Author(s)

T. Sagawa, D. Ishii, S. Sakamoto, H. Ito, K. Fukuda, Y. Ichinohe

Abstract

The authors proposed the hybrid tuber structure with steel reinforced concrete wall-column and steel beam in order to realize a versatile space in a building. The peripheral frame in this structure consists of a steel reinforced concrete wall-column and a peripheral steel beam just embedded to the wall-column, resulting in a rigid connection. In the orthogonal direction of the peripheral frame, a long spanned steel beam is rigidly connected by welding to the H-shaped steel inside the wall-column. This paper investigates the bearing stress transfer mechanism in the in-plane direction of the wall-column. A total number of seven beam-column joint specimens, in half scale of the actual structure, were tested under cyclic loading to simulate the seismic loads. The test parameters include the width and depth, and the embedded length of the steel beam. Based on experimental knowledge, the authors propose the design formula for the structure in terms of the ultimate strength and bearing capacity of concrete.

Keywords

hybrid structure, steel beam, steel reinforced concrete wall-column, cyclic loading, bearing fracture, bearing stress transfer mechanism