各向异性岩体中岩锚吊车梁分析

 根据层状各向异性岩体中岩锚吊车梁的受力特点，提出了岩锚吊车梁设计的基本方法即有限元计算法。采用三维弹塑性有限元对施工期、运行期吊车梁及围岩的应力、变形、稳定性进行了分析计算，并根据锚杆的“承拱悬吊”机理和三维有限元计算的特点，采用了隐式杆单元对吊车梁的悬吊锚杆进行分析计算。通过对工程实例的分析计算，论证了有限元法能较好地反映层状各向异性岩体中岩锚吊车梁的受力特点；为各向异性岩体中的岩锚吊车梁的计算提供了一种有效的分析方法。

Analysis on anchor concrete beam buried in stratified anisotropic surrounding rock

According to the features of load-bearing of concrete beam anchored in stratified anisotropic surrounding rock, a basic computational method of FEM for analysing anchoret concrete beam is proposed. The stresses,deformations, stabilities of anchored concrete beam and its surrounding rock during construction and operation are calculated by 3D elastoplastic FEM. And ccording to the mechanism of “bearing, arch and suspension” of anchor-bar and the features of 3D nonlinear FEM, an implicit rod element to imulate the suspending anchor-bar of concrete beam is employed. The calculation results from an illustration demonstrate that this FEM can etter reflect some basic regularities of loadX-bearing of concrete beam anchored in stratified anisotropic surrounding rock. Thus , anffectively analytic way is provided for the calculation of an anchored concrete beam buried in this kind of rock mass.