摘要
为研究地震作用下实心式古塔结构的损伤机制,建立了兴教寺玄奘塔1/8比例模型结构的数值计算模型,基于弹性余能等效原理,引入损伤参数,计算三向地震作用下结构的动力反应,分析了结构应力与损伤因子的分布;并将结构楼层位移反应与试验结果进行对比,分析了结构损伤机制。结果表明:引入损伤因子可实现古塔结构地震损伤的数值模拟,结构应力响应结果与损伤分布区域一致,但扩展方向不完全一致,结构各楼层位移反应基本一致,顶部楼层位移反应曲线沿基线略有偏移,塔体损伤形式为砌筑缝开裂,其分布区域与损伤参数基本一致。因此,通过连续化方法计算损伤参数能够确定地震作用下古塔砌体的开裂范围。
To study the damage mechanism of solid masonry pagodas structure under earthquakes,a numerical structure model is built scaled to 1:8 from Xuanzang pagoda at Xingjiao Temple.Based on equivalence principle for elastic residual energy of the structure,the dynamic response of the structure excited by tri-directional earthquake is calculated with introducing the damage parameters.The stress distribution of the structure as well as the damage factor is analyzed.The simulated results of story drift for the structure are compared with the test results.Then,the damage mechanism of the structure is studied.The results show that the numerical simulation for seismic damage of pagodas can be carried out by introducing the damage factors.The stress response of the structure is consistent with the damage distribution area of the structure.However,there is a difference in the extending direction of cracking.The displacement response is basically the same at each floor,but displacement response curve of the top floor presents slightly offset along the baseline,and the failure modes of the tower body present as the cracking along the masonry slit.The distribution area of cracks is basically consistent with the distribution of damage parameters.Therefore,the damage parameters calculated by the continuous method can be applied to determine the cracking range of the masonry pagodas under earthquake.
作者
卢俊龙
李传立
韩鑫
张风亮
LU Jun-long;LI Chuan-li;HAN Xin;ZHANG Feng-liang(School of Civil Engineering and Architecture,Xi′an University of Technology,Xi′an 710048,China;Institute of Building Science of Shaanxi Province,Xi′an 710082,China)
出处
《振动工程学报》
EI
CSCD
北大核心
2020年第2期364-371,共8页
Journal of Vibration Engineering
基金
国家自然科学基金资助项目(51778527)
陕西省自然科学基础研究计划资助项目(2018JM5111)
陕西省科技统筹创新工程计划资助项目(2016KTZDSF04-04)。
关键词
砖石古塔
地震损伤
振动台试验
数值模拟
masonry pagoda
seismic damage
shake-table test
numerical simulation
