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《地震研究》[ISSN:1000-0666/CN:53-1062/P]

卷:

期数:

2025年01期

页码:

159-169

栏目:

出版日期:

2024-12-20

文章信息/Info

Title:

Experimental Study on Seismic Response of The Zhongjiang South Pagoda in Mountainous Terrain

作者:

姜治军¹; 2; 钟荣强¹; 张 磊¹; 3; 李胜才¹; 张 锋¹; 魏春明²

(1.扬州大学 建筑科学与工程学院,江苏 扬州 225100; 2.江苏省华建建设股份有限公司,江苏 扬州 225000; 3.北京工业大学 城市与工程安全减灾教育部重点实验室,北京 100124)

Author(s):

JIANG Zhijun¹; 2; ZHONG Rongqiang¹; ZHANG Lei¹; 3; LI Shengcai¹; ZHANG Feng¹; WEI Chunming²

(1.College of Architectural Science and Engineering,Yangzhou University,Yangzhou 225100,Jiangsu,China；2.Jiangsu Huajian Construction Co. ,Ltd. ,Yangzhou 225000,Jiangsu,China；3.The Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education,Beijing University of Technology,Beijing 100124,China)

关键词:

山地地形;  中江南塔;  地震响应;  振动台试验

Keywords:

mountainous topography;  the Zhongjiang South Pagoda;  seismic response;  shaking table test

分类号:

P315.923

DOI:

10.20015/j.cnki.ISSN1000-0666.2025.0017

摘要:

为研究山地地形对砖石古塔地震响应的影响,以位于四川中江县铜鱼山顶的中江南塔作为原型,选取了汶川地震发生时自贡台阵的加速度记录为基底输入,通过小型振动台试验研究了山底、山顶古塔自振频率随地震动幅值的变化趋势,分析了地形效应对古塔地震响应的影响及古塔破坏特征。结果表明:在低幅值地震动作用下古塔自振频率不变,当自由地表地震动峰值分别达到100 Gal和150 Gal时,山顶和山底古塔发生破坏; 在古塔自振特性、输入地震动的频谱特征以及结构构造特点影响下,古塔发生了“上轻下重”的破坏特征; 与山底古塔相较,山顶古塔地震反应明显更大,相同工况下山顶古塔各楼层峰值加速度、最大相对位移、最大层间位移角分别为山底古塔的2～3倍、1.5～4.5倍、1.5～4.5倍,其中最大相对位移和最大层间位移角的放大倍数与地震动幅值相关,因此需重视山顶古塔的地震安全性。

Abstract:

In order to study the influence of mountainous topography on the seismic response of the ancient masonry pagoda,we took the Zhongjiang South Pagoda located on top of the Tongyu Mountain in Zhongjiang County,Sichuan Province as a prototype,and selected the acceleration recordings by the stations of the Zigong Array during the Wenchuan M_S8.0 earthquake as the input,and studied through a small shaking table test the variation trend of the natural vibration frequency of the structure at the bottom and on top of the mountain with the amplitude of input ground motion.We further analyzed the influence of the topographic effect on the seismic response of the ancient pagoda and the failure mode of the pagoda.The results show that the natural frequency of the ancient pagoda remains unchanged under the action of low-amplitude ground motion,and when the peak of free surface ground motion reaches 100 Gal and 150 Gal respectively,the ancient pagodas on top and at the bottom of the mountain is damaged.Under the influence of the natural vibration characteristics of the ancient pagoda,the spectral characteristics of the input ground motion and the building constitution,the ancient pagoda has undergone a failure mode of “slight on top and severe at the bottom” .The peak acceleration,maximum relative displacement and maximum inter-story drift of each floor of the ancient pagoda at the top of the mountain are 2-3 times,1.5-4.5 times and 1.5-4.5 times of those at the bottom of the mountain under the same working conditions,and the amplification factor of maximum relative displacement and maximum inter-story drift is related to the amplitude of input seismic motion.Thus,it is necessary to pay attention to the seismic safety of the ancient pagoda on the mountain.

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备注/Memo

备注/Memo:

收稿日期:2023-12-20.
基金项目:国家自然科学基金项目(51478409); 江苏省产学研合作项目(BY20221086); 北京工业大学城市与工程安全减灾教育部重点实验室开放课题(2023B05); 教育部供需对接就业育人项目(2023122959765).
第一作者简介:姜治军(1984-),博士,主要从事古建筑保护与地震工程领域研究.E-mail:jiangzj@yzu.edu.cn.
通信作者简介:张 磊(1986-),博士,主要从事古建保护和损伤评估等方面的研究.E-mail:zhangleihebut@126.com.

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更新日期/Last Update: 2025-01-01