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

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Project title

Code/計畫編號

MOST107-2221-E019-007

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軸向載重試驗解讀與判釋影響之研究(II)

Project Coordinator/計畫主持人

San-Shyan Lin

Funding Organization/主管機關

National Science and Technology Council

Department/Unit

Department of Harbor and River Engineering

Website

https://www.grb.gov.tw/search/planDetail?id=12620039

Year

2018

Start date/計畫起

01-08-2018

Expected Completion/計畫迄

31-07-2019

Bugetid/研究經費

554千元

ResearchField/研究領域

土木水利工程

本研究計畫旨在針對鑽掘樁的軸壓試驗結果及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。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. 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。

Keyword(s)

鑽掘樁
軸壓試驗
拉拔試驗
有限元素法
drilled shaft
finite element method
axial compressive test
pullout test

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

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