預(yù)制管混凝土柱受壓性能及節(jié)點(diǎn)試驗(yàn)研究
[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.
【學(xué)位授予單位】:天津大學(xué)
【學(xué)位級(jí)別】:博士
【學(xué)位授予年份】:2013
【分類(lèi)號(hào)】:TU37;TU317
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