SHEAR STRENGTH OF REINFORCED DEEP BEAMS WITH MULTIPLE LAYERS OF LONGITUDINAL BARS

Abstract

Diaphragm walls for earth retaining during excavation have recently been used as a permanent component of the main body of a structure in increasing cases because of the advancement in construction technology and for economic reasons. The design method has also been established. When a diaphragm wall is applied as a component of the main body, multiple layers of longitudinal bars are arranged. In order to find a shear design method using such members, a unidirectional static loading test was conducted using beam-type specimens to make an experimental study of shear failure characteristics and shear strength where no shear reinforcement was applied. This paper reports the relationship of the number of layers of longitudinal bars and the reinforcement area to the shear failure characteristics obtained by the test, and proposes a shear strength calculation method.