某砖塔抗震性能鉴定与隔震加固分析  

SEISMIC PERFORMANCE APPRAISAL AND SEISMIC REINFORCEMENT ANALYSIS OF A BRICK TOWER

作　　者：宋小康 徐超 齐菲 李鹏飞 SONG Xiaokang;XU Chao;QI Fei;LI Pengfei(School of Civil Engineering,XinYang University,Henan Xinyang 464099,China)

机构地区：[1]信阳学院土木工程学院,河南信阳464000

出　　处：《低温建筑技术》2020年第11期47-49,共3页Low Temperature Architecture Technology

基　　金：河南省大学生创新重点项目(S201913503008);信阳学院校级科研项目(2019-XJLYB-008)。

摘　　要：为提升受震时砖石古塔安全性能,结合隔震技术开展砖塔防震加固分析。首先采用多指标评价法对某7层砖塔进行定性、定量视角下抗震性能鉴定,评价结果显示现存砖塔结构不满足当地抗震设防要求;其次,提出LRB+NRB组合隔震加固设计方案。最后,进行设防烈度地震下抗震性能对比,结果显示隔震砖塔周期较原砖塔延长3.1倍,隔震砖塔顶层加速度峰值较原砖塔降低48%、隔震砖塔水平变形集中在隔震层内。研究表明隔震技术有效增强砖塔抗震性能,给砖塔抗震加固提供优化策略。In order to improve the safety performance of ancient masonry pagoda under the earthquake,the seismic fortification analysis of brick tower combined with seismic isolation technology is studied.Firstly,the seismic performance of a 7-storey brick tower is evaluated by using the multi index evaluation method.The evaluation results show that the existing brick tower structure does not meet the local seismic fortification requirements Secondly,the LRB+NRB composite seismic isolation reinforcement design scheme is proposed.The results show that the period of the isolated brick tower is 3.1 times longer than that of the original brick tower.Moreover,the peak acceleration of the top layer of the isolated brick tower is 48%lower than that of the original brick tower,and the horizontal deformation of the isolated brick tower is concentrated in the isolation layer.Finally,the isolation technology can effectively enhance the seismic performance of brick tower,and provide optimization strategy for seismic reinforcement of brick tower.

关 键 词：砖石古塔 抗震鉴定 组合隔震 数值分析 

分 类 号：TU352.1[建筑科学—结构工程]