Evaluation of Seismic Performances on Prestressed Composite Coupling Beams with Discontinuous Webs

Abstract

The shear wall system with coupling beams has been known as an effective means for moderate and high rise buildings up to 40 stories, because this structural system can provide the enhanced lateral stiffness compared to individual shear walls. Typical reinforced concrete coupling beams have difficulties in construction due to complicated reinforcing work on site, and steel coupling beams also have disadvantages in economical point of view because of a large number of stiffeners required for its stability under lateral loading. To overcome these disadvantages in existing coupling beam systems, this study developed the prestressed composite coupling beam with discontinuous webs, which have improved constructability, economic feasibility, and reduced sectional size. The reversed cyclic loading test on two prestressed composite coupling beams with discontinuous webs having different shear reinforcement ratios have been conducted to investigate their structural performances, and test results showed that the proposed composite coupling beams had good seismic performances.

Behavior and design of steel reinforced concrete (SRC) coupling beams: a review

“…Their test results indicated that SRC coupling beams with only anchor bolts exhibited more strengths than that calculated with current PCI Code. Oh et al [5] developed the prestressed composite coupling beams and conducted the tests on two prestressed composite coupling beams with different amount of shear reinforcements. Baek [6] proposed the SRC coupling beam with a steel hysteresis damper and investigated experimentally the seismic performance of the special coupling beam.…”

“…As shown in Figure 2, the proposed detail of embedment for SRC coupling beams was effective but as the embedment length increase, the strength and stiffness of SRC coupling beam were a little improved. Oh et al [5] introduced the prestressing system into SRC coupling beams to enhance the structural efficiency. Figure 3(a) shows the configuration and reinforcement details of prestressed SRC coupling beams.…”

“…Recently, various types of steel and concrete composite coupling beams have been proposed as viable alternatives to diagonally reinforced concrete coupling beams and the structural performance of these composite coupling beams was experimentally evaluated by many researchers. These composite coupling beams can be categorized as encased steel plate coupling beam, SRC coupling beam [2][3][4][5][6], structural steel concrete coupling beam, and concrete filled steel plate coupling beam.…”