Quantitative Evaluation of the Relationship between Tensile Crack and Shear Movement in Concrete Beams

2012 ◽  
Vol 626 ◽  
pp. 355-359 ◽  
Author(s):  
Shahiron Shahidan ◽  
Rhys Pullin ◽  
Karen M. Holford ◽  
Norazura Muhamad Bunnori ◽  
Md Noor Noorsuhada
Keyword(s):  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Visual Observation ◽  
Test Results ◽  
Tensile Cracks ◽  
Damaged Zone ◽  
Crack Classification ◽  
Post Test ◽  
The Relationship ◽  
Ae Signals

This paper investigates the use of acoustic emission (AE) to identify tensile cracks and shear movements in concrete structures. The analysis of AE signals detected during a concrete beam investigation mainly focused on the relationship between signal parameters namely rise time, amplitude, duration and counts. This method allowed crack classification and shear movements to be identified. A laboratory experiment test was completed on a reinforced concrete beam (150 x 250 x 1900 mm). During testing AE data was captured and analysed post-test. Results from the most severely damaged zone, based on visual inspection, was analysed. The results indicated that tensile cracks developed though out the area of analysis, as confirmed by visual observation and relatively little shear movement occurred as would be expected in a reinforced beam.

scholarly journals Labelling Improves False Belief Understanding. A Training Study

2013 ◽  
Vol 16 ◽  
Author(s):  
Elisabet Serrat Sellabona ◽  
Carles Rostan Sánchez ◽  
Eduard Vallès Majoral ◽  
Moisès Esteban Guitart ◽  
Francesc Sidera Caballero ◽  
...  
Keyword(s):  
False Belief ◽  
Control Group ◽  
Test Results ◽  
Training Study ◽  
Linguistic Experience ◽  
Training Conditions ◽  
Remarkable Improvement ◽  
False Belief Understanding ◽  
Post Test ◽  
The Relationship

AbstractA total of 104 children aged between 41 and 47 months were selected to study the relationship between language and false belief understanding. Participants were assigned to four different training conditions: discourse, labelling, control (all with deceptive objects), and sentential complements (involving non-deceptive objects). Post-test results showed an improvement in children’s false belief understanding in the discourse and the labelling conditions, but not in the sentential complements with non-deceptive objects or the control group. Furthermore, the most remarkable improvement in false belief understanding occurred in the labelling group. These results suggest that some types of linguistic experience promote the development of false belief understanding, provided that differing perspectives are confronted.

scholarly journals Load Bearing Capacity Calculation of the System “Reinforced Concrete Beam – Deformable Base” under Torsion with Bending

2019 ◽  
Vol 97 ◽  
pp. 04059 ◽  
Author(s):  
Alexey Dem’yanov ◽  
Vladymir Kolchunov ◽  
Igor Iakovenko ◽  
Anastasiya Kozarez
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Cross Sections ◽  
Concrete Beam ◽  
Equations Of State ◽  
Reinforced Concrete Beam ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Deformable Base ◽  
The Relationship

It is presented the formulation and solution of the load bearing capacity of statically indeterminable systems “reinforced concrete beam – deformable base” by spatial cross-sections under force and deformation effects. The solution of problem is currently practically absent in general form. It has been established the relationship between stresses and strains of compressed concrete and tensile reinforcement in the form of diagrams. The properties of the base model connections are described based on a variable rigidity coefficient. It is constructed a system of n equations in the form of the initial parameters method with using the modules of the force (strain) action vector. The equations of state are the dependences that establish the relationship between displacements which are acting on the beam with load. Constants of integration are determined by recurrent formulas. It makes possible to obtain the method of initial parameters in the expanded form and, consequently, the method of displacements for calculating statically indefinable systems. The values of the effort obtained could be used to determine the curvature and rigidity of the sections in this way. It is necessary not to set the vector modulusP, the deformation is set in any section (the module is considered as an unknown) during the problem is solving. This allows us to obtain an unambiguous solution even in the case when the dependence M–χ has a downward section, i.e one value of moment can correspond to two values of curvature.

Study on Impaired Reinforced Concrete Beams Strengthening with Externally Steel Frame

2013 ◽  
Vol 438-439 ◽  
pp. 477-481
Author(s):  
Feng Lan Li ◽  
Xiong Huai Yu ◽  
Cheng Chen ◽  
Song Chen
Keyword(s):  
Reinforced Concrete ◽  
Cross Section ◽  
Concrete Beam ◽  
Steel Plate ◽  
Reinforced Concrete Beam ◽  
Steel Frame ◽  
Reinforced Concrete Beams ◽  
Test Results ◽  
Externally Bonded ◽  
Strengthening Method

A large impaired reinforced concrete beam with cracks was strengthened under self-weight action by the externally bonded steel frame composed with bottom steel plate and side hoop steel belts. The normal service loading behaviors of this beam were tested to verify the effectiveness of this strengthening method specified in current Chinese design code. Based on the analyses of test results, it can be concluded that: the deformation of flexural cross section of this beam fitted the assumption of plain cross section, the steel plate could effectively enhance the flexural stiffness and decrease the deflection of this beam, no new cracks appeared under the normal service loads, the cracks at bottom of this beam were more confined by the steel frame than those at web zone. Therefore, other measure should be taken to avoid the opening of web cracks.

scholarly journals Studi Kapasitas Lendutan, Daktalitas, dan Kekakuan pada Balok Beton Bertulang yang Diperkuat GFRP-S dengan Perendaman Air Laut Selama Satu Tahun

2019 ◽  
Vol 5 (2) ◽  
pp. 112
Author(s):  
Asri Mulya Setiawan ◽  
Erniati Bachtiar
Keyword(s):  
Test Object ◽  
Concrete Beam ◽  
Sea Water ◽  
Water Immersion ◽  
Reinforced Concrete Beam ◽  
Test Method ◽  
The Other ◽  
Test Results ◽  
Loading Method ◽  
Simple Supports

This study aims to analyze the deflection capacity, ductality and stiffness of reinforced concrete beam structures reinforced by GFRP with sea water immersion for 1 year. The test method used is a monotonic loading method that uses two simple supports over the test object and is pressed at a constant ramp actuator speed of 0.05 mm / sec until the concrete beam fails. The test results show that BF0 is more ductile compared to BF6 and BF12. This can be seen the existing deflection, where BF0 has a deflection that tends to be larger than the other beams. In BF0 specimens, the load that is able to hold is greater than BN specimens, but the resulting deflection is also greater

scholarly journals Flexural Behavior of Bamboo Reinforced Concrete Beam with Steel Stirrups

2019 ◽  
Vol 8 (4S2) ◽  
pp. 97-99
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beam ◽  
Concrete Beams ◽  
Reinforced Concrete Beam ◽  
Flexural Behavior ◽  
Test Results ◽  
Steel Reinforced Concrete ◽  
Beam Design ◽  
Materials Used ◽  
Bamboo Reinforcement

The flexural behavior of concrete beams reinforced with bamboo was studied experimentally. Bamboo was used as the main reinforcement with different bonding materials in place of steel. A nominal mix of M20 grade concrete was adopted for the beam design. The Bamboo surface was treated with common binding materials like Araldite and Bitumen. Araldite and Bitumen are good binding materials used to connect materials like steel, carbon and many different materials. Two specimens were casted with bitumen coating, two specimens were coated with araldite, two specimens were casted without any binder coating and a specimen was casted using normal steel reinforcement. Beams were casted with bamboo reinforcement and cured for 28 days. Deflection and flexural behavior of the beams were monitored. The test results imply that araldite coating in concrete beams with bamboo reinforcement increased the flexural strength to that of bamboo reinforced concrete using bitumen which is lesser strength to that of steel reinforced concrete beam.

Relationship between Half-Cell Potentials and Load Carrying Capacity of Corroded Reinforced Concrete Beam-Column Joints

2013 ◽  
Vol 351-352 ◽  
pp. 939-944
Author(s):  
Ming Li ◽  
De Jian Shen ◽  
Jie Yang ◽  
Zheng Hua Cui
Keyword(s):  
Reinforced Concrete ◽  
Corrosion Rate ◽  
Carrying Capacity ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Rc Beam ◽  
Load Carrying Capacity ◽  
Half Cell ◽  
Load Carrying ◽  
The Relationship

This paper aims at detailed investigation on the relationship between half-cell potentials and load carrying capacity of corroded RC beam-column joints. There are four specimens in the test with the corrosion rate to 0%, 3%, 9% and 15%. Results show that the potentials of normal joint are larger than that of corroded damaged joints. As the corrosion rate of joints increases, load carrying capacity and half-cell potentials decrease. Analytical method based on the values of half-cell potentials to evaluate the load carrying capacity of corroded joint is presented. Comparing the analytical and experimental results, the proposed method can predict the load carrying capacity of corroded reinforced concrete beam-column joints.

Estimation of Ultimate Tendon Stress in Reinforced Concrete Beams Prestressed with External FRP Tendons

2013 ◽  
Vol 798-799 ◽  
pp. 374-377
Author(s):  
Shuan Jiang
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beam ◽  
Concrete Beams ◽  
Plastic Hinge ◽  
Reinforced Concrete Beam ◽  
Reinforced Concrete Beams ◽  
Test Results ◽  
Stress Increment ◽  
Hinge Zone ◽  
Good Agreement

The ultimate tendon stress is the key to calculation of flexural capacity in reinforced concrete beam prestressed with external FRP tendons (RCBPEFT). Based on the theory of equivalent plastic hinge zone, the general formulas for calculating the ultimate tendon stress increment and ultimate tendon stress in RCBPEFT are therefore proposed. Comparisons indicate that the predictions are in good agreement with the test results.

Experimental and Numerical Investigation on Reinforced Concrete Beam-Column Joints

2013 ◽  
Vol 351-352 ◽  
pp. 1450-1453
Author(s):  
Xiao Yong Wu ◽  
Yang Zhou Li
Keyword(s):  
Reinforced Concrete ◽  
Axial Load ◽  
Concrete Beam ◽  
Load Ratio ◽  
Lateral Force ◽  
Reinforced Concrete Beam ◽  
Static Test ◽  
Axial Load Ratio ◽  
Source Program ◽  
The Relationship

The elasto-plastic analysis of reinforced concrete square columns was introduced to study the relationship between lateral force and curvature by using the open source program OpenSees. A pseudo static test on the inverted "T" shape reinforced concrete square column was conducted for the comparative analysis. The results indicated that the lateral force calculated by program agree with experimental data with an axial load ratio of 0.33. The calculated yield lateral force was 29.7 kN, the error was lower than 7% compared with experimental results. In addition, the cross-section curvature were obtained, which were difficult to obtain through the traditional experimental study, the calculated yield curvature was 1.825×10-5. The calculated results with different axial load ratios were presented in this paper, which showed that both the yield lateral force and curvature of reinforced concrete square columns were increased with low axial load ratio, and at the same time it could reduce some experimental work by using computer simulation.

scholarly journals Implementation of Quintuple Helix in the Development and Improvement of SMEs Competitiveness in Banyuwangi Regency

2021 ◽  
Vol 3 (1) ◽  
pp. 232-241
Author(s):  
Herdiana Dyah Susanti ◽  
Dian Arief Pradana
Keyword(s):  
Civil Society ◽  
Experimental Research ◽  
Natural Environment ◽  
Test Results ◽  
Quintuple Helix ◽  
Post Test ◽  
The University ◽  
The Relationship ◽  
University Industry

Innovation is an interactive result that involves various types of actors based on the helix concept where each actor contributes according to its role. University, Industry, Government, Civil Society and media and culture-based society, society and natural environment in the concept of quintuple helix. This study aims to (1) Demonstrate the relationship between quintuple helix in developing SMEs competitiveness, (2) Effectiveness of the application of quintuple helix in developing SMEs competitiveness. This research is almost the same as experimental research with the pre-test - post-test results of the application of quintuple helix at SMEs in Banyuwangi Regency. The results of this study show the role of the University, Industry, Government, Civil Society as well as media and culture-based society, society and the natural environment in the concept of quintuple helix can improve the competitiveness of SMEs, enhance the capabilities of HR, improve the quality, and competitiveness of products produced by SMEs.

Sign in / Sign up

Export Citation Format

Share Document