水平荷载作用下GRF桩基础受力特性的数值分析  

Numerical Analysis on Mechanical Behaviors of GRF Pile Foundation Under Horizontal Load

作　　者：苏航州 段伟[2] 段晓伟[3] 秦伟华[2] 

机构地区：[1]长安大学公路学院,陕西西安710064 [2]中北大学土木工程系,山西太原030051 [3]长安大学建筑工程学院,陕西西安710064

出　　处：《水利与建筑工程学报》2015年第3期200-204,共5页Journal of Water Resources and Architectural Engineering

摘　　要：为研究GRF桩基础在水平荷载下的承载特性,利用有限元分析软件MSC.Marc,建立GRF桩基础和普通直桩的非线性三维模型,与普通直桩进行对比,分析了GRF桩基础在水平荷载作用下的桩顶和桩身位移、桩身弯矩及桩侧土应力分布。研究发现:在相同的桩顶水平荷载作用下,GRF桩基础桩顶和桩身水平位移比普通直桩有所减小;锚杆上缘的桩身弯矩发生突变,较普通直桩有所增大,锚杆以下的桩身弯矩均小于普通直桩;GRF桩的桩前横向土抗力也比普通直桩的小,而桩前锚杆下部土体中的竖向应力有所偏高。In order to study the mechanical behaviours of the CRF pile foundation under horizontal load ,an advanced fi-nite element analysis software MSC .Marc was adopted to establish three-dimensional models of GRF pile foundation and ordinary straight pile .Comparing with the ordinary straight pile ,the top and body displacement ,bending moment and lateral soil pressure distribution of the GRF pile under horizontal load were analyzed .The study found that the top and body displacement of the GRF pile foundation were smaller than those of the ordinary straight pile under the same horizon-tal load .The bending moment of the pile body beyond the anchor increased abruptly ,which was larger than that of the ordinary pile ;whereas the bending moment below the anchor was smaller than that of the ordinary one .Lateral soil resis-tance of the GRF pile was smaller than that of the ordinary pile ,the vertical stress of the soil where the lower part of the anchor was buried was high .

关 键 词：水平荷载 GRF 桩基础 受力特性 数值分析 

分 类 号：TU432[建筑科学—岩土工程]