Static and Dynamic Analysis of Flexible Pavement Embedded with CLSM Bases Using ANSYS

• Main Authors: SU,JIE-LIN, 蘇潔琳
• Other Authors: HUANG,LI-JHENG
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/y22sd5

碩士 === 國立高雄應用科技大學 === 土木工程與防災科技研究所 === 106 === Recently control low-strength materials (CLSM) had been vastly applied for pavement backfill due to the growth of environmental protection. This research is aimed at static and dynamic analysis of pavement embedded with CLSM bases using ANSYS (R17.2) which is a FEM-based analysis software. Advantages of CLSM include ease of compaction, excavation and backfill. The physical model considered includes asphalt surface layer and CLSM bases. The PLANE183 and SOLID186 elements are employed for two- and three-dimensional analysis, respectively. For comparison, four backfill materials will be studied: graded stones, CLSM-B80/30%, CLSM-B130/30%, and asphalt concrete. Numerical analyses and results are summarized as follows: (1) static analysis: the surface settlement and horizontal/vertical stresses in pavements using two kinds of CLSM are range between those using graded stones and asphalt concrete; maximal settlement using CLSM-B80/30% and CLSM-B130/30% are 0.79 and 0.49 of that using graded stone; (2) Modal analysis: natural frequencies from 3D models using CLSM-B80/30% and CLSM-B130/30% are 1.1 and 1.3 of that using graded stone; (3) seismic response analysis: with the tested ground accelerations of 1940 El Centro and 1995 Kobe, the maximal displacement, velocity and accelerations of pavement using CLSM-B80/30% and CLSM-B130/30% are 0.97 and 0.64 of that using graded stone. It can be concluded that CLSM can be employed as an appropriate replacement of graded stones for bases backfill in pavement construction with the compromise of energy saving, waste reduction and strength requirement.