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Research on Seismic Performance and Deformation Limit States of Shear Walls with Concealed Bracings

Author: SunSiWei
Tutor: JiJing
School: South China University of Technology
Course: Structural Engineering
Keywords: Shear wall with concealed bracings Performance-based seismic design Performance Indicator MESAP platform Macro cell More vertical spring unit
CLC: TU398.2
Type: Master's thesis
Year: 2011
Downloads: 37
Quote: 0
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Abstract


Shear wall structure is the most commonly used high-rise building core lateral force resisting member of one of its seismic performance improvement the engineering has been of concern. Object of this paper is a novel combination of shear - shear wall with concealed bracings, namely on the basis of the common wall plus bars or steel or reinforced - steel concealed bracing. Tests showed that shear wall with concealed bracings can effectively improve the shear wall ductility, energy dissipation capability and capacity, to better improve the seismic performance of shear walls. Shear wall with concealed bracings structure is relatively simple, practical, strong, and has good prospects for development. On the other hand, performance-based seismic design method has become today's mainstream method for seismic design, the design method proposed not only to meet capacity requirements, but also according to the owners needs to set the entire life cycle of the structure corresponding deformation limits can effectively control structure due to the damage caused by earthquakes, reaching optimal cost. In this paper, MESAP platform using multiple vertical spring element model (MVLEM) for ordinary shear walls and shear wall with concealed bracings simulation, verification, two shear wall model and parameters of reliability and feasibility of, and in this change impacts on the basis of the performance parameters of shear wall design shear wall with concealed bracings 240 specimens, and analyzed through the results, the small, medium, shear wall with concealed bracings under earthquake deformation of components limits. The main contents are as follows: 1. Summarizes the current domestic and foreign scholars have done to improve the seismic performance of shear walls and a variety of experimental studies of macro cell wall development status, for the national performance-based seismic design method has been developed detail. (2) based on macro-cell plastic analysis MESAP platform developed several vertical spring unit. Platform for multi-use MESAP classic vertical spring unit test specimen to simulate, validate the feasibility and reliability of MESAP platform, multi-vertical spring unit by changing the main parameters were analyzed and compared with the results presented corresponding parameters The reasonable value. 3 selected 12 different structural forms of shear test specimens, including ordinary shear walls and two types of shear wall with concealed bracings, using MESAP its simulation platform to verify the simulation with concealed bracings shear MESAP Wall feasibility and reliability analysis and comparison of different structural forms and different axial compression ratio and different shear span ratio of the seismic performance of shear wall specimens, summed up the concealed bracing on the seismic behavior of shear walls and improvement results. 4 After verifying the MESAP model and parameters on the basis of accuracy and reliability, by varying the shear span ratio, axial compression ratio, the longitudinal edges of steel reinforcement ratio and steel ratio four parameters, the design of rectangular cross-section 240 shear wall with concealed bracings model, through the analysis of these four parameters on shear bearing capacity and deformation performance, presented at the subdivision shear span ratio and the case of axial compression ratio corresponding shear wall with concealed bracings member deformation performance limits for shear wall with concealed bracings performance-based seismic design to provide relevant information.

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CLC: > Industrial Technology > Building Science > Building structure > Composite structure > Frame , shear wall structure
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