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The assessed building is used for emergency shelter, the use factor I=1.5, the internal force response of the structure under the design earthquake in the 475-year return period shall not exceed 80% of the maximum base shear force (0.8Vmax), and its corresponding equivalent site surface acceleration AT is the short-period design horizontal spectral acceleration SDS of the site where the structure is located, multiplied by 0.40, that is, the so-called site horizontal acceleration coefficient Z value (Z=0.4SDS) in the seismic design code, and the maximum interstory displacement angle cannot be Greater than 1%. The seismic capacity of the building in the current condition X and Y directions are mainly controlled by the column strength criterion. The seismic capacity in the X direction is Ap-X=0.196g, and the seismic capacity in the Y direction is Ap+Y=0.142g. The Y-direction seismic capacity is insufficient and needs to be reinforced.
There are many types of reinforcement schemes, but this article only analyzes the characteristics, advantages and disadvantages of the more common reinforcement methods (column expansion, wing wall reinforcement, shear wall reinforcement) for objective judgment in subsequent value engineering group discussions. to follow.
The value engineering method is used to analyze the most suitable reinforcement method for strengthening the seismic capacity of the structure. Considering the functions, cost, lighting and ventilation, etc., the scheme 1: the expansion column reinforcement method, although the impact on ventilation and lighting is small, but it is seriously compressed. To the internal office space; Scheme 2: Shear wall composite wing wall reinforcement construction method, although the impact on the office space is small, it will cause poor lighting and ventilation. Therefore, after creative thinking, it was found that the third scheme was developed by combining the advantages of these two construction methods: the expansion of the column combined with the shear wall reinforcement scheme for reinforcement, which not only can achieve the standard CDR value, but also has the highest functional benefit.
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