the difference between the seismic behavior of precast tubular concrete columns and that of ordinary concrete columns is compared and analyzed. The results show that the precast tubular concrete column structure has reliable seismic performance. 5. Construction technology analysis of precast pipe concrete column. Referring to the existing construction methods of ordinary concrete columns and concrete-filled steel tubular columns and combining with the characteristics of precast tubular concrete columns, the construction methods of precast tubular concrete columns are expounded.
【学位授予单位】：天津大学
【学位级别】：博士
【学位授予年份】：2013
【分类号】：TU37;TU317
本文编号：2357219
[Abstract]:Precast pipe concrete column is mainly composed of outer high strength concrete precast pipe and core cast-in-place concrete. Prefabricated pipe is produced on a large scale in the factory. After hoisting the construction site, the core concrete in the precast pipe is poured. Precast tubular concrete columns have the same composite materials and good cooperative working performance. Prefabricated pipes are not only the core concrete formwork but also an important bearing capacity part. A new type of precast tubular concrete column joints realize the close connection between prefabricated pipes and beams. The existence of the core cast-in-place concrete can also improve the characteristics of the whole performance of the precast frame system. It can be said that the precast tubular concrete column is a new type of prefabricated composite system produced by the rapid construction and high performance of the structure. In this paper, the following research work is carried out on the new precast tubular concrete column structure: 1, the bond behavior of the precast tubular concrete column is analyzed. Based on the knowledge of new and old concrete bonding and the characteristics of precast tubular concrete columns, the bond between precast pipe and core concrete is analyzed theoretically. 2. Experimental study on axial compression performance of precast tubular concrete columns. Through axial compression tests of 10 square section precast concrete tubes and 10 circular section precast pipe concrete columns, the axial compression failure behavior and load-strain law of precast tubular concrete columns are analyzed. The results show that prefabricated tubular concrete columns have reliable axial compression performance. Based on the concrete constitutive model and MATLAB software, the coordination coefficient of concrete with different strength is calculated, and the formula of ultimate bearing capacity of precast tubular concrete columns is put forward. The results show that the formula is in good agreement with the experimental data. 3. Numerical simulation of axial compression and biasing performance of precast tubular concrete columns. The axial and eccentric load-strain curves of precast tubular concrete columns were simulated by MATLAB software and finite element software ABAQUS, respectively. The influence of parameters on the axial compression and deflection of precast tubular concrete columns was analyzed by ABAQUS software. The mechanism of axial compression and deflection of precast tubular concrete columns is revealed more thoroughly through analysis. 4. Experimental study on seismic behavior of precast tubular concrete column structure. Through three groups of seismic tests of precast tubular concrete column structures in different positions, the difference between the seismic behavior of precast tubular concrete columns and that of ordinary concrete columns is compared and analyzed. The results show that the precast tubular concrete column structure has reliable seismic performance. 5. Construction technology analysis of precast pipe concrete column. Referring to the existing construction methods of ordinary concrete columns and concrete-filled steel tubular columns and combining with the characteristics of precast tubular concrete columns, the construction methods of precast tubular concrete columns are expounded.
【学位授予单位】：天津大学
【学位级别】：博士
【学位授予年份】：2013
【分类号】：TU37;TU317
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