Behavior of Geosynthetic-Reinforced Retaining Wall under Static and Dynamic Conditions with Secondary Reinforcement using Finite Element Method

• Main Authors: Bing-RuWu, 吳秉儒
• Other Authors: Ching Hung
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/9js45w

碩士 === 國立成功大學 === 土木工程學系 === 107 === Applications of geosynthetic reinforcements are commonly designed with a vertical spacing of 0.6 meters. This relatively large spacing may lead to a high reinforcement connection strength and result in connection failure. To alleviate the primary reinforcement axial force, secondary reinforcements set between primary reinforcement have recently been utilized. Such design has been proved to show some good performance under working stresses, however, the research on the seismic effect of the secondary reinforcement layer and the relationship between the primary reinforcement layer are still lacking. This study aims to investigate the effect of secondary reinforcement under static and dynamic conditions. Seismic behaviors of retaining wall with or without secondary reinforcement are evaluated and discussed considering various wall heights and primary reinforcement lengths. Under the static condition, the results show that the secondary reinforcement layers can reduce both the maximum axial force of primary reinforcement and the wall displacement under construction stresses, capable of improving the overall stability of geosynthetic-reinforcement soil structures. Under the dynamic condition, the secondary reinforcement can effectively reduce the axial force of the primary reinforcement, greatly reducing the possibility of damages caused by the excessive axial force of the main reinforcement. It is also revealed that secondary reinforcement has a relatively small impact on the displacement and settlement of the walls.