|Table of Contents|

Calculation Method for Ductility Coefficient of Reinforced Concrete Beams(PDF)

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

Issue:
2019年06期
Page:
10-17
Research Field:
Publishing date:

Info

Title:
Calculation Method for Ductility Coefficient of Reinforced Concrete Beams
Author(s):
QU Wen-jun;  LIU Chuan-ming;  ZHU Peng
(College of Civil Engineering, Tongji University, Shanghai 200092, China)
Keywords:
reinforced concrete beam;  FRP bar;  ductility coefficient;  reinforcement ratio
PACS:
TU375.1
DOI:
-
Abstract:
Due to the fiber reinforced polymer(FRP)bars no yield state, the traditional ductility coefficient calculation method is not suitable for FRP reinforced concrete beams and hybrid reinforced(steel bars + FRP bars)concrete beams. In order to put forward a relatively perfect and unified method for calculating the ductility of reinforced concrete beams, the existing calculation methods of ductility coefficients of reinforced concrete beams were analyzed. According to the definition of ductility coefficient and the dynamic requirement, the formula of ductility coefficient-seismic force reduction coefficient(μ-C)relation of reinforced concrete structure was derived from the requirement of seismic resistance to ductility of structure. A method for calculating ductility coefficient of reinforced concrete beam was presented according to the formula of μ-C relation under equal displacement assumption. The effectiveness of the method was proved by comparing the calculated values with the experimental results. The factors affecting the ductility of reinforced concrete beams, such as the strength of concrete and reinforcement, the ultimate compressive strain of concrete, the effective reinforcement ratio and the ratio of reinforcement stiffness of FRP bars, were analyzed. The results show that the improvement of concrete strength and ultimate compressive strain is beneficial to the ductility of reinforced concrete beams, while the increase of reinforcement strength, effective reinforcement ratio and FRP reinforcement stiffness ratio has adverse effects on the ductility of reinforced concrete beams.

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Last Update: 2019-11-26