基于ABAQUS的T型截面鋼管混凝土異形柱抗震性能研究
[Abstract]:The cross section of special-shaped frame columns commonly used in practical structures consists of three types: T-type and cross-type. Compared with the brick concrete structure, the weight of the structure is obviously reduced, which is suitable for the high-rise building. In addition, compared with the common frame or frame shear structure, the traditional rectangular column protruding wall is avoided, which affects the beauty of the building and increases the building area at the same time. In addition, the wall adopts insulation, heat insulation, light, efficient materials, conforming to the major direction of the contemporary construction industry. In concrete-filled steel tubular columns, the internal concrete is subjected to lateral compression and its bearing capacity is greatly improved due to the constraint effect imposed by the steel tube wrapped on the outer side. The support of concrete increases the stability of steel pipe and avoids local buckling. Its ductility and energy dissipation characteristics may also be improved. However, considering the complex force of members in practical engineering, the research on deformation and failure characteristics of concrete-filled steel tubular (CFST) special-shaped column joints is limited, which needs further study. Through studying the action mechanism of concrete-filled steel tubular (CFST) members and understanding some related requirements of T-shaped columns, the numerical analysis model of T-shaped columns' Liang Zhu joints is established by synthetically analyzing the characteristics of nonlinear finite element analysis software (ABAQUS). Four steel tubes are arranged in the column with a height of 2.9 m and a beam length of 2.65 m.T. the steel tubes are connected with a 6 mm thick plate, the bottom of the column is hinged and the end of the beam is linked with a link rod. Apply horizontal load in different directions according to different axial compression. The equivalent plastic strain diagram and load-displacement curve of the members are obtained by using the calculated results. The load-carrying capacity, deformation performance, ductility and energy dissipation capacity of the members under different conditions are compared and analyzed. The results show that the interaction between the steel tube and the core concrete greatly improves the bearing capacity of the members. Under cyclic loading, the hysteretic curves of T-shaped columns are full, and the energy dissipation performance of the components is better. The influence of axial compression ratio on concrete deformation of T-shaped column body is small, the steel tube can withstand higher axial compression ratio, and the ability of further deformation and energy dissipation. T-shaped concrete-filled steel tubular column structure has good seismic performance.
【學(xué)位授予單位】:華北理工大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TU398.9;TU352.11
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