研究生: |
周志昇 Chih-Sheng Chou |
---|---|
論文名稱: |
鄰坡建築之力學行為探討 Engineering Behavior of Building Near Slope |
指導教授: |
陳志南
Chee-Nan Chen |
口試委員: |
陳立憲
none 陳堯中 none 林志森 none |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 營建工程系 Department of Civil and Construction Engineering |
論文出版年: | 2009 |
畢業學年度: | 97 |
語文別: | 中文 |
論文頁數: | 180 |
中文關鍵詞: | 邊坡 、力學 、退縮距離 |
外文關鍵詞: | recessional distances |
相關次數: | 點閱:126 下載:1 |
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本研究針對坡地建築,分析建物興建對坡地整體之應力傳遞與變形發展,探討鄰近坡地建物之力學行為。本研究利用FLAC軟體建立數值模式,於特定之建物基礎寬度(B=16m) 及邊坡(坡角34。、坡高20m、地層c=0、ψ=38。)情況下,就四種不同退縮距離(B/8、B/4、B/2、B)分析,探討邊坡及基礎下方整體應力傳遞與變形發展機制。
分析結果發現於研究範圍中,於退縮距離≦B/2時,最大主應力等壓線在鄰近邊坡之基礎下方有明顯扭曲現象,而非如平地建物之蔥形分佈。有關坡地建築承載由小至大之破壞發展機制,本研究發現當建物載重不大時邊坡坡面及基礎底部的水平位移ΔX不到垂直位移ΔY的十分之一,且ΔX與ΔY之等位移線皆對基礎中心呈左右對稱之分佈類似水平地表;當載重持續增加時坡面及基礎底部之ΔX增加趨勢大於ΔY之增加趨勢,當載重持續增加至破壞時,ΔX與ΔY之差距已拉近至ΔY/ΔX≦1.89,顯示破壞時建物基礎下方之沉陷與鄰近邊坡之水平推擠已相當明顯,可作為坡地建築現地監測及安全評估之參考。
This aim of the study is to fully understand the overall mechanical behavior of a building near slope. The stress distribution and transmission deformation development in the soil mass due to foundation construction are investigated. Numerical analyses using the code FLAC to simulate of a building with near slope on the assumed conditions were performed using the code FLAC. The slope angle is 34。with slope height 20m. The shear strength parameters of soil slope are c=0 and ψ=38。 . Four different recessional distances of B/8,B/4,B/2 and B are selected where B=16m is the width of the building.
The analytic results show that the contour of equalized maximum principal stress after building construction has significant distortion near slope if recessional distance is less than B/2. This distortional shape makes large difference with smooth bulb shape of foundation construction on horizontal ground surface. The mechanisms of building near slope may analyze the horizontal displacement ΔX and vertical displacement ΔY beneath the foundation and on the slope surface. It is found that ΔX is less than one-tenth of ΔY when foundation loading is quite small, both ΔX andΔY contours are symmetric the vertical central line of foundation. This is similar as foundation on horizontal ground surface. The displacement difference between ΔX andΔY becomes small when foundation loading continuously increase. Finally, ΔY/ΔX of foundation can be reached to 1.89 when failure happens by foundation loading increasing. The obvious interaction between foundation and slope is found, and the corresponding ΔX andΔY can be monitoring in the field to assess the safety of buildings near slope.
1.Das著,周毅、洪明瑞、林登峰、遊振棋、彭根隆 譯,土壤力學與基礎工程,高立圖書有限公司,(2000)。
2.內政部營建署,建築技術規則,營建雜誌社,台北(1998)。
3.林啟鈺,「橫向等向性岩層承受地表條形荷重所衍生應力增量之數值推估」,碩士論文,中原大學土木工程研究所,中壢(2002)。.
4.林澄清,「坡地建築物退縮邊坡安全合理距離之研究」,建築學報,第46期,pp.135-152,(2004)。
5.林煒僑,「順向坡與斜交坡之降挖機制探討」,碩士論文,國立台灣科技大學營建工程技術研究所,台北(2002)。
6.張石角,「台灣山坡地建築區地質災害個案研究計畫(一、二、三期)」,中華民國工程環境學會,(1989)。.
7.張吉佐、陳志浩,「坡地災害與防制」,都會區及周緣環境地質資料庫產製及防災研討會,(2007)
8.廖瑞堂,「山坡地護坡工程設計」,科技圖書,台北(2001)。
9.郭俊何,「順向坡開發之工程穩定性探討」,碩士論文,國立台灣科技大學營建工程技術研究所,台北(2000)。
10.吳宗達,「不同退縮距離對坡地建物之應力傳遞與變形探討」,碩士論文,國立台灣科技大學營建工程技術研究所,台北(2000)
11.歐章煜,「深開挖工程-分析設計理論與實務」,科技圖書,台北(2004)。
12.陳廣揮,「土壤垂直應力增量電腦程式數值理論之探討」,中興工程,第90期,pp.21-27,(2006)。
13.陳譽中,「波地滑動面之可靠評估方式探討-以五彎仔地滑為例」,碩士論文,國立台灣科技大學營建工程技術研究所,台北(2005)。
14.「地滑對策技術設計實施要領」,日本地滑對策技術協會,日本,(1978)。
15.中國土木水利工程學會,「地錨設計與施工準則暨解說」,科技圖書,台北(1998)。
16.Boussinesq, J., “Villars Application des Potentials a L’Etude de L’Equilibre et du Mouvement des Solides Elastiques,” Gauthier-Villars. (1885).
17.Chowdhury,R.N., Slope Analysis, Elsevier Scientific publishing Company,(1978).
18.Itasca Consulting Group, Inc., Fast Lagrangian Analysis of Continua, User’s manual, Minneapolis, Minnesota, U.S.A (2006).
19.Itasca Consulting Group, Inc., Fast Lagrangian Analysis of Continua, Example Application, Minneapolis, Minnesota, U.S.A (2006).
20.Itasca Consulting Group, Inc., Fast Lagrangian Analysis of Continua, Command Reference, Minneapolis, Minnesota, U.S.A (2006).
21.Jurgenson, L. “ The Application of Theories of Elasticity and Plasticity to Foundation Problems,” in Contribution to Soil Mechanics, 1925-1940, Boston Society of Civil Engineers, Boston. (1934).
22.Lambe, T.W., and Marr, W.A., “ Stress Path Method:Second Edition,” Journal of the Geotechnical Engineering Division, ASCE,VOL.105,No. GT6, pp.727-738, (1979).
23.McCarthy David F.,Essentials of Soil Mechanics and Foundations, sixth edition.Prentice Hall (2002).
24.Newmark, N. M.:“Influence Chart for Computation of Stresses in Elastic Soil, ” University of Illinois Engineering Experiment Station, Bulletin No.338 (1942).
25.Poulos H. G. and Davis E. H.,Elastic Solutions for Soil and Rock Mechanics,(1974).
26.Varnes,D.J., Slope movement types and processes, in Schuster,R.L., and Krizek, R.J.(eds), Landslide, Analysis and Control, (1978).