Effects of Concrete Elastic Modulus and Readout Data from Different Gages on Interpretation of Axial Pile Loading Test of Drilled Shaft and Barrette

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基本資料

Project title

Code/計畫編號

MOST106-2221-E019-027

Translated Name/計畫中文名

混凝土彈性模數及不同監測儀器讀值對鑽掘樁及壁樁軸向載重試驗解讀與判釋影響之研究

Project Coordinator/計畫主持人

San-Shyan Lin

Funding Organization/主管機關

National Science and Technology Council

Co-Investigator(s)/共同執行人

廖振程

Department/Unit

Department of Harbor and River Engineering

Website

https://www.grb.gov.tw/search/planDetail?id=12243184

Year

2017

Start date/計畫起

01-08-2017

Expected Completion/計畫迄

31-07-2018

Bugetid/研究經費

574千元

ResearchField/研究領域

土木水利工程

"本研究計畫旨在針對鑽掘樁與壁樁的軸壓試驗結果及鑽掘樁的拉拔試驗結果之解讀，考量土壤及混凝土的性質均為非線性行為，以及不同監測儀器讀值對解讀與判釋基樁行為作深入探討。擬執行探討工作項目包含：1)比較樁身混凝土採用切線模數和割線模數，對分析軸力隨深度分布與單位樁身摩擦應力之影響；2)比較鋼筋計與位移計量測結果，分析試樁後軸力隨深度分布與單位樁身摩擦應力之差異； 3)採用混凝土切線模數解讀拉拔試樁結果，考量鋼筋與混凝土介面間之可能滑移或混凝土產生裂縫之影響；4)運用有限元素法分析軸壓與拉拔試驗時，採用切線或割線進行混凝土彈性模數分析，以便與傳統上採用常數混凝土彈性模數分析之結果作比較。此外，為瞭解壁樁試驗過程中樁身橫斷面的應力變化，將尋求一全尺寸壁樁樁載重計畫，擬於二至三個橫斷面增加鋼筋計數量至10 個甚至12 個鋼筋計，以利瞭解壁樁試樁時，樁身橫斷面之實際應力分布，以利後續軸力隨深度分布與單位樁身摩擦應力之分析。""This proposal is aim to investigate the effects of the concrete elastic modulus and the readout data obtained from different instrumented gages on the interpretation of axial loading test of drilled shaft and barrette. The intended works include: 1) effect of concrete tangent or secant elastic modulus on interpretation of axil load profile and frictional resistance along pile/soil interface; 2) effect of the data obtained from rebar stress meter or extensometer on interpretation of axil load profile and frictional resistance along pile/soil interface; 3) how to take into account the effect of grout/rebar slippage or concrete crack on the tensile test result; 4) effect of using tangent, secant or constant concrete modulus on interpretation of pile loading test using finite element analysis; 5) conduct a full scale barrette loading test with installed 10 to 12 rebar gages at two or three cross-section for better understanding of the stress distribution along cross-section of the test barrette during loading test."

DSpace CRIS

Effects of Concrete Elastic Modulus and Readout Data from Different Gages on Interpretation of Axial Pile Loading Test of Drilled Shaft and Barrette

基本資料

Description