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Research on Ascertaining the Position of Fixity of Tall Buildings with Basements and Some Other Problems

Author: ZhangChaoYun
Tutor: LiYingMin
School: Chongqing University
Course: Structural Engineering
Keywords: High-rise building Basement Embedded solid end Relative stiffness Non-peripheral constraint
CLC: TU973.2
Type: Master's thesis
Year: 2008
Downloads: 259
Quote: 2
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Abstract


During the structural analysis of high-rise buildings must first determine its structure embedded important fixed end the structure embedded solid side location correctly select. In this paper, a theoretical study and numerical example, the basement roof-mounted side as the upper structure conditions and related issues, the main tasks include the following aspects: (1) to establish a simplified layer model preliminary analysis of the dynamic performance of the high-level structure and example verification of finite element analysis to study the different structural forms of high-rise building basement floors and adjacent the upper floors lateral stiffness ratio calculation method and a reasonable range; ② For high-rise building with a larger area of ??the basement and smaller upper tower the case of flexible floor assumption, by example simulation and stress analysis to explore the the basement relative stiffness selection as well the basement roof-mounted side as the upper structure conditions; ③ The mountain type of building the presence of non-peripheral constraints , discussed issues related to basement roof can be used as the upper structure embedded solid side. Through this study, the following conclusions: (1) For the calculation of lateral stiffness of the basement floors, displacement between the current specification of the shear stiffness and story shear layer than the two calculation methods. The two methods are quite different in the calculation of the basement floor with the adjacent superstructure floors lateral stiffness ratio when recommended shear stiffness ratio. ② structure of reinforced concrete frame and shear wall structure, basement floors and adjacent to the upper floors of the lateral stiffness ratio is greater than 2, the structure of the performance of error is small, the basement structure able to withstand the upper part of the structure and its own earthquake basement roof can be as the embedded solid end of the upper part of the structure. ③ with a larger area of ??the basement and the upper part of the tower is smaller, in the calculation of the relative stiffness of the basement, only to consider the contribution of the main structure and around lateral force resisting member. The range can be taken of the body structure around the two horizontal directions were taken about 2 Cross basement structure. (4) by increasing the main structure of the outer basement across several member stiffness, lateral force resisting member forces to reduce the main structure within the basement, basement structure to withstand the superstructure yield the super well basement earthquake can produce significant results. ⑤ with non-peripheral constraint of the high-level structure of the basement, it is recommended that the the basement roof can be as the embedded solid parts of the upper structure, but should meet the computational analysis of conditions and structural measures.

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CLC: > Industrial Technology > Building Science > High-rise buildings > Tall Building Structures > Structural Analysis and Calculation
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