CAJ | 학술논문

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。
위연구 GRF 장기출재수평하재하적승재특성，이용유한원분석연건 MSC ．Marc ，건립 GRF 장기출화보통직장적비선성삼유모형，여보통직장진행대비，분석료 GRF 장기출재수평하재작용하적장정화장신위이、장신만구급장측토응력분포。연구발현：재상동적장정수평하재작용하，GRF 장기출장정화장신수평위이비보통직장유소감소；묘간상연적장신만구발생돌변，교보통직장유소증대，묘간이하적장신만구균소우보통직장；GRF 장적장전횡향토항력야비보통직장적소，이장전묘간하부토체중적수향응력유소편고。
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 .