南郭寺南山佛法身舍利塔抗震性能研究  

Seismic Performance of the Nanshan Buddhist Body Relic Pagoda of Nanguo Temple

作　　者：李灵君 王秀丽[2] 苏永 王鑫 李晓莲 LI Lingjun;WANG Xiuli;SU Yong;WANG Xin;LI Xiaolian(School of Civil Engineering,Tianshui Normal University,Tianshui 741001,China;School of Civil Engineering,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]天水师范学院土木工程学院,甘肃天水741001 [2]兰州理工大学土木工程学院,兰州730050

出　　处：《建筑钢结构进展》2024年第6期115-128,共14页Progress in Steel Building Structures

基　　金：国家自然科学基金(52068063);甘肃省教育厅2021年度高等学校创新基金(2021B-202);天水市秦州区科技支撑计划项目(2022-SHFZG-5587);甘肃省教育厅2022年度高等学校创新基金(2022B-165);甘肃省教育厅2023年度高等学校创新基金(2023B-138)。

摘　　要：南郭寺南山佛法身舍利塔是一幢新建于高设防烈度地区山坡平地上的仿古塔建筑,设计使用年限为100年,其建筑造型和结构体系比常规建筑稍复杂。首先通过动力特性分析得到塔的自振周期和振动模态,而后基于振型分解反应谱法和时程分析法,采用有限元软件midas Gen对结构在小震、中震和大震作用下的地震响应进行了数值分析。因为在结构总说明中,只用到了设计使用年限为50年的地震作用,而未将其调整为100年,所以分析中均取2组地震动参数,即设计使用年限50年和100年。小震和中震的地震响应计算均采用弹性法,分析结果满足结构抗震性能要求。大震响应计算时,振型分解反应谱法中将特征周期提高了0.05 s,弹塑性时程分析采用塑性铰滞回模型,最大层间位移角均小于限值1/100。弹塑性时程分析还表明,内核心筒剪力墙的塑性铰发展和屈服程度均比外框架严重,但结构总体处于存在明显塑性变形至不严重破坏的状态,满足“大震不倒”的抗震性能要求。总的来说,南郭寺南山佛法身舍利塔抗震性能安全可靠,其结构体系对于类似仿古塔建筑的结构选型和设计富有借鉴意义。The Nanshan Buddhist body relic pagoda of Nanguo temple is a newly built imitation ancient pagoda building on a flat slope in high design intensity areas.The design service life is 100 years,and the building style and structural system are slightly more complex than those of conventional buildings.Firstly,the free vibration period and vibration mode of the structure were obtained through dynamic characteristic analysis.Then,the mode decomposition response spectrum method and the time-history analysis method were used to numerically analyze the seismic response of the structure under frequent,design,and rare earthquakes using the finite element software midas Gen.Due to the fact that only the seismic action with a design service life of 50 years was used in the general description of the structure,without adjusting it to 100 years,two sets of seismic motion parameters were used in the analysis,namely the design service life of 50 years and 100 years. The seismic response calculation of frequent and design earthquakes adopted theelastic method,and the analysis results met the seismic performance requirements. When the response of rareearthquakes was calculated using the mode decomposition response spectrum method,the characteristic periodincreased by 0.05 s,the elastic-plastic time-history analysis used a plastic hinge hysteresis model,and the maximuminter-story drift angle was less than the limit value of 1/100. The elastic-plastic time-history analysis also indicatesthat the plastic hinge development and yield degree of the core tube shear wall are more severe than those of the outerframe,but the overall structure is in a state where there is significant plastic deformation to less severe damage,meeting the seismic performance requirement of "no collapse in rare earthquakes". Overall,the seismic performance ofthe Nanshan Buddhist body relic pagoda of Nanguo temple is safe and reliable,and its structural system is of greatreference value for structural selection and design of similar imitation ancient pagoda build

关 键 词：南山佛塔 抗震性能 振型分解反应谱法 时程分析法 地震响应 

分 类 号：TU973.12[建筑科学—结构工程] TU973.212