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The Analysis on Stability and Vertical Seismic Response of Large-span Suspendome Structure

Author: YinXiaoGang
Tutor: ChenLan
School: South China University of Technology
Course: Structural Engineering
Keywords: Suspendome Vertical seismic response Stability Prestressed Response spectrum method Time method Wavelet Analysis
CLC: TU399
Type: Master's thesis
Year: 2011
Downloads: 60
Quote: 0
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Abstract


Dome structure tensegrity monolayer shells combined to form a large span space structure system. Its structural rigidity, high stability; compared with double-layer reticulated shell structure beautiful shape, light weight characteristics compared with monolayer shells. Therefore, suspendome can be more economical and reasonable new aesthetic across a greater span. This paper summarizes the characteristics and research status of the dome structure, the dome structure research problems to be solved. Kiewitt - Alliance square dome structure as a research object, the shape of the large span dome structure, static performance, stability, and vertical seismic role calculation methods and performance to do a more systematic and comprehensive study. The morphological and static performance analysis on the the large span suspendome structure. The the prestressing ratio set suspendome simplify the calculation formula to determine the ratio of each circle ring Prestressed; determine the shape of the dome structure particularity, the initial strain Application the tension compensation law and iteration compiled run in ANSYS APDL language program, to seek prestressed equilibrium initial strain to find the force; 100m span dome structure analysis of its prestressed equilibrium load and static state performance , and comparing them. Study span ratio changes in the parameters of the the impact dome structure static characteristics, analysis of the structure internal forces and vertical displacement, and a comprehensive understanding of the characteristics of static. Based on the basic theory of the geometric nonlinear analysis of finite element eigenvalue buckling and nonlinear buckling analysis using ANSYS software suspendome to, a the prestressing steel structure eigenvalue buckling of particularity, consider span ratio, span early the impact of of beginning defects factors of suspendome stability, arc-length method of load-displacement curve of the structure of the whole process of tracking analysis. Direct calculation based on the seismic vertical vibration using Simpson's method based on Matlab programming power analog system toolbox in the vertical earthquake response spectra and Matlab calculate the vertical seismic response spectra for comparison; specification using the simplified calculation, based on the level of seismic influence coefficient based vertical acceleration response spectrum modal response spectrum method and time history analysis of four commonly used vertical earthquake action calculation methods for analysis and comparison; natural vibration frequencies, mode shapes and influencing factors analysis; suspendome wavelet analysis for seismic waves to select Enter two seismic waves and an artificial wave time history analysis method to analyze a span of 60m, 80m, 100m and 125m, a different vector cross vertical seismic response than the dome structure.

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