鋼筋混凝土斜支撐框架結(jié)構(gòu)優(yōu)化設(shè)計(jì)
[Abstract]:Reinforced concrete oblique braced frame structure system is a certain number of concrete slant braces arranged in the frame structure. Because of the increase of oblique bracing, the lateral stiffness of the frame is improved, and the position of the inclined bracing is flexible, which is superior to the frame-shear wall structure system in using function. In addition, the concrete oblique braces have the characteristics of the integrity of pouring and can be arranged in one direction, which is superior to the steel structure in some aspects. The model of frame structure, frame-shear wall structure and reinforced concrete slanting braced frame structure are established by using PKPM series structural design software, and the frame structure, frame-shear wall structure and reinforced concrete oblique braced frame structure model are established for the same plane form. A 4 脳 5 span structure of 11 stories above ground and 1 underground floor is taken. The mass and stiffness distribution of the structure is uniform, regular, the height of the first to third layers is 4.8 m, the other layers are 3.3 m, the fortification intensity is 8 degrees, the basic seismic acceleration is 0.2 g, and the second type site is designed. According to the bending moment, shear force, elastic interstory displacement angle and vertex displacement of these structures under earthquake action, the rationality of various structural forms is judged, and the amount of steel in the structures is compared. Through the comprehensive comparison of the internal force and the steel content of the structure, the optimum design is carried out. For high-rise structure, the comparison of internal forces shows that the arrangement of shear wall in the two directions of frame and shear wall easily leads to the difference of stiffness in two directions, and the stiffness of the structure increases obviously when the cross-section of inclined bracing is increased. The effect of concrete bidirectional oblique bracing is better than that of unidirectional oblique bracing, which is suitable for structures with high seismic intensity and high story height, and the comparison of steel content shows that reinforced concrete oblique braced frame structures are more economical. In addition, a five-story primary school building with an earthquake fortification intensity of 8 degrees and a basic seismic acceleration of 0.2 g is established. The calculation results of the frame-shear wall structure and the reinforced concrete bidirectional oblique braced frame structure show that, The stiffness of the former is much greater than that of the latter, and the steel content of the latter is slightly smaller than the former.
【學(xué)位授予單位】:河北聯(lián)合大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2013
【分類號(hào)】:TU375.4
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