高强溷凝土性能研究_-_应力_-_应变行为_-_Stress-Strain_Behavior_of_High-Strength_Concrete.pdf

ACI STRUCTURAL JOURNAL TECHNICAL PAPER Title no. 98-S38 Stress-Strain Behavior of High-Strength Concrete Confined by Ultra-High- and Normal-Strength Transverse Reinforcements by Li Bing, R. Park, and H. Tanaka When high-strength concrete is used for reinforced concrete mem- reinforcement can effectively increase the ductility of rein- bers subjected to seismic loading, it is more difficult to achieve forced concrete columns. Ultra-high-strength transverse re- ductile behavior of such members than when normal-strength con- inforcement is especially used for columns with high- crete is used. In this paper, an experimental study of a number of strength concrete. quasi-static axial loading tests on high-strength concrete speci- mens confined by various amounts of transverse reinforcement is described. The main parameters were concrete strengths ranging RESEARCH SIGNIFICANCE from 35.2 to 82.5 M Pa and yield strength of Grade 430 and 1300 The most fundamental issue in predicting the behavior of transverse reinforcement. A stress-strain relationship for confined reinforced concrete members is the stress-strain behavior of high-strength concrete is proposed that is found to give reasonably the constituent materials. Concrete is used to resist compres- good prediction of the experimental behavior of circular and sion and its behavior in compression is important to the de- square specimens with high-strength concrete confined by either signer. If the behavior of concrete subjected to uniaxial normal- or ultra-high-yield-strength with various configurations. compression is known, the flexural behavior of reinforce