The Effect of Alternative Reinforcement Details in Reinforced Concrete Coupling Beams

2013 ◽  
Vol 405-408 ◽  
pp. 865-868
Author(s):  
Wan Shin Park ◽  
Young Soo Chun ◽  
Hyun Do Yun ◽  
Soo Yeon Seo ◽  
Jin Gyu Song ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Shear Load ◽  
High Shear ◽  
Test Results ◽  
Coupling Beams ◽  
Replacement Ratio ◽  
Alternative Reinforcement ◽  
Design Alternative ◽  
Diagonal Reinforcement

In this study, a design alternative for reinforced concrete (RC) coupling beamswith diagonal headed-bars that puts less reliance on diagonal reinforcement wasexperimentally investigated. The results show that specimen HB 50 exhibits a better stable behavior incomparison with specimens CON and HB 30. Test results showed that specimens HB75 with replacement ratio of 75 % diagonal headed – bars were efficient inresisting high shear load.

scholarly journals Innovative methods of strengthening reinforced concrete structures

2018 ◽  
Vol 196 ◽  
pp. 04068
Author(s):  
Dmitry Mailyan ◽  
Darya Bogomazyuk
Keyword(s):  
Reinforced Concrete ◽  
External Force ◽  
Reinforced Concrete Structures ◽  
Test Results ◽  
Transverse Compression ◽  
Feasible Method ◽  
Strength Concrete ◽  
Innovative Methods ◽  
Diagonal Reinforcement ◽  
Relative Eccentricity

The article considers some of the most innovative methods of reinforced concrete compressed elements: strengthening of elements with the help of pre-compressed longitudinal reinforcing elements, strengthening by means of concrete padding device, of low strength concrete, to strengthen the elements by biaxial transverse compression of concrete and method is to strengthen the elements with a pre-stretched diagonal reinforcement. The test results on deformation and rigidity of compressed reinforced concrete pillars are given. For each variant of rack reinforcement, depending on their flexibility and the relative eccentricity of the external force, the most technologically and economically feasible method of amplification is proposed.

Cyclic Behavior of Slender Reinforced Concrete Coupling Beams with Bundled Diagonal Reinforcement

2015 ◽  
Vol 27 (6) ◽  
pp. 661-668
Author(s):  
Sang-Whan Han ◽  
Kyoung-Hwan Yoo ◽  
Ki-Hak Lee ◽  
Myoung-Su Shin
Keyword(s):  
Reinforced Concrete ◽  
Cyclic Behavior ◽  
Coupling Beams ◽  
Diagonal Reinforcement

The Numerical Simulation for Steel Plate Reinforced Concrete Coupling Beams Based on Abaqus

2014 ◽  
Vol 1065-1069 ◽  
pp. 1354-1357
Author(s):  
Dong Chen ◽  
Cheng Fan ◽  
Li Song
Keyword(s):  
Reinforced Concrete ◽  
Steel Plate ◽  
Numerical Study ◽  
Damage Model ◽  
Hysteresis Curve ◽  
Test Results ◽  
Coupling Beams ◽  
Tsinghua University ◽  
Model And Simulation ◽  
Actual Test

Based on the concrete plasticity damage model provide by the Abaqus, the subroutine PQ-fiber provided by the TsingHua University was used to build the model and simulation for the steel plate reinforced concrete (SPRC) coupling beams. The embedded column and steel plate stress nephogram, concrete stress nephogram and hysteresis curve which was get after the simulation and which were compared with the actual test, the simulation results can fit the actual test results better, which provide some userful reference for the numerical study for the steel plate reinforced concrete coupling beams.

Adding an expansive agent to increase the toughness of steel fibre reinforced concrete

2019 ◽  
Vol 26 (4) ◽  
pp. 197-208
Author(s):  
Leo Gu Li ◽  
Albert Kwok Hung Kwan
Keyword(s):  
Reinforced Concrete ◽  
Steel Fibre ◽  
The Other ◽  
Fibre Reinforced Concrete ◽  
Test Results ◽  
Compressive Properties ◽  
Shrinkage Cracking ◽  
Steel Fibre Reinforced Concrete ◽  
Expansive Agent ◽  
Concrete Matrix

Previous research studies have indicated that using fibres to improve crack resistance and applying expansive agent (EA) to compensate shrinkage are both effective methods to mitigate shrinkage cracking of concrete, and the additions of both fibres and EA can enhance the other performance attributes of concrete. In this study, an EA was added to fibre reinforced concrete (FRC) to produce concrete mixes with various water/binder (W/B) ratios, steel fibre (SF) contents and EA contents for testing of their workability and compressive properties. The test results showed that adding EA would slightly increase the superplasticiser (SP) demand and decrease the compressive strength, Young’s modulus and Poisson’s ratio, but significantly improve the toughness and specific toughness of the steel FRC produced. Such improvement in toughness may be attributed to the pre-stress of the concrete matrix and the confinement effect of the SFs due to the expansion of the concrete and the restraint of the SFs against such expansion.

On axial compressive behavior of steel fiber reinforced concrete confined by FRP

2021 ◽  
pp. 136943322098165
Author(s):  
Hossein Saberi ◽  
Farzad Hatami ◽  
Alireza Rahai
Keyword(s):  
Reinforced Concrete ◽  
Experimental Test ◽  
Steel Fiber ◽  
Experimental Tests ◽  
Fiber Reinforced Concrete ◽  
Steel Fibers ◽  
Test Results ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete ◽  
Frp Confinement

In this study, the co-effects of steel fibers and FRP confinement on the concrete behavior under the axial compression load are investigated. Thus, the experimental tests were conducted on 18 steel fiber-reinforced concrete (SFRC) specimens confined by FRP. Moreover, 24 existing experimental test results of FRP-confined specimens tested under axial compression are gathered to compile a reliable database for developing a mathematical model. In the conducted experimental tests, the concrete strength was varied as 26 MPa and 32.5 MPa and the steel fiber content was varied as 0.0%, 1.5%, and 3%. The specimens were confined with one and two layers of glass fiber reinforced polymer (GFRP) sheet. The experimental test results show that simultaneously using the steel fibers and FRP confinement in concrete not only significantly increases the peak strength and ultimate strain of concrete but also solves the issue of sudden failure in the FRP-confined concrete. The simulations confirm that the results of the proposed model are in good agreement with those of experimental tests.

Finite Element Analysis of Reinforced Concrete Beams with Exterior FRP Shell

2011 ◽  
Vol 243-249 ◽  
pp. 1461-1465
Author(s):  
Chuan Min Zhang ◽  
Chao He Chen ◽  
Ye Fan Chen
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Reinforced Concrete ◽  
Concrete Beams ◽  
Reinforced Concrete Beams ◽  
Test Results ◽  
Contact Interface ◽  
Accurate Calculation ◽  
Element Analysis

The paper makes an analysis of the reinforced concrete beams with exterior FRP Shell in Finite Element, and compares it with the test results. The results show that, by means of this model, mechanical properties of reinforced concrete beams with exterior FRP shell can be predicted better. However, the larger the load, the larger deviation between calculated values and test values. Hence, if more accurate calculation is required, issues of contact interface between the reinforced concrete beams and the FRP shell should be taken into consideration.

scholarly journals Punching Shear Strength of Reinforced Concrete Flat Plates with GFRP Vertical Grids

2021 ◽  
Vol 11 (6) ◽  
pp. 2736
Author(s):  
Min Sook Kim ◽  
Young Hak Lee
Keyword(s):  
Shear Strength ◽  
Reinforced Concrete ◽  
Fiber Reinforced Polymer ◽  
Punching Shear ◽  
Test Results ◽  
Shear Reinforcement ◽  
Flat Plates ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced ◽  
Vertical Grids

In this study, the structural behavior of reinforced concrete flat plates shear reinforced with vertical grids made of a glass fiber reinforced polymer (GFRP) was experimentally evaluated. To examine the shear strength, experiments were performed on nine concrete slabs with different amounts and spacings of shear reinforcement. The test results indicated that the shear strength increased as the amount of shear reinforcement increased and as the spacing of the shear reinforcement decreased. The GFRP shear reinforcement changed the cracks and failure mode of the specimens from a brittle punching to flexure one. In addition, the experimental results are compared with a shear strength equation provided by different concrete design codes. This comparison demonstrates that all of the equations underestimate the shear strength of reinforced concrete flat plates shear reinforced with GFRP vertical grids. The shear strength of the equation by BS 8110 is able to calculate the punching shear strength reasonably for a concrete flat plate shear reinforced with GFRP vertical grids.

Design Forces for Drift and Damage Control: A Second Look at the Substitute Structure Approach

1994 ◽  
Vol 10 (2) ◽  
pp. 319-331 ◽  
Author(s):  
John F. Bonacci
Keyword(s):  
Reinforced Concrete ◽  
Damage Control ◽  
Dynamic Test ◽  
Frame Structures ◽  
Rc Frame ◽  
Test Results ◽  
Structure Approach ◽  
Maximum Displacement ◽  
Design Loads ◽  
Rc Frame Structures

This paper explores the development of a method that is useful for design of reinforced concrete (RC) frame structures to resist earthquakes. The substitute structure method, originally proposed in the 1970s, makes an analogy between viscously damped linear and hysteretic response for the purpose of estimating maximum displacement. The evolution of the method is retraced in order to emphasize its unique reliance on experimental results, which are needed to establish rules for assignment of substitute linear properties. Recent dynamic test results are used to extend significantly the calibration of the method, which furnishes design loads on the basis of drift and damage control.

Sign in / Sign up

Export Citation Format

Share Document