Comparison between Experiments and FEM Simulations of the Reinforced Concrete Structure under Shake Table Test

2013 ◽  
Vol 842 ◽  
pp. 477-481
Author(s):  
Ren Zuo Wang ◽  
Wen Yu Chang ◽  
Bing Chang Lin ◽  
Chao Hsun Huang
Keyword(s):  
Reinforced Concrete ◽  
Structural Model ◽  
Plastic Hinge ◽  
Structural Models ◽  
Shake Table ◽  
Reinforced Concrete Structure ◽  
Simulation Procedure ◽  
Nonlinear Responses ◽  
Rc Structure ◽  
Hinge Model

In this paper, the numerical simulation procedure of the reinforced concrete (RC) structure is purposed using SAP2000 software. The plastic hinge model (PHM) is using SWPH code. This PHM is to simulate the nonlinear responses of the RC structure under seismic. The numerical structural models are established using FEM models. The test specimen under shake table is two-span RC structure. In order to demonstrate the accuracy of RC structural model, comparisons between the experimental and numerical results are close. The proposed procedure can be used to simulate the nonlinear responses of RC structure under seismic.

scholarly journals The Effect of Horizontal Vulnerability on the Stiffness Level of Reinforced Concrete Structure on High-Rise Buildings

2020 ◽  
Vol 6 (1) ◽  
pp. 49
Author(s):  
Fanny Monika ◽  
Berkat Cipta Zega ◽  
Hakas Prayuda ◽  
Martyana Dwi Cahyati ◽  
Yanuar Ade Putra
Keyword(s):  
Reinforced Concrete ◽  
Structural Model ◽  
Structural Models ◽  
Time History ◽  
Building Construction ◽  
Reinforced Concrete Structure ◽  
Religious Activities ◽  
Maximum Displacement ◽  
Building Model ◽  
High Rise

Buildings have an essential function; they are a place for people to carry out various activities, such as social, economic, and religious activities. In a building construction plan, considering multiple factors from strength to architecture is necessary. The issue of limited land in some areas has resulted in the construction of vertical buildings, often known as high-rise buildings. High-rise building construction requires paying attention to various levels of vulnerabilities, especially for projects in earthquake-prone areas. In this study, the levels of vulnerability and vertical irregularity of high-rise buildings were analyzed based on structural rigidity for reinforced concrete structures. Building models including a cube-shaped model, L-shaped model, and U-shaped model were investigated. The STERA 3D program was used to determine the strength values of the structures by providing earthquake loads on each structure model using the time-history analysis method. The El Centro and Kobe earthquakes were tested in these structural models because the earthquakes are known to contribute the most exceptional damage value in the history of earthquake-caused disasters. The assessed parameters of the tested structural models include structural stiffness, the most significant displacement in the structure, the maximum displacement and load relations experienced by the construction, and the hysteretic energy exhibited by the structure. Therefore, the best performed structural model in resisting the load could be obtained. The results showed that the U-shaped building model had the highest stiffness value with an increase in stiffness of 7.43% compared with the cube-shaped building model and 3.01% compared with the L-shaped building model.

scholarly journals A Nonlinear Static Research on A G+5 Storey Existing RC Structure Under Seismic Loading

2019 ◽  
Vol 8 (2S3) ◽  
pp. 1078-1082
Keyword(s):  
Seismic Hazard ◽  
Plastic Hinge ◽  
Pushover Analysis ◽  
Strain Curve ◽  
Reinforced Concrete Structure ◽  
Structural Evaluation ◽  
Rc Structure ◽  
Pushover Curve ◽  
Nonlinear Static ◽  
Legal Guidelines

A six-story reinforced concrete structure area to a seismic hazard can be analyzed; as soon as the member has yielded, the plastic hinge will likely be used to symbolize the mode of failure in the beams and columns. The pushover analysis is carried out on constructing utilizing an identical static process from ETABS-2016 and IS 1893-2016. The analysis is regulated through efficiency-situated warmness engineering legal guidelines, even as an inelastic structural evaluation is combined with seismic hazard to calculate the expected seismic performance of the structure. The building's basis shear v / s roof strain curve referred to as the pushover curve is an enormous consequence of pushover evaluation; nonlinear dynamic evaluation is carried out in both respects (X & Y). Default hinge facets to be had in precise packages are built-in for every member in step with FEMA-440(Federal Emergency management agency) and ATC-40(applied technology Council) for every member.

scholarly journals Simplified Plastic Hinge Model for Reinforced Concrete Beam–Column Joints with Eccentric Beams

2021 ◽  
Vol 11 (3) ◽  
pp. 1303
Author(s):  
Hyeon-Jong Hwang ◽  
Chang-Soo Kim
Keyword(s):  
Reinforced Concrete ◽  
Plastic Hinge ◽  
Eurocode 8 ◽  
Design Codes ◽  
Inelastic Behavior ◽  
Moment Frames ◽  
Loading Test ◽  
Current Design ◽  
Joint Width ◽  
Hinge Model

In nonlinear analysis for performance-based design of reinforced concrete moment frames, a plastic hinge spring element is predominantly used in order to simply and accurately describe the inelastic behavior of beam–column joints, including strength degradation. Although current design codes and guidelines provide various beam–column joint models, the focus is on concentric beam–column joints. Therefore, more studies are required for eccentric beam–column joints, which are also common in practice. In the present study, to consider the effect of beam eccentricity on the behavior of beam–column joints, a simplified plastic hinge model was proposed using the effective joint width of current design codes. The proposed model was compared to the cyclic loading test results of beam–column joints with/without beam eccentricity. The comparison showed that the simplified plastic hinge model with the effective joint width of NZS 3101-2006 or Eurocode 8 is considered acceptable for design purpose.

Investigation of the Influence of Cracks on Vibration Processes in a Reinforced Concrete Structure

2018 ◽  
Vol 938 ◽  
pp. 132-138
Author(s):  
Igor N. Shardakov ◽  
A. Shestakov ◽  
R.V. Tsvetkov ◽  
V. Yepin ◽  
I. Glot
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structure ◽  
Numerical Experiments ◽  
Crack Nucleation ◽  
Numerical Data ◽  
Diagnostic Parameter ◽  
Reinforced Concrete Structure ◽  
Rc Structure ◽  
Proposed Model ◽  
The Mathematical Model

The validity of the mathematical model describing the propagation of vibrations in a reinforced concrete (RC) structure was verified by comparing the experimental and numerical data. The proposed model allowed one to perform numerical experiments aimed at comparing vibrorecords obtained from the structure without defects and the structure with cracks. A numerical experiment was performed aimed to explore the changes in vibrorecords when cracks appear in the structure. Based on the results these experiments, an informative diagnostic parameter controlling crack nucleation and propagation in the reinforced concrete structure was derived.

scholarly journals Bending Load-Carrying Capacity of Reinforced Concrete Beams Subjected to Premature Failure

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3085 ◽  
Author(s):  
Paolo Foraboschi
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beams ◽  
Wide Spectrum ◽  
Plastic Hinge ◽  
Reinforced Concrete Beams ◽  
Load Carrying Capacity ◽  
Premature Failure ◽  
Bending Load ◽  
Load Carrying ◽  
Hinge Model

This paper investigates the ultimate flexural strength of reinforced concrete beams when affected by premature failure due to a rotational capacity of the first plastic hinge being consumed before the last plastic hinges reach their maximum possible moment. The paper provides a simple formula for predicting the ultimate load of a hyperstatically supported beam, taking into account the available ductility. The proposed formula is the result of calibration against the ultimate loads from a non-linear analysis on a variety of beams, with a wide spectrum of configurations and with concrete grades from 10.0 to 60.0 N/mm2. The formula in based on the plastic hinge model, making it easy to apply, and the ultimate bending moments allow for the actual rotational capacity, making predictions accurate.

Prediction of average debris launch velocity from a reinforced concrete structure based on SDOF system

2020 ◽  
pp. 136943322096027
Author(s):  
Seung-Hun Sung ◽  
Hun Ji ◽  
Surin Kim ◽  
Jinwung Chong
Keyword(s):  
Reinforced Concrete ◽  
Comparative Study ◽  
Conservation Equation ◽  
Reinforced Concrete Structure ◽  
Reinforcing Bars ◽  
Sdof System ◽  
Energy Conservation Equation ◽  
Rc Structure ◽  
Proposed Model ◽  
Velocity Prediction

This study presents a physics-based model for debris launch velocity prediction of a reinforced concrete (RC) structure subjected to a blast load. The model is basically derived from energy conservation equation. Especially, a resistance-deflection relationship for the structural single degree of freedom (SDOF) system is newly considered to evaluate the energy consumed by the damage and fragmentation of the RC structure. By applying the resistance-deflection relationship, the proposed model can consider the interactions between reinforcing bars and concrete. Moreover, since the resistance-deflection curve is evaluated considering various structural properties as well as boundary conditions, the proposed model can be flexibly utilized compared to conventional approaches. In order to confirm the performance of the proposed model, a comparative study was carried out against benchmark experiments on closed concrete box structures under an internal blast. From the comparative study, it was shown that the debris launch velocities estimated from the proposed model had a good agreement with the test results compared with the other models.

Analyses of High Grade Strength Steel Bars in the Design of a Five-Storey Reinforced Concrete Structure with Comparison of Energy Consumption and CO2 Emission

2012 ◽  
Vol 511 ◽  
pp. 64-69
Author(s):  
Pei Zhang ◽  
Han Zhu ◽  
Apostolos Fafitis
Keyword(s):  
Energy Consumption ◽  
Reinforced Concrete ◽  
Structural Design ◽  
Energy Cost ◽  
High Energy ◽  
Maximum Energy ◽  
Reinforced Concrete Structure ◽  
Design Code ◽  
Rc Structure ◽  
Steel Bars

Energy consumption and CO2 emissions in buildings is becoming an increasingly important issue. Steel is a major building material with high energy cost. In a reinforced concrete (RC) structure, it accounts for the maximum energy consumption. There is a need to quantify the steel amount in RC for various situations so that reduction or optimization in steel usage can be analyzed. In this paper two different calculations (Calculation-I and Calculation-II) are conducted by using two groups of steel in designing beams, columns and plates for a 20000 m2 five-storeyed frame RC structure. In Calculation-I, or Cal-I in abbreviation, the steel used for beams, columns and plates is HRB335, HRB400 and HPB235 respectively. In Calculation-II, or Cal-II in abbreviation, the steel used for beams, columns and plates is HRB400, HRB500 and CRB550 respectively. The strength of steel used in Cal-II is higher than that in Cal-I. The calculation is carried out by following the standardized concrete structural design code, and the steps involved in calculation are given in certain details as seen necessary. The corresponding energy for producing the steel used in beams, columns and plates is also computed and normalized on per square meter basis. The results show that Cal-II saves 101.76 tons of steel than Cal-I, or 5.09kg/m2, which means a saving of about 64.11 t of standard coal or 1.6×102 t CO2 for the whole structure, or 3.2 kg of standard coal or 7.98kg CO2 for per square meter.

scholarly journals Shake table tests of an industrial building

1987 ◽  
Vol 20 (1) ◽  
pp. 53-62
Author(s):  
Koichi Takanashi ◽  
Kenichi Ohi ◽  
Yoshiro Sakai
Keyword(s):  
Plastic Hinge ◽  
Industrial Building ◽  
Response Analysis ◽  
Shake Table ◽  
Test Results ◽  
Shake Table Tests ◽  
Equivalent Static Load ◽  
Inelastic Responses ◽  
Load Effects ◽  
Hinge Model

Shake table tests are conducted on a scaled frame model
of an industrial building, which has irregular story heights, different beam span lengths, and uneven weight distribution. Its elastic and inelastic responses are observed under simulated earthquakes. The test results are used to verify the validity of a computer response analysis, which is based on
the plastic hinge model of flexural members and a hysteresis
rule for brace members. Additionally, the load effects derived from the test results are discussed comparing with the equivalent static load method in the design practice.

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