地震力作用下基坑抗震极限分析  

Seismic Limit Analysis of Foundation Pit under Seismic Force

作　　者：卓维松[1] ZHUO Weisong(Fujian Chuanzheng Communications College,School of Civil Engineering,Fuzhou Fujian 350007,China)

机构地区：[1]福建船政交通职业学院土木工程学院,福建福州350007

出　　处：《萍乡学院学报》2024年第3期35-40,共6页Journal of Pingxiang University

摘　　要：为揭示塑性极限状态下考虑地震力影响的基坑抗震破坏乘数变化规律,文章以某基坑工程为例,运用极限分析原理,对其抗震性能进行分析。结果表明:极限分析解较传统有限元解小且二者相差不大;基坑对各方向的地震加速度的承受能力不同,其中对竖直向的地震加速度承受能力最强;在地震力作用下,钻孔灌注桩和碳素钢锚杆会发生弯折破坏;随着锚杆数量和钻孔灌注桩深度增大,基坑抗震破坏乘数也逐渐增大。In order to reveal the variation law of seismic damage multiplier of foundation pit considering the influence of seismic force under plastic limit state,taking a foundation pit project as an example,the seismic performance is analyzed by using the principle of limit analysis.The results show that the limit analysis solution is more conservative than the traditional finite element solution and the difference between the two is not large.The bearing capacity of the foundation pit to the seismic acceleration in all directions is different,among which the bearing capacity to the vertical downward seismic acceleration is the strongest.Under the action of seismic force,the bending failure of bored piles and carbon steel anchors will occur.With the increase of the number of anchor bolts and the depth of bored piles,the seismic damage multiplier of foundation pits also increases gradually.

关 键 词：极限分析 地震力作用 锚杆支护 破坏乘数 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术]