Analysis on Factors that Affect the Damping of Reinforced Concrete Beam under Hammering Method

2011 ◽  
Vol 374-377 ◽  
pp. 2130-2133
Author(s):  
Da Peng Gu ◽  
Wei Ming Yan ◽  
Yan Jiang Chen ◽  
Hai Xia Zhou
Keyword(s):  
Reinforced Concrete ◽  
Parameter Identification ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Rational Method ◽  
Beam Model ◽  
Dynamic Experiment ◽  
Simply Supported Beam ◽  
Dynamic Behaviors ◽  
Simply Supported

Abstract. Damping, as one of the most important indicators of the structure’s dynamic behaviors, depicts how energy dissipates during vibration. Using Hammering Method on Reinforced Concrete Simply Supported Beam model dynamic experiment, by analyzing the vibrating signals captured during hammering process, how the allocation of the sensors and the hammer strength affect the parameter identification can be revealed. A rational method of parameter identification can be presented as well.

Numerical Study of Damage Model for Reinforced Concrete Beam under Complex Boundary Condition Subjected to Air Blast Load

2014 ◽  
Vol 578-579 ◽  
pp. 757-761
Author(s):  
Dan Li ◽  
Jiang Tao Li ◽  
Jun Lin Tao
Keyword(s):  
Reinforced Concrete ◽  
Dynamic Response ◽  
Concrete Beam ◽  
Blast Loading ◽  
Reinforced Concrete Beam ◽  
Rc Beam ◽  
Simply Supported Beam ◽  
Simply Supported ◽  
Damage Morphology ◽  
Complex Boundary

Explicit FEM model ANSYS-DYNA is applied to simulate dynamic response and damage morphology of RC beam under blast loading. The dynamic response and damage morphology of reinforced concrete beam is analyzed under the different burst points, different explosive locations with the same proportion distance. The results show that: Under the same blast loading, the extent of damage of RC beam under complex boundary was lighter than the simply supported beam because of the stiffness contribution of slab and column. Acceleration at the half span point of the beam was 1/3 of simply supported beam, and the explosion shock attenuation was obvious.

The Anti-Bending Bearing Capacity Analysis of the Reinforced RC Girder with External Prestress Base on ABAQUS

2011 ◽  
Vol 378-379 ◽  
pp. 374-378 ◽  
Author(s):  
Yu Xu Zhang
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Maximum Intensity ◽  
Capacity Analysis ◽  
Simply Supported ◽  
Finite Element Software ◽  
Steel Bar

The reinforced RC girder with external prestress is applied more and more widely. Reinforcement of the girder is influenced by various factors, among which the concrete intensity degree and the prestress degree are mainly analyzed through the finite element software ABAQUS to learn their influence on the anti-bending bearing capacity of the externally reinforced RC simply supported beam. Since the reinforcement stresses of RC girder (regular reinforced concrete beam) are far less than the maximum intensity of the reinforcing steel bar, the concrete in the pulled area cracks, which causes the stiffness of constructional elements to decrease, deform and expand so that the elements become useless before it is damaged. External prestress can effectively improve such defect of the RC girder, and a great deal of research has been carried out. Due to the experimental boundedness and discreteness, large general finite element software ABAQUS is adopted to analyze the anti-bending bearing capacity of the externally reinforced RC girder, which is based on the size of experimental constructional elements in literature.

Use Performance Analysis on the Reinforced Concrete Simply Supported Beam in-Service by CFRP Reinforcing

2011 ◽  
Vol 368-373 ◽  
pp. 2016-2021
Author(s):  
Yong Chao Zhou ◽  
Liang Liang Li ◽  
Tie Jun Sun
Keyword(s):  
Reinforced Concrete ◽  
Cross Section ◽  
Carrying Capacity ◽  
Concrete Beam ◽  
Load Test ◽  
Simply Supported Beam ◽  
Simply Supported ◽  
Secondary Load ◽  
Before And After ◽  
Comparison And Analysis

Based on a secondary load, the formula of calculating the cross-section stress and stiffness of the reinforced concrete simply supported beam by CFRP reinforcing in normal use is derived. Through the comparison and analysis of the load test data before and after the concrete simply supported beam in-service is reinforced, it is showed that CFRP can be coordinated with the concrete in normal use so that the carrying capacity of concrete beam is increased by about 17% to 19%, the stiffness is increased by about 50%, and it is consistent with the formula calculated results.

scholarly journals Identification of Crack in Reinforced Concrete Beam Subjected to Static Load Using Non-linear Finite Element Analysis

2019 ◽  
Vol 5 (7) ◽  
pp. 1631-1646
Author(s):  
Abdulsamee M. Halahla
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Reinforced Concrete ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Computer Hardware ◽  
Beam Model ◽  
Element Analysis ◽  
Non Linear ◽  
Concrete Elements

Experimental testing was used widely as a means to investigate the behavior of these individual elements and the effects of concrete strength under different loading types. While this method represents real life responses, it is very time consuming and the use of materials can be quite costly. Recently, the use of finite element analysis (FEA) has increased due to advances in knowledge and the capabilities of computer hardware and software. The utilization of computer software to model the structural elements has become much faster and extremely cost-effective. The finite element software ANSYS 11.0 is used for modeling and analysis by conducting non-linear static analysis. This research work used nonlinear finite element analysis for a reinforced concrete beam in order to show the potential of the FEA for studying the behavior of reinforced concrete elements, and to understand their load-deflection response along with the crack evolution. For concrete a solid 65 element was used, while for the reinforcement steel bar link 8 elements were used. For the material constitutive model linear and multi-linear behavior for concrete were considered, while linear and bilinear behavior were considered for the reinforcement bar.  A reinforced concrete beam model is studied and compared with experimental data from the literature. The characteristic points on the load-deflection response curve predicted using finite element analysis, were compared to the theoretical limit (hand-calculated) results. Conclusions were then drawn as to the accuracy of using finite element modeling for the analysis of reinforced concrete elements. The results showed a good match to experimental and hand calculations.

scholarly journals Fire Analysis of Simply Supported Reinforced Concrete Beam

2021 ◽  
Vol 1197 (1) ◽  
pp. 012079
Author(s):  
Virendra Hatwar ◽  
Kuldeep Dabhekar ◽  
B.k. Singh ◽  
shrikant solanki
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beam ◽  
Behavior Pattern ◽  
Reinforced Concrete Beam ◽  
Reinforced Concrete Structure ◽  
Fire Hazards ◽  
Simply Supported ◽  
Finite Element Software ◽  
Standard Fire ◽  
Calculation Methodology

Abstract This paper presents analysis of simply supported reinforced concrete beam exposed to standard fire. Eurocode standard provides recommendations for analysis of reinforced concrete structure under fire. The thermal and structural responses of structure are calculated using commercially available software ANSYS. An advance calculation methodology must be implemented to estimate the behavior of structure and to understand thermal and mechanical properties of material during fire. These include transient thermal as well as structural analysis of structure. Finite element software ANSYS is capable to conducting thermal analysis as per defined material properties. It is important to study effect at elevated temperature on structure to understanding the behavior pattern and decrease the losses caused fire hazards.

scholarly journals Non-Linear Finite Element Analysis of Flexural Reinforced Concrete Beam using Embedded Reinforcement Modeling

2020 ◽  
Vol 6 (3) ◽  
pp. 271
Author(s):  
Mahmud Kori Effendi
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Compressive Strength ◽  
Reinforced Concrete ◽  
Concrete Beam ◽  
Building Materials ◽  
Reinforced Concrete Beam ◽  
Flexural Behavior ◽  
Beam Model ◽  
Element Analysis

Reinforced concrete is one of the most widely used building materials in Indonesia due to its workability, easiness, and reasonable price. Meanwhile, it is very important to understand the response of these elements during the loading process to ensure the development of an effective structure and one of the most effective numerical methods for reinforced concrete elements is the Finite Element Analysis (FEA). This study was, therefore, conducted to investigate the flexural behavior of reinforced concrete beam using a nonlinear finite element analysis through the application of the MSC MARC/MENTAT software program. This involved the use of a solid element to represent concrete while the truss bar was applied for reinforcing steel after which multi-linear and bilinear models were considered for the two elements respectively while embedded reinforcement model was applied to model the rebar. Moreover, the beam model was also studied and compared with experimental data from previous literature. The result showed the load-deflection to have significantly increased due to an increment in the steel reinforcement yield strength. The same was also observed for the concrete compressive strength while a decrease was recorded in deflection due to the reduction in the compressive strength because the strain was reaching the crushing value. Furthermore, the concrete tension model was found to be the same with the experimental results with the tensile strength observed to have lost its strength after reaching the tensile stress while the contact behavior of the modeled reinforced concrete beam showed the existence of a slip at the support and loading points.

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