某高层建筑消能减震设计及阻尼器优化

Design of energy dissipation and damperoptimization for a high-rise building

摘要:

将参数化建模的方法引入减震结构的分析与设计中,通过预设目标和迭代优化计算,以天水市某高层住宅消能减震结构为例,寻找最优的阻尼器布置方案。为评估和验证该消能减震结构的抗震性能,分别采用Perform 3D和ETABS等软件分析结构在多遇和罕遇地震作用下的结构响应,分析结果表明:小震作用下,消能减震结构的楼层位移、层间位移角、楼层弯矩及楼层剪力均减小6.5%以上,达到了设计要求;大震作用下,结构框架柱、框架梁、剪力墙和阻尼器能够满足既定的性能要求,层间位移角满足规范限值,能够达到“大震不倒”的设计目标,研究结果为实际工程预设减震目标和阻尼器优化布置提供参考。

Abstract:

Herein, the parametric modeling method was employed in the analysis and design of damping structures. An optimal damper arrangement scheme was developed by presetting objectives and iterative optimization calculations for the energy dissipation structure of a B-level high-rise residential building in Tianshui City. Perform 3D and ETABS software were used to analyze the structural response during frequent and rare earthquakes to assess the seismic performance of the energy dissipation structure. The analysis results show that during small earthquakes, the story displacement, story drift ratio, story moment, and story shear of the energy dissipation structure are reduced by ＞6.5%, which meets the design requirements. During large earthquakes, the frame columns, frame beams, shear walls, and viscous dampers of the structure can meet the requirements of performance-based design, and the story drift ratio can meet the code limit. Accordingly, the structure can achieve the design goal of “no collapse during large earthquakes.” This study provides a reference for preset damping targets and the optimal layout of dampers in practical applications.