摘要
石碑文物形制特殊、质量大、宽高比小,普通的抗震措施难以对建筑楼层,特别是较高楼层内浮放石碑文物进行较好的保护。为有效保护楼层浮放石碑,基于浮放石碑文物在地震作用下保持相对静止状态的防震保护目标,提出双重隔震保护方法,即对博物馆建筑结构采取隔震方案的同时对馆藏浮放石碑文物设置隔震措施;给出双重隔震保护技术的设计方法及流程。通过理论推导与有限元模拟开展双重隔震保护技术分析,对比仅结构基础隔震、仅石碑碑底隔震及双重隔震的动力响应,结果表明:高烈度地区双重隔震保护技术需充分考虑竖向和长周期地震作用的影响;随着碑底隔震系统周期的增加,两重隔震系统周期差距逐渐增大,双重隔震的防震保护效果更加明显;所提出的浮放石碑隔震保护加速度需求谱表述了双重隔震系统对动力响应的衰减作用,可用于不同高宽比浮放石碑文物的隔震保护设计。
Due to unique shape,heavy weight,and low width-to-height ratio,freestanding stele artifacts are inherently difficult to protect with conventional seismic measures when placed on building floors,particularly on higher floors.A dual seismic isolation protection method was proposed to maintain relative stability of freestanding stele artifacts on the building floors during seismic events.The proposed dual isolation protection method involved implementing isolation measures for both the museum building structure and the freestanding stele artifacts within the collection.The working mechanism of the dual seismic isolation protection method was revealed and a systematic design process for implementing dual seismic isolation protection was developed.A comparative analysis on dynamic responses of three seismic isolation configurations,structural base isolation,stele pedestal isolation,and dual isolation systems,was conducted by using theoretical derivation and finite element simulations under seismic excitation conditions.The results demonstrate that the effects of vertical and long-period ground motions should be fully considered for dual seismic isolation protection technology in high-intensity seismic zones.As the period and damping of the stele pedestal isolation system increases,the difference between the period of base isolation and stele pedestal isolation increases and the dynamic response of stele artifacts decreases,which emphasizes the benefits of dual seismic isolation.The proposed acceleration demand spectrum indicates the attenuation effect of the dual isolation system on dynamic response,providing the guideline for the seismic isolation protection of freestanding stele artifacts with different aspect ratios.
作者
唐超
卢文胜
温文露
任祥香
TANG Chao;LU Wensheng;WEN Wenlu;REN Xiangxiang(College of Civil Engineering,Tongji University,Shanghai 200092,China;State Key Laboratory of Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China;QuakeSafe Technologies Co.,Ltd,Kunming 650000,China)
出处
《建筑结构学报》
北大核心
2025年第7期205-217,共13页
Journal of Building Structures
基金
国家自然科学基金项目(52308527)
重庆市自然科学基金项目(CSTB2022NSCQ-MSX0476)
教育部重点实验室重点课题(MEKL202307)。
关键词
浮放石碑文物
防震保护
双重隔震
竖向地震作用
长周期地震动
动力响应
freestanding stele artifacts
seismic protection
dual isolation
vertical seismic action
long-period ground motions
dynamic response
作者简介
唐超,出生于1998年,男,博士研究生,主要从事减隔震技术研究。email:2410049@tongji.edu.cn;通信作者:任祥香,出生于1988年,女,工学博士,工程师,主要从事结构隔震及结构试验技术研究。email:xiangxiangren@tongji.edu.cn。
