Structural Improvement of Shear Wall Coupled RC Beam Replaced with HPFRCC

Document Type : Research Article

Authors

Faculty of Civil Engineering, Semnan University, Semnan, Iran

Abstract

Coupling beams made of high performance fiber reinforced cementinous composite (HPFRCC) are capable alternative compared to traditional concrete and resulting to increasing capacity, ductility, energy dissipation and also reducing the congested amount of longitudinal, transverse and diagonal reinforcement. This article investigate the influence of HPFRCC replacement with normal concrete in coupled shear wall with connecting beam. The first specimen of coupling beams designed and made with normal concrete and second specimen of coupling beams designed and made with HPFRCC and tested under cyclic loading. The results indicated that HPFRCC increased tensile capacity of concrete, prevented the increasing the crack widths and increased absorbed energy. also increased rigidity compared to plain concrete specimen and shear-tensile failure was changed to shear-slippage failure. amount of shear strength for HPFRCC coupling beams were 117 percent than normal concrete and the use of fibers increased the energy absorption about 60 percent.

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