Study on Damage Identification for Reinforced Concrete Structures Based on Wavelet Transform

2011 ◽  
Vol 94-96 ◽  
pp. 1505-1510 ◽  
Author(s):  
Xiao Yu Miao ◽  
She Liang Wang ◽  
Yu Jiang Fan
Keyword(s):  
Wavelet Transform ◽  
Reinforced Concrete ◽  
Damage Identification ◽  
Concrete Structures ◽  
Spatial Location ◽  
Reinforced Concrete Structures ◽  
Test Model ◽  
Reinforced Concrete Frame ◽  
Concrete Frame ◽  
Reinforced Concrete Frame Structures

Reinforced concrete structures are prone to damage during their service lifetime caused by factors such as the effect of overload, ground motions, and other actions. Undetected damage may lead to structural failures. Early detection of damage and timely repairs can prevent catastrophic failure and ensure regular service of structures. As a result, a so-called delimitation wavelet-transform search method, based on the characteristic of multi-resolution of wavelet transform, is presented in this paper for on-line damage identification of reinforced concrete structures. One possible advantage of this method is that the damage temporal and spatial location can be detected rapidly and efficiently. Further research is carried out with numerical simulation of a structure test model to study the storied damage detection and localization of reinforced concrete frame structures under seismic actions. The analyzing result is compared with that observed in a simulated earthquake vibration stand test. Good agreement is obtained and it verifies the effectiveness and validity of the method proposed in this paper.

scholarly journals Influence of effective width of flange on calculation and reinforcement dimensioning of beam of reinforced concrete frame

2021 ◽  
Vol 20 (2) ◽  
pp. 041-056
Author(s):  
Maciej Tomasz Solarczyk
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structures ◽  
Reinforced Concrete Structures ◽  
Reinforced Concrete Frame ◽  
Cross Sectional ◽  
Concrete Frame ◽  
Definition Of ◽  
Effective Flange Width ◽  
The Impact ◽  
T Beam

The article analyses the impact of modeling the cross-section of two-nave and two-storey reinforced concrete frame with dimensions: 18.0 m × 32.0 m as a bars on the results of bending moments, the value of elastic deflection and dimensioning of reinforcement due to bending. Six options were considered: a beam as a rectangular section and five T-beam variants with different definition of effective flange width. The differences in obtained results were commented. Conclusions useful for the designing of reinforced concrete structures were presented. The procedure for determining the effective flange width in the context of PN-EN 1992-1-1:2008 and PN-B 03264:2002 standards with a commentary on the use of effective flange width in calculations and construction of reinforcement in reinforced concrete structures were described. Brief description of determining the reinforcement due to bending according to simplified method given in PN-EN 1992-1-1:2008 was presented. In addition, the standard formula for determining the minimum cross sectional area of reinforcement (9.1N) in PN-EN 1992-1-1:2008 with a proposal for its strict determination for the T-beam with a flange in the tensile zone was analyzed.

Numerical and Experimental Analysis of the Nonlinear Response of Reinforced Concrete Frame Structure from Seismic Effects

2017 ◽  
Vol 738 ◽  
pp. 205-214
Author(s):  
Ivana Veghova
Keyword(s):  
Reinforced Concrete ◽  
Material Properties ◽  
Concrete Structures ◽  
Reinforced Concrete Structures ◽  
Reinforced Concrete Frame ◽  
Capacity Spectrum Method ◽  
Standard Material ◽  
Concrete Frame ◽  
Spectrum Method ◽  
Capacity Spectrum

Using capacity spectrum method was analyzed frame reinforced concrete structures. Capacity spectrum method has been used to analyse frame reinforced concrete structures. Geometry, material properties and reinforced cross sections were designed by experimental tested model of reinforced concrete frame joints in the scale of 1:1. The results were compared with the results of the analysis of the structure of the same geometrical characteristics but of standard material properties of concrete and steel.

scholarly journals Selected Aspects of Computer Modeling of Reinforced Concrete Structures

2016 ◽  
Vol 62 (1) ◽  
pp. 51-64 ◽  
Author(s):  
M. Szczecina ◽  
A. Winnicki
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structures ◽  
Bending Moment ◽  
Material Model ◽  
Reinforced Concrete Structures ◽  
Reinforced Concrete Frame ◽  
Material Constants ◽  
Applied Model ◽  
Concrete Frame ◽  
Angle Fracture

Abstract The paper presents some important aspects concerning material constants of concrete and stages of modeling of reinforced concrete structures. The problems taken into account are: a choice of proper material model for concrete, establishing of compressive and tensile behavior of concrete and establishing the values of dilation angle, fracture energy and relaxation time for concrete. Proper values of material constants are fixed in simple compression and tension tests. The effectiveness and correctness of applied model is checked on the example of reinforced concrete frame corners under opening bending moment. Calculations are performed in Abaqus software using Concrete Damaged Plasticity model of concrete.

Deformation Characteristics of Reinforced Concrete Beam-Column Joint Cores under Earthquake Loading

2003 ◽  
Vol 6 (1) ◽  
pp. 15-21 ◽  
Author(s):  
Sayed A. Attaalla ◽  
Mehran Agbabian
Keyword(s):  
Reinforced Concrete ◽  
Shear Deformation ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Reinforced Concrete Frame ◽  
Bond Failure ◽  
Strain Compatibility ◽  
Concrete Frame ◽  
Column Joint ◽  
Reinforced Concrete Frame Structures

The characteristics of the shear deformation inside the beam-column joint core of reinforced concrete frame structures subjected to seismic loading are discussed in this paper. The paper presents the formulation of an analytical model based on experimental observations. The model is intended to predict the expansions of beam-column joint core in the horizontal and vertical directions. The model describes the strain compatibility inside the joint in an average sense. Its predictions are verified utilizing experimental measurements obtained from tests conducted on beam-column connections. The model is found to adequately predict the components of shear deformation in the joint core and satisfactorily estimates the average strains in the joint hoops up to bond failure. The model may be considered as a simple, yet, important step towards analytical understanding of the sophisticated shear mechanism inside the joint and may be implemented in a controlled-deformation design technique of the joint.

Seismic Performance Evaluation for Steel Reinforced Concrete Frame Structures

2011 ◽  
Vol 255-260 ◽  
pp. 2421-2425
Author(s):  
Qiu Wei Wang ◽  
Qing Xuan Shi ◽  
Liu Jiu Tang
Keyword(s):  
Reinforced Concrete ◽  
Seismic Performance ◽  
Frame Structure ◽  
Reinforced Concrete Frame ◽  
Seismic Performance Evaluation ◽  
Steel Reinforced Concrete ◽  
Concrete Frame ◽  
Structural Capacity ◽  
Reinforced Concrete Frame Structures ◽  
Dynamic Nonlinear Analysis

The randomness and uncertainty of seismic demand and structural capacity are considered in demand-capacity factor method (DCFM) which could give confidence level of different performance objectives. Evaluation steps of investigating seismic performance of steel reinforced concrete structures with DCFM are put forward, and factors in calculation formula are modified based on stress characteristics of SRC structures. A regular steel reinforced concrete frame structure is analyzed and the reliability level satisfying four seismic fortification targets are calculated. The evaluation results of static and dynamic nonlinear analysis are compared which indicates that the SRC frame has better seismic performance and incremental dynamic analysis could reflect more dynamic characteristics of structures than pushover method.

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