scholarly journals ADDITIONAL DEFLECTION IN REINFORCED CONCRETE CANTILEVER BEAMS DUE TO SLIPPAGE OF BAR AT FIXED EDGE UNDER SUSTAINED LOADING

1995 ◽  
Vol 60 (467) ◽  
pp. 115-122 ◽  
Author(s):  
Yoshiteru OHNO ◽  
Zhenbao LI ◽  
Kazuo SUZUKI
Keyword(s):  
Reinforced Concrete ◽  
Cantilever Beams ◽  
Sustained Loading

scholarly journals Influence of steel–concrete bond damage on the dynamic stiffness of cracked reinforced concrete beams

2018 ◽  
Vol 21 (13) ◽  
pp. 1977-1989 ◽  
Author(s):  
Tengfei Xu ◽  
Jiantao Huang ◽  
Arnaud Castel ◽  
Renda Zhao ◽  
Cheng Yang
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beam ◽  
Natural Frequencies ◽  
Concrete Beams ◽  
Dynamic Stiffness ◽  
Reinforced Concrete Beam ◽  
Reinforced Concrete Beams ◽  
Reinforcing Bar ◽  
Sustained Loading ◽  
Inertia Model

In this article, experiments focusing at the influence of steel–concrete bond damage on the dynamic stiffness of cracked reinforced concrete beams are reported. In these experiments, the bond between concrete and reinforcing bar was damaged using appreciate flexural loads. The static stiffness of cracked reinforced concrete beam was assessed using the measured load–deflection response under cycles of loading and unloading, and the dynamic stiffness was analyzed using the measured natural frequencies with and without sustained loading. Average moment of inertia model (Castel et al. model) for cracked reinforced beams by taking into account the respective effect of bending cracks (primary cracks) and the steel–concrete bond damage (interfacial microcracks) was adopted to calculate the static load–deflection response and the natural frequencies of the tested beams. The experimental results and the comparison between measured and calculated natural frequencies show that localized steel–concrete bond damage does not influence remarkably the dynamic stiffness and the natural frequencies both with and without sustained loading applied. Castel et al. model can be used to calculate the dynamic stiffness of cracked reinforced concrete beam by neglecting the effect of interfacial microcracks.

Experimental identification of exponential damping for reinforced concrete cantilever beams

2019 ◽  
Vol 186 ◽  
pp. 161-169 ◽  
Author(s):  
Li Su ◽  
Sheng-Qi Mei ◽  
Yu-Hua Pan ◽  
Yuan-Feng Wang
Keyword(s):  
Reinforced Concrete ◽  
Cantilever Beams ◽  
Experimental Identification

Characterization of macrocrack propagation under sustained loading in steel fibre reinforced concrete

2015 ◽  
Vol 49 (3) ◽  
pp. 969-982 ◽  
Author(s):  
Dominic Daviau-Desnoyers ◽  
Jean-Philippe Charron ◽  
Bruno Massicotte ◽  
Pierre Rossi ◽  
Jean-Louis Tailhan
Keyword(s):  
Reinforced Concrete ◽  
Steel Fibre ◽  
Fibre Reinforced Concrete ◽  
Steel Fibre Reinforced Concrete ◽  
Sustained Loading

Device for Time-Varying Mechanical Performance of Columns under Coupling Effects of Load and Environment

2014 ◽  
Vol 578-579 ◽  
pp. 1567-1570
Author(s):  
Qiang Li ◽  
Jian Jiang ◽  
Jing Tong
Keyword(s):  
Reinforced Concrete ◽  
Mechanical Performance ◽  
Coupling Effect ◽  
Reinforced Concrete Structures ◽  
Time Varying ◽  
Measuring Instrument ◽  
Analog Device ◽  
Measuring Systems ◽  
Sustained Loading ◽  
Rebar Corrosion

To study the durability of reinforced concrete structures under coupling effect of load and environmental, an analog device is developed. Device includes sustained loading, accelerated environmental corrosion and measuring systems. The load applied to the column is real-time monitored by the pressure sensor and compensated according to the stiffness degradation and stress relaxation of column due to the rebar corrosion. Electrode is placed in the column so that the arrangement of the measuring instrument is not restricted. Device successfully realizes monitoring the time-varying mechanical performance degradation of reinforced concrete under the coupling effect of load and environment.

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