某既有学校建筑基于保持正常使用功能的减震加固分析

Analysis of seismic reinforcement for an existing school building based on maintaining normal functional requirements

为满足学校等八大类建筑在本地区抗震设防烈度地震作用下,保持正常使用功能,提供合理可行的技术路径,2023年7月发布的《基于保持建筑正常使用功能的抗震技术导则》提出了统一的设计方法和技术措施要求。以使用近30年的漳州龙海区某既有学校建筑为例,采用加设黏滞阻尼器减震加固的设计方法,参照《导则》要求,运用结构分析软件进行多方法附加阻尼比计算对比、设防地震及罕遇地震工况下结构变形和结构构件损伤对比分析、楼面水平加速度计算分析等,验证了消能减震加固技术能有效提高既有建筑保持震时正常使用功能的性能,降低既有建筑抗震构造措施要求,对于类似既有混凝土框架结构学校建筑的加固工程具有借鉴意义。

In order to provide a reasonable and feasible technical path for maintaining the normal use function of eight types of buildings,including schools,under the seismic fortification intensity of the local area,the"Seismic Technical Guidelines Based on Maintaining the Normal Use Function of Buildings"released in July 2023 proposes a unified design method and technical measures requirements.,This article takes an existing school building in Longhai,Zhangzhou that has been in use for nearly thirty years as an example,and adopts the design method of adding viscous dampers for seismic reinforcement.Referring to the requirements of the"Guidelines",structural analysis software is used to compare and calculate multiple additional damping ratios,compare and analyze structural deformation and component damage under seismic and rare earthquake conditions,and calculate and analyze horizontal acceleration of the floor,The verification of energy dissipation and seismic reduction reinforcement technology can effectively improve the performance of existing buildings in maintaining normal seismic performance,reduce the requirements for seismic structural measures of existing buildings,and have reference significance for reinforcement projects of similar existing concrete frame structure school buildings.