EFFECT OF TRANSVERSE PRESTRESSING ON SHEAR BEHAVIORS OF HIGH-STRENGTH CONCRETE COLUMNS
Experiments and 3-D FEM analyses were performed on high-strength concrete columns laterally prestressed by high-strength shear reinforcement in order to study the influence of active confinement on the shear strength and crack behaviors. Lateral prestress was introduced in proportion to the concrete strength, and the width of every crack near the transverse reinforcement was measured by a digital microscope. By increasing the lateral prestress as mentioned above, the shear crack strength and ultimate shear strength increased, but the effectiveness of active confinement was weakened as the axial force ratio decreased. FEM analyses can be used to evaluate the shear crack strength and the ultimate shear strength, and to explain the effect of active confinement on shear behaviors because FEM analyses evaluates the intensity of confinement in a tri-axial state of stress with minor principal stress as well as the degree of damage for compressive failures.
High-strength concrete Lateral prestress Active confinement Shear behavior
Y. Shinohara
Assoc. Professor, Structural Engineering Research Center, Tokyo Institute of Technology, Yokohama, Japan
国际会议
14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)
北京
英文
2008-10-12（万方平台首次上网日期，不代表论文的发表时间）