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Flexural Behaviors Test and Capacity Analysis of Ultra High Strength Rebar Reinforced Engineered Cementitious Composites Beams(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2020年06期
Page:
38-45
Research Field:
Publishing date:

Info

Title:
Flexural Behaviors Test and Capacity Analysis of Ultra High Strength Rebar Reinforced Engineered Cementitious Composites Beams
Author(s):
ZHANG Yi-ping1;  LI Bi-xiong2;  LIAO Qiao3;  ZHOU Lian1;  TANG Li-na1
1. Sichuan Provincial Architectural Design and Research Institute Co., Ltd, Chengdu 610000, Sichuan, China; 2. Key Laboratory of Deep Earth Science and Engineering, Ministry Education, Sichuan University, Chengdu 610065, Sichuan, China; 3. College of Civil Engineering, Tongji University, Shanghai 200092, China
Keywords:
engineered cementitious composite;  ultra high strength rebar;  flexural behavior;  bearing capacity;  reinforcement ratio
PACS:
TU375.1
DOI:
-
Abstract:
In order to further study the flexural behaviors of ultra high strength rebar reinforced engineered cementitious composites(UHSRRE)beams which consist of engineered cementitious composites(ECC)and ultra high strength rebar, three UHSRRE beams, one reinforced engineered cementitious composites(RECC)beam and one reinforced concrete(RC)beam were tested, respectively. The experimental phenomena, ECC strains, ductility and characteristic moment of these beams were carefully analyzed. The results show that UHSRRE beams and RECC beams have a strong crack control ability compared with RC beams. In comparison with RECC beams, UHSRRE beams containing ultra high strength reinforcement have no obvious decrease in crack control ability. The cross-section strains of UHSRRE beams basically conform to the plane section assumption of mean strain, and ECC in the tension zone of UHSRRE beams is effective after cracking. With the increase of longitudinal reinforcement ratio, the ECC strains at the edge of compressive zone, maximum tensile strain of ECC at the edge of tensile zone, height of compressive zone and characteristic moment(except for cracking moment)of UHSRRE beams enlarge, but energy ductility coefficient increases first and then decreases. The ductility of UHSRRE beams is better than that of RECC beams when the reinforcement ratio is appropriate.

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