Title:
Cyclic Performance of Lower Stories of Mid-Rise Reinforced Concrete Frame Buildings
Author(s):
Hakim Bechtoula, Masanobu Sakashita, Susumu Kono, Fumio Watanabe, and Marc O. Eberhard
Publication:
Structural Journal
Volume:
103
Issue:
4
Appears on pages(s):
513-521
Keywords:
buckling; crack; damage; elongation; frame; reinforced concrete; shear
DOI:
10.14359/16427
Date:
7/1/2006
Abstract:
This paper summarizes an experimental study on the cyclic behavior of the lower stories of a mid-rise reinforced concrete (RC) frame building. Two two-story frames with one bay were tested, each represents the lower two stories of an 11-story RC frame building. Both frames were designed in accordance with the Japanese design guidelines. The two frames differed only in the amount of variation of the axial loads. The tests demonstrated that, while the overall load-displacement behavior of the two frames differed only slightly, the first-story column shear varied greatly with the level of column axial load. The columns and beams elongated during both the tests, with the second-floor beam elongation exceeding 1.5% of the clear span of the beam. Axial load intensity affected the amount of cracking. Practical analytical models are proposed for predicting column elongation, based on a simple rocking model, and beam elongation, based on crack width evaluation.