圣寿寺唐代砖塔地震响应和损伤分析
Seismic response and damage analysis of brick Shengshou Pagoda of Tang dynasty
侯涛 1韦俊 1吴晓琴 2卢俊龙 2吴义3
作者信息
- 1. 苏州科技大学土木工程学院,江苏苏州 215011
- 2. 西安理工大学土木建筑学院,陕西西安 710048
- 3. 苏州大学后勤管理处,江苏苏州 215006
- 折叠
摘要
为研究圣寿寺塔在地震作用下的响应及损伤机制,对其进行抗震保护,通过有限元软件ABAQUS以分层建模方法建立塔体结构的数值模型,计算了其动力特性.并输入El-Centro波、Taft波和兰州人工波,通过计算塔体地震反应,得到结构的加速度放大系数、层间位移以及层间位移角,分析了结构的地震损伤分布规律.结果表明,塔顶的加速度放大效应最为显著,水平层间位移角值最大,结构上部较早发生塑性变形而开裂破坏.塔底地震损伤明显,首层是结构的薄弱部位,灰缝早于块体发生开裂并逐层向上延伸.塔檐先于塔体发生受拉破坏,破坏区域自塔檐中部向四角蔓延.研究结果为圣寿寺塔的抗震能力评估提供依据,为其抗震保护奠定基础,研究方法可为其他砖石古塔提供参考.
Abstract
To study the response and damage mechanism of Shengshou Pagoda under the earthquake and carry out its seismic protection,the numerical model of the pagoda was established by the finite element software ABAQUS with a layered modelling,and its dynamic characteristics were calculated.El-Centro wave,Taft wave and Lanzhou artificial wave were input to obtain the structure's acceleration amplification coefficient,inter-story displacement and inter-story displacement angle by calculating the pagoda's seismic response,and the distribution law of seismic damage of the construction was analyzed.The results show that the acceleration amplification effect at the top of the pagoda is the most significant,the horizontal inter-story displacement angle is the largest,and the early plastic deformation of the structure's upper part leads to its cracking and failure.The earthquake damage at the bottom of the pagoda is apparent,the first floor is the weak part of the structure,and the mortar joints cracked earlier than the block and extended upward layer by layer.The pagoda eaves are damaged in tension before the tower,and the damaged area spreads from the middle of the pagoda eaves to the four corners.The study results provide a basis for the seismic capacity assessment of Shengshou Pagoda and lay foundation for its seismic protection.And this research method can also provide reference for other masonry towers.
关键词
砖石古塔/有限元/动力特性/地震反应/损伤分析Key words
masonry pagoda/finite element/dynamic characteristics/earthquake response/damage analysis引用本文复制引用
基金项目
国家自然科学基金(51778527)
陕西省重点研发计划(2022SF-376)
出版年
2024
NETL
NSTL
万方数据