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《Earthquake Resistant Engineering and Retrofitting》 2010-01
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Experimental Research for the New Method to Determine Real Stress of Steel Bars in Members of Reinforced Concrete Structure

Li Zhi-wen,Pan Li(Institude of Building Structures,China Academy of Building Research,Beijing 100013,China)  
Professor Pan Li,who is working in China Academy of Building Research,creates a new method which can solve the problem above and is briefly introduced as follows.Drill a small hole on the steel bars to be measured,then force the impaired section to get a strain increment Δε_s.Enlarge the hole at the same position for more times to get the[Δε_ s,i ] array.In elastic range,based on deduced functions between real stress σ_s of steel bar and [Δε_ s,i ],similar σ_s values can be gained from calculations.A finite element analysis on the new method is presented in this paper.Based on the finite element analysis,tension tests of 18 steel bars in different diameters and holes are carried out.The results of tests,which are according with that of finite element analysis,validate the new method to determine real stresses of steel bars by drilling/enlarging small holes.Furthermore,some suggestions in using of the new method are given.
【CateGory Index】: TU375
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【Citations】
Chinese Journal Full-text Database 3 Hits
1 Pan Li, (Institute of Building Structures, China Academy of Building Research);A NEW METHOD OF MEASURING THE REAL STRESS OF REINFORCEMENT IN LOADED BUILDING STRUCTURES[J];Industrial Construction;1991-09
2 ;THE MEASUREMENT METHOD OF THE REINFORCING BAR'S STRESS INSIDE THE CONCRETE STRUCTURE[J];Architecture Technology;2003-05
3 PAN Li(Institute of Building Structures,China Academy of Building Research,Beijing 100013,China);New Method of Determining Actual Internal Forces in the Member of Reinforced Concrete Structures[J];Building Science;2009-07
【Secondary Citations】
Chinese Journal Full-text Database 1 Hits
1 Pan Li, (Institute of Building Structures, China Academy of Building Research);A NEW METHOD OF MEASURING THE REAL STRESS OF REINFORCEMENT IN LOADED BUILDING STRUCTURES[J];Industrial Construction;1991-09
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