Experimental Research on Effect of Hoop Reinforcement and Structural Slit to Seismic Performance of Reinforced Concrete Columns with Side Walls under Large Deformation
By Tatsuya Komuro, Masaya Hirosawa, Masaaki Takizawa and Hirosi Akai
Concrete Research and Technology
Vol.15, No.1, Jan 2004 (Issue 34)
- Synopsis:
- Authors report the test results of the 12 specimens of columns with side walls under repeated horizontal load with fixed axial force. Variables are the spacing of hoop, existence of eccentric connection of side walls to a column, existence of partial slits between the column and the side walls and difference of loading history. In this paper, we describe the failure mode influenced by the variables, strength deterioration ratio, torsional deformation by eccentric connection, axial load carrying capacity, damping performance, etc. And the test results were compared with the calculated values on strength and stiffness.
Resultantly, difference of hoop ratio and existence of the structural slit made difference of failure modes from total failure as a whole to separated failure of a column and side walls. And it was made clear that deformation ability was improved by the partial slit. Although strength can be presumed under some deviation from the existing evaluation methods, failure mode can be hardly presumed. - Keywords:
- column with side wall, spacing of hoop, partial slit, eccentric connection, loading history, large deformation
