| 云冈石窟第19窟西耳窟地震动力响应 |
| |
| 引用本文： | 孙博,彭宁波,王逢睿.云冈石窟第19窟西耳窟地震动力响应[J].西南交通大学学报,2012,47(4):573-579. |
| |
| 作者姓名： | 孙博 彭宁波 王逢睿 |
| |
| 作者单位： | 1. 中铁西北科学研究院有限公司,甘肃兰州,730000
2. 兰州大学西部灾害与环境力学教育部重点实验室,甘肃兰州,730000 |
| |
| 基金项目： | “十一五”国家科技支撑计划资助项目(2009BAK53B04) |
| |
| 摘 要： | 为探索石窟地震动力响应,建立了云冈石窟第19窟西侧耳窟的三维实体模型,并用有限差分软件FLAC3D对耳窟进行了地震动力模拟计算,分析了硐室岩体位移、加速度放大系数、应力分布和加速度傅里叶谱.数值模拟结果表明:地震作用下,该窟外立面岩体有外倾和塌落的趋势;石窟岩体的破坏模式以剪切破坏为主;地震波在耳窟所在高程范围的岩体内经多次反射、叠加,能量损耗较大,耗散的能量被该区域的岩体吸收,因此,进行抗震加固设计时,应适当提高此区域的地震加速度.
|
| 关 键 词： | 石窟 地震动力响应 稳定性 数值模拟 |
Seismic Dynamic Responses of No.19 Grotto’s West Side Cave of Yungang Grottoes |
| |
| SUN Bo
,
PENG Ningbo
,
WANG Fengrui.Seismic Dynamic Responses of No.19 Grotto’s West Side Cave of Yungang Grottoes[J].Journal of Southwest Jiaotong University,2012,47(4):573-579. |
| |
| Authors: | SUN Bo PENG Ningbo WANG Fengrui |
| |
| Institution: | 1(1.Northwest Research Institute Co.Ltd.of China Railway Engineering Corporation,Lanzhou 730000,China;2.MOE Key Laboratory of Mechanics on Western Disaster and Environment,Lanzhou University,Lanzhou 730000,China) |
| |
| Abstract: | A three-dimensional entity model for the 19th grotto’s west side cave of Yungang Grottoes was built in order to explore the seismic dynamic responses of grottoes.A finite difference software,FLAC3D,was used to numerically simulate the displacement,acceleration amplification factor,stress distribution and acceleration Fourier spectrum of its chamber and surrounding rock.The simulation results show that its external cliff has a trend of outward collapse,and the main failure mode of rock mass is shear failure.Seismic waves are reflected and superimposed on each other in the region near the chamber,and large energy is absorbed by rock mass,so earthquake acceleration in the region should be augmented in antiseismic strengthening design. |
| |
| Keywords: | grotto seismic dynamic response stability numerical simulation |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
