某门诊住院楼消能减震加固设计与抗震性能分析

对于某工业厂房改造为医院门诊住院楼项目,文章采用基于消能减震技术的抗震加固方案进行分析设计,结合项目情况确定加固方案,在合理位置布置适当数量的黏滞阻尼器,采用ETABS有限元软件建立减震前后分析模型;分别在多遇地震下进行反应谱分析、弹性时程分析,对比减震前后模型层间剪力和层间位移角变化,并采用能量法计算附加阻尼比;提出在罕遇地震下预期抗震性能目标,通过动力弹塑性时程分析,对比层间位移角变化,并对建筑物进行性能评价。研究结果表明:与原结构相比,减震结构地震响应明显降低,塑性变形和损伤破坏满足抗震目标要求,黏滞阻尼器起到良好的耗能作用,减震设计效果显著。

In view of a project to transform an industrial plant into an outpatient and inpatient building of a hospital, the seismic reinforcement scheme based on energy dissipation and vibration reduction technology is designed. The reinforcement scheme is determined based on the project characteristic, the appropriate number of viscous dampers is arranged at a reasonable location, and the ETABS finite element software is used to establish the analysis model before and after the seismic reduction. The response spectrum analysis and the elastic time history analysis are carried out under frequent earthquakes, the inter-story shear force and displacement angle changes before and after the seismic reduction are compared, and the additional damping ratio is calculated by the energy method. The expected seismic performance target under rare earthquakes is proposed, and the dynamic elasto-plastic time history analysis is used to compare the inter-story displacement angle changes. The performance evaluation on the building is conducted. The research results show that compared with the original structure, the seismic response of the damping structure is significantly reduced, the plastic deformation and damage meet the requirements of the seismic target, the viscous damper plays a good role in energy dissipation, and the damping effect is remarkable.