强震作用下坡顶建筑荷载对边坡稳定性影响研究  

Influence of top building load on the slope stability under strong earthquakes

作　　者：李旭东 王平[1,2,3] 王丽丽[1,2,3] 王会娟[1,2] 常文斌 钱紫玲[1] LI Xudong;WANG Ping;WANG Lili;WANG Huijuan;CHANG Wenbin;QIAN Ziling(Lanzhou Institute of Seismology, CEA, Lanzhou 730000, Gansu, China;Key Laboratory of Loess Earthquake Engineering of CEA & Gansu Province, Lanzhou 730000, Gansu, China;Institute of Geotechnical Engineering, Xi'an University of Technology, Xi'an 740048, Shaanxi, China)

机构地区：[1]中国地震局兰州地震研究所,甘肃兰州730000 [2]中国地震局(甘肃省)黄土地震工程重点实验室,甘肃兰州730000 [3]西安理工大学岩土工程研究所,陕西西安710048

出　　处：《地震工程学报》2021年第5期1220-1227,共8页China Earthquake Engineering Journal

基　　金：中央级科研院所基本科研业务费项目(2019IESLZ05,2020IESLZ07);国家自然科学基金项目(U1939209);甘肃省科技计划项目(18YF1FA101)。

摘　　要：为研究强震作用下坡顶建筑荷载对边坡稳定性的影响,结合黄土地区典型建筑的临坡分布特点,在利用模型试验探讨黄土边坡破坏特点的基础上,结合有限元模拟软件建立不同临坡距离建筑荷载下的三维边坡模型。通过分析边坡总位移云图、水平向位移云图及最大剪应变云图,判断坡体潜在危险区域的变化规律。研究结果表明,随着坡顶建筑临坡距离的增加,顶部荷载变形区域与边坡潜在滑动面的重合区域递减,在距坡顶20 m外不再受到来自边坡潜在风险滑动面的影响。To study the influence of top building load on the slope stability under strong earthquakes,combined with the distribution characteristics of typical buildings in loess areas,the damage characteristics of loess slopes were discussed through a series of model tests,then a three-dimensional slope model under building load with different distances to the slope was established with the finite element simulation software.By analyzing the total displacement nephogram,horizontal displacement nephogram,and maximum shear strain nephogram of the slope,the variation law of potential dangerous area of the slope was judged.The study results showed that with the increase in the distance of top buildings to the slope,the coincidence area between the top load deformation area and the potential sliding surface of the slope decreases,and it is no longer affected by the potential risk sliding surface of the slope 20 m away from the top of the slope.

关 键 词：强震 黄土边坡 建筑荷载 振动台模型试验 

分 类 号：TU47[建筑科学—结构工程]