運用有限元程式模擬加勁材拉出行為之可行性研究

Feasibility Study of Finite Element Method Simulation of Large-scale Pull-out Test

張達徳(Ta-Teh Chang) ； 王淳讙(Chwen-Huan Wang) ； 方力(Li Fang)

《先進工程學刊》 15卷3期 (2020/10) Pp. 121-128

摘要

加勁土壤結構物中土壤與加勁材介面間的力學機制評估尤為重要。拉出試驗通過改變正向應力的大小與加勁材埋置長度等條件，可以更好的模擬現地加勁結構物受力後的應力－應變特性。但進行拉出試驗評估需耗費大量的人力與時間，因此本研究借用有限元素程式模擬加勁材（地工格網）的拉出行為，將模擬值與拉出試驗結果進行比對，希望藉由程式模擬替代室內試驗,期望達到節省人力成本及降低試驗時的人為誤差的可能性。

關鍵字

加勁土壤結構物 ； 拉出試驗 ； 有限元素

並列摘要

The evaluation of the Reinforced soil retaining structure between the soil and the stiffener interface in the stiffened soil structure is particularly important. The pull-out test can better simulate the stress-strain characteristics of the on-site stiffening structure by changing the magnitude of the normal stress and the embedding length of the geosynthetic material. However, it takes a lot of manpower and time to perform the pull-out test evaluation. Therefore, this study uses a finite element program to simulate the pull-out behavior of geosynthetics (geogrid), and compares the simulated value with the pull-out test results. Hopefully It is expected to save labor costs and reduce the possibility of human error during the test by replacing the indoor test with program simulation.

並列關鍵字

reinforced soil retaining structure ； pull-out test ； finite element method