Developement of Linear Boundary Element Method with Application in Tunnel Mechanics

• Main Authors: Ti-Cheng Chiu, 邱泰澄
• Other Authors: Albert Shou
• Format: Others
• Language: zh-TW
• Published: 2000
• Online Access: http://ndltd.ncl.edu.tw/handle/57441919056284818738

碩士 === 國立中興大學 === 土木工程學系 === 88 === Boundary element methods constituting the boundary type numerical model, which only requires approximations on the boundary of the domain and are based on the analytical solution being true throughout the domain, are more efficient and accurate than the domain type numerical models such as finite difference and finite element methods. In the previous study, a primitive three-dimensional boundary, capable of analyzing general rock engineering problems, was developed. In previous, the displacement discontinuity element used constant element. New , linear element substitute for constant element. Because each element has three node points, the behavior of rock is more accuracy. Besides, the Barton-Bandis criterion for non-linear joint was adopted to simulate weak planes in rock mass, the Hoek-Brown criterion was used to determined the yielding zone around the tunnels. The results show that linear displacement can decrease sixty percent mistakes.