摘要
分析不连续裂隙面的受力状态和运动特性,利用罚函数和拉氏乘子方法引入不连续裂隙面的特定条件,基于广义变分原理建立裂隙岩体不连续系统理论框架体系,并应用于某岩质高边坡具有特殊不连续裂隙面倒楔形体的数值分析研究中。研究结果表明,岩质高边坡对地震波的放大作用不是线性增大的,在不同的高程处加速的峰值放大呈交错变化;岩质高边坡存在凌空面的放大作用,同一高程处坡面的加速度值都大于山体内部的响应值;不连续裂隙断层对边坡的地震响应具有重要影响,尤其是对裂隙周围岩体的影响更显著。研究结果为该工程的高边坡动力特性的认识和后期治理提供了重要的参考。
The seismic response of high slope with special fractured rock was analyzed in this pape .Forced state and movement characteristics of discontinuity fracture surface were analyzed in detail .The constraint condition of discontinuity fracture surface was introduced by the penalty functions and Lagrange multipliers method .Based on generalized variational principle ,the disconti‐nuity theory framework of fractured rock mass was established ,which was applied in the numerical analysis of a special discontin‐uous fracture surface of high rock slope with inverted wedge .The results showed that the method was reliable .The seismic re‐sponse analysis of high rock slope did not linearly increase .The amplifier of peak acceleration at different elevation was stag‐gered .The input seismic waves were affected by surface amplification of the slopes .The peak acceleration in the slope was grea‐ter than the mountain at the same elevation .The discontinuous fracture surface of rock mass has an important implication on seis‐mic response of slopes ,particularly more significant influence on the surrounding rock of discontinuous fracture surface .The study provides an important reference for the awareness of the dynamic characteristics of high slope engineering and later manage‐ment .
出处
《中国科技论文》
CAS
北大核心
2016年第7期776-780,共5页
China Sciencepaper
基金
高等学校博士学科点专项科研基金资助项目(20126118110014)
关键词
高边坡
裂隙
地震
动力响应
数值分析
high slope
fractured rock
seismic
dynamic response
numerical analysis
