文章摘要
黄华,钱海增,吴国超.地裂缝场地结构抗震设防避让距离研究[J].地震工程学报,2020,42(2):536-545. HUANG Hua,QIAN Haizeng,WU Guochao.Setback Distance for Seismic Fortification and Avoidanceof Structures in Ground Fissure Sites[J].China Earthquake Engineering Journal,2020,42(2):536-545.
地裂缝场地结构抗震设防避让距离研究
Setback Distance for Seismic Fortification and Avoidanceof Structures in Ground Fissure Sites
投稿时间:2019-04-16  
DOI:10.3969/j.issn.1000-0844.2020.02.536
中文关键词: 地裂缝;框架结构;抗震;避让距离;动力响应
英文关键词: ground fissure;frame structure;earthquake resistance;setback distance;dynamic response
基金项目:国家自然科学基金资助项目(51778060);中央高校基本科研业务费专项基金资助团队项目(300102289401,300102288401)
作者单位
黄华 长安大学 建筑工程学院, 陕西 西安 710061 
钱海增 长安大学 建筑工程学院, 陕西 西安 710061 
吴国超 长安大学 建筑工程学院, 陕西 西安 710061 
摘要点击次数: 29
全文下载次数: 36
中文摘要:
      以西安地铁二号线沿线地质勘查资料为基础,借助ABAQUS有限元软件建立地裂缝场地与结构共同作用模型,将结构分别置于距地裂缝不同距离的位置,并施加El-Centro地震波,通过比较不同位置结构的层间位移角、框架柱剪力的变化情况,研究近地裂缝结构在地震作用下的工作特性,找出不同避让距离下的结构动力响应变化规律,并与地表峰值加速度的变化规律进行对比分析,为地裂缝场地结构的避让距离选取提供参考。结果表明:上盘结构层间位移角放大幅度为30%~41%,而下盘结构层间位移角放大幅度为18%~22%,上盘结构的破坏程度远大于下盘结构。随避让距离的增大,地表加速度峰值逐渐减小,结构破坏情况相应减弱,但地表峰值加速度表现出现较为平缓的线性下降,而其上部结构的峰值位移曲线则出现大幅度的下降,甚至在近地裂缝处产生突变,其最大层间位移角放大幅度由41%降为21%,地表加速度峰值的变化并不能完全反映出近地裂缝结构的动力响应规律。位于地裂缝场地的结构动力时程响应规律明显区别于普通场地上的结构,对位于地裂缝场地的结构进行抗震设计时应对水平地震影响系数最大值αmax进行调整。
英文摘要:
      Based on geological exploration data obtained along the Xi'an Metro Line 2, in this study, we used ABAQUS finite element software to establish an interaction model for a ground fissure site and structure. In the experiment, the structure was placed at different distances from the ground fissure followed by the application of a seismic wave equivalent to that of the El Centro earthquake. We then compared the changes in the story drift ratio and shear force of the frame columns at the different locations to study the working characteristics of the near-ground fissure structure under earthquake. We determined the dynamic response law of the structure for different setback distances, which were then compared with the variation law of peak acceleration of the ground surface. The results showed that the magnification of the story drift ratio was 30%-41% for a hanging wall structure and 18%-22% for a footwall structure. With increases in the setback distance, the peak acceleration gradually decreased, as did the degree of structural damage. The peak ground acceleration showed a gentle linear decline, and the magnification of the maximum story drift ratio decreased from 41% to 21%. Variation in the peak ground acceleration does not fully reflect the dynamic response law of a near-ground fissure structure. The dynamic time history response law of a structure located at a ground fissure site obviously differs from that at a regular site. The maximum horizontal seismic influence coefficient must be adjusted when a structure located at a ground fissure site is designed for seismic resistance.
查看全文   查看/发表评论  下载PDF阅读器
关闭

您是第3395398位访问者
版权所有欢迎《地震工程学报》编辑部
主管单位:中国地震局 主办单位:中国地震局兰州地震研究所
清华大学
中国地震学会
中国土木工程学会
地  址: 甘肃省兰州市东岗西路450号 邮编:730000 电话:0931-8275892 E-mail: dzgcxb@gsdzj.gov.cn
本系统由北京勤云科技发展有限公司设计