| Title |
Flexural Behaviors of Half Precast Ductile Fiber Reinforced Cementitious Composites Beam |
| Authors |
Yang Il-Seung ; An Hyun-Jin ; Hwang Sung-Chul ; Kim Soon-Chul ; Moon Youn-Joon |
| Keywords |
Half Precast ; Ductile Fiber Reinforced Cementitious Composites ; Hybrid ; Flexural Behaviors ; Durability |
| Abstract |
In the past, plywood form-work needed various equipments, accessories, special labor, and complicate processes. The precast form, however, could cut down the process of form-work, the period of construction, and the labor cost. The precast form also promotes productivity and economical efficiency. The objective of this investigation is to study the elasto-plastic behavior of concrete beams using precast ductile fiber reinforced cementitious composite(DFRCCs) form-work subjected to repeated vertical load. DFRCCs with micro PolyVinyl Alcohol (or Polypropylene) fibers showed multiple cracks and pseudo strain hardening during the failure process under bending moment. The hybrid beam, which normal concrete is filled in half precast DFRCCs form, expected that half precast DFRCCs form raises durability of concrete and structural properties. The specimens are assorted the beam using half DFRCCs form, DFRCCs beams using PolyVinyl Alcohol fibers and Polypropylene fibers, and general reinforced concrete beam. The length of specimens is 2,020mm, the section is 170x250(mm), the thickness of the DFRCCs form is 35mm, the main bar is D16, the tie bar is D6. The research results clearly showed that proposed hybrid beams showed stable hysterisis behaviors than normal concrete beam. Test specimens using DFRCCs seemed to have been significantly damaged at a first glance. Micro cracks in specimens using DFRCCs, however, dispersed to form multiple cracking. |