加勁擋土牆牆面變形之可靠度分析

Reliability Analysis of Performance of Reinforced Retaining Wall Face

魏君蓉(Jiun Rung Wei)

指導教授 ： 劉家男

國立暨南國際大學/科技學院/土木工程學系/碩士(2007年)

https://doi.org/10.6837/NCNU.2007.00252

摘要

加勁擋土牆之設計應著重於變形行為，計算其安全係數其實並不適合代表其工作性。本研究擬以數值分析方法來探討加勁擋土牆受靜態載重下作用下之變形行為。透過定論及機率式參數分析評估各參數及其變異性對加勁擋土牆變形之影響程度，參數分析之結果顯示影響加勁擋土牆變形之重要參數為土壤摩擦角與土壤單位重，土壤之彈性模數與加勁格網之勁度之影響性次之。本研究使用電腦應用程式FLAC 作為數值分析之軟體，分析加勁擋土結構物之牆頂靜態加載時之牆面變形性。以工作應力與性能分析為基礎，以蒙地卡羅模擬法考慮分析模型中大地材料與地工材料之不確定性，並建立加勁擋土結構物之可靠度分析流程。

關鍵字

性能可靠度蒙地卡羅模擬 ； 加勁擋土牆 ； FLAC

並列摘要

The face deformation is the major consideration for design of reinforced
retaining wall. In the study, we discuss the deformation behavior of reinforced
retaining wall under static loading using numerical method. The study of deterministic
and probabilistic parameters help to identify the effect of important parameters for the
deformation behavior of reinforced retaining wall. The results of parameters study
show that friction angle of soil and unit weight of soil are the most important
parameters for stability of retaining wall. The elastic modulus for soil and
geosynthetics are secondary factor of effect. The study adopts FLAC to analyze the
deformation behavior of reinforced retaining wall under static loading. M-C
simulation is applied to evaluate the uncertainty of geotechnical material and
geosynthetics. The procedure of reliablilty based design for reinforced retaining wall
is established base on simulated reliability of wall deformation.

並列關鍵字

reliability ； performance ； M-C simulation ； reinforced retaining wall ； FLAC

參考文獻

劉岫雲(2004)，「空間風險分析模式之建立與其在梨山崩他地之應用」，國立中興大學土木工程研究所碩士論文。

楊凱勝(2003)，「FLAC與STABL程式於邊坡定分析之比較研究」，中原大學土木工程學研究所碩士論文。

郭明瑋(2003)，「邊坡上基礎承載力之數值分析」，國立中央大學土木工程研究所碩士論文。

Bathurst, R.J., Walters, D., Vlachopoulos, N., Burgess, P., and Allen,T.M., (2000). “Full scale testing of geosynthetic reinforced walls,”. In Advances in Transportation and Geoenvironmental Systems Using Geosynthetics, Proceedings of Geo-Denver 2000, Denver, Colo., 5–8 August 2000. Edited by J.G. Zornberg and B.R. Christopher. American Society of Civil Engineers, Special Publication 103. pp. 201–217.

Bergado, D.T., Patron, B.C., Youyongwatana, W., Chai, J.C., and Yudhbir., (1994). “Reliability-based analysis of embankment on soft Bangkok clay,” Structural Safety, 13: 247–266.