Study on Damage Characteristics of Reinforced Concrete Structure for Internal Explosion

2013 ◽  
Vol 423-426 ◽  
pp. 1312-1316
Author(s):  
Ya Dong Yang ◽  
Xiang Dong Li ◽  
Xiao Ming Wang
Keyword(s):  
Structural Damage ◽  
Distribution Curve ◽  
Characteristic Parameter ◽  
Reinforced Concrete Structure ◽  
Weight Changes ◽  
Distribution Law ◽  
Structure Damage ◽  
Damage Characteristics ◽  
Rc Structure ◽  
Internal Explosion

In order to reveal the damage characteristics of internal explosion, the internal explosion of closed RC structure under incremental charges manner until structural damage are simulated by LS-DYNA code. The weight changes of charge influence on structure damage and distribution law of characteristic parameter of shockwave on the typical position are also discussed in this paper. The results show that, the distribution of shockwave overpressure on the walls under different weight of charge obey three kinds of linear laws as following: affected by one wall, two walls and three walls, respectively. The distributions of impulse on the walls under different weight of charge obey their distribution curve respectively when the structure is undestroyed, but the impulse will deviate from the distribution curve when the structure is destroyed. And the damage situation of RC structure under internal explosion is graded。

Structure Damage Detection via the Behavior of Substructure

1991 ◽  
Author(s):  
J. H. Wang ◽  
C. S. Liou
Keyword(s):  
Damage Detection ◽  
Mechanical System ◽  
Dynamic Behavior ◽  
Structural Damage ◽  
Structure Damage

Abstract A mechanical system generally consists of many substructures. However, it is impossible to observe the dynamic behavior of any substructure directly when the whole structure is in operation. A method was proposed in this work to determine the FRFs of a substructure by using the measured FRFs of the whole structure and the priorly known FRFs of another substructure With this method, one can detect the structural damage more easily by observing the change of the FRFs of the damaged substructure.

Review on Damage Identification and Diagnosis Research of Civil Engineering Structure

2014 ◽  
Vol 1006-1007 ◽  
pp. 34-37 ◽  
Author(s):  
Hong Ni ◽  
Ming Hui Li ◽  
Xi Zuo
Keyword(s):  
Structural Damage ◽  
Civil Engineering ◽  
Damage Identification ◽  
Engineering Structures ◽  
Engineering Structure ◽  
Civil Engineering Structure ◽  
Structure Damage ◽  
Development Direction ◽  
Structural Damage Identification ◽  
Civil Engineering Structures

This paper first describes the importance of structural damage identification and diagnosis in civil engineering, and introduces domestic and foreign status of damage identification and diagnosis methods, and on the basis of this, it also introduces all kinds of methods for damage identification and diagnosis of civil engineering structures, and finally puts forward the development direction of civil engineering structure damage identification and diagnosis.

Intelligent Systems for Structural Damage Assessment

2018 ◽  
Vol 29 (1) ◽  
pp. 378-392
Author(s):  
Eleni Vrochidou ◽  
Petros-Fotios Alvanitopoulos ◽  
Ioannis Andreadis ◽  
Anaxagoras Elenas
Keyword(s):  
Damage Assessment ◽  
Intelligent Systems ◽  
Structural Damage ◽  
Fuzzy Inference ◽  
Damage Index ◽  
Reinforced Concrete Structure ◽  
Ann Model ◽  
Inference System ◽  
Time Frequency ◽  
Artificial Neural Network Ann

Abstract This research provides a comparative study of intelligent systems in structural damage assessment after the occurrence of an earthquake. Seismic response data of a reinforced concrete structure subjected to 100 different levels of seismic excitation are utilized to study the structural damage pattern described by a well-known damage index, the maximum inter-story drift ratio (MISDR). Through a time-frequency analysis of the accelerograms, a set of seismic features is extracted. The aim of this study is to analyze the performance of three different techniques for the set of the proposed seismic features: an artificial neural network (ANN), a Mamdani-type fuzzy inference system (FIS), and a Sugeno-type FIS. The performance of the models is evaluated in terms of the mean square error (MSE) between the actual calculated and estimated MISDR values derived from the proposed models. All models provide small MSE values. Yet, the ANN model reveals a slightly better performance.

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.

The Feasibility Study of Vibration Transmissibility Applied to Structure Damage Identification

2013 ◽  
Vol 347-350 ◽  
pp. 107-110
Author(s):  
Sen Wu ◽  
Bin Wang ◽  
Hai Hua Zhang
Keyword(s):  
Numerical Simulation ◽  
Cantilever Beam ◽  
Feasibility Study ◽  
Structural Damage ◽  
Simulation Experiment ◽  
Damage Identification ◽  
Structure Damage ◽  
Damage Location ◽  
Identification Method ◽  
Vibration Transmissibility

In view of the defects of the traditional damage identification method based on vibration,the damage identification method based on vibration transmissibility is put forward. The feasibility of the vibration transmissibility applied to structural damage identification is analyzed by the numerical simulation experiment of a cantilever beam, the analysis results show that, vibration transmissibility contains the structure damage severity, damage location and other useful information, and all the information is favor of the damage identification.

Research on Radial Basis Function Network Application in Steel Truss Girder Bridge Damage Identification

2014 ◽  
Vol 536-537 ◽  
pp. 352-355
Author(s):  
Zhong Hui Wang
Keyword(s):  
Structural Damage ◽  
Damage Identification ◽  
Radial Basis Function Network ◽  
New Method ◽  
Structure Damage ◽  
Steel Truss ◽  
Bridge Damage ◽  
Girder Bridge ◽  
Steel Truss Girder ◽  
Better Than

Damage alarm is an important step among structure damage identification. Its objective is to evaluate the structure health. the existing damage alarm methods are mostly based on BPNN without thinking over testing noise. Therefore, a new method based on hybrid algorithm RBFNN is proposed for structure damage alarm system in this paper. The experiment results of steel truss girder bridge show that the new method is better than BPNN for structural damage alarm.

Dynamic Behavior Analysis and its Application in Tower Crane Structure Damage Identification

2011 ◽  
Vol 368-373 ◽  
pp. 2478-2482 ◽  
Author(s):  
Sheng Chun Wang ◽  
Rong Sheng Shen ◽  
Tong Hong Jin ◽  
Shi Jun Song
Keyword(s):  
Dynamic Load ◽  
Structural Damage ◽  
Damage Identification ◽  
Fem Model ◽  
Dynamic Displacement ◽  
Structure Damage ◽  
Tower Crane ◽  
Diagnosis Method ◽  
Damage Condition ◽  
Health Diagnosis

First establish a dynamic model of tower crane in the load lifting process, the lifting load is solved.Then establish the FEM model of the tower crane under the normal and the damage condition. Get the dynamic displacement of the normal and the damage status under the lifting dynamic load. Propose a damaged diagnosis method by the displacement rate. The results of the study show that this method can not only diagnose the structural damage status, but also determine the positions of structural damage. This will be a new search on tower crane structural health diagnosis.

scholarly journals Comparison of Different Solutions for a Seismic and Energy Retrofit of an Auditorium

2021 ◽  
Vol 13 (16) ◽  
pp. 8761
Author(s):  
Alessandra De Angelis ◽  
Francesco Tariello ◽  
Rosa Francesca De Masi ◽  
Maria Rosaria Pecce
Keyword(s):  
Structural Damage ◽  
Integrated Design ◽  
Simulation Models ◽  
Integrated Approach ◽  
Energy Performance ◽  
Economic Losses ◽  
Technical Solution ◽  
Reinforced Concrete Structure ◽  
Energy Retrofit ◽  
The Cost

The increasing attention paid to climate change has boosted scientific research in the matter of energy refurbishment of existing public buildings. However, the design of the intervention must be integrated with structural upgrading when the constructions are located in seismic zones. Indeed, in Italy, as in other seismically active countries, the structural damage, observed after earthquakes, underlines the increase in economic losses for buildings retrofitted only for energy saving. In this framework, the paper introduces an integrated approach for selecting retrofit actions aimed at improving both the seismic and energy performance, starting from a detailed in situ analysis with which dynamic energy and structural simulation models are constructed. The case study is an auditorium erected in 1982 with a reinforced concrete structure inside a masonry ring wall of an ancient building. A step-by-step analysis of each component role in the structural and energy performance of the building is proposed. The results indicate that the proposed approach can help to determine the best technical solution, and the integrated design leads to saving 10% of the cost of the works.

scholarly journals A Comprehensive Analysis of Light Weight Steel Structure and Wind Load

2021 ◽  
pp. 396-403
Author(s):  
Nitin Khare ◽  
Dr. Rajeev Chandak
Keyword(s):  
Structural Damage ◽  
Steel Structure ◽  
Steel Structures ◽  
Light Weight ◽  
Structure Damage ◽  
Cold Formed Steel ◽  
Strong Winds ◽  
And Performance ◽  
Hot Rolled ◽  
Extreme Winds

Review to hot-rolled steel structures, cold-formed steel structures are susceptible to extreme winds because of the light weight of the building and its components. Many modern cold-formed steel structures have sustained significant structural damage ranging from loss of cladding to complete collapse in recent cyclones. This article first provides Review some real damage cases for light steel structures induced by the high winds. After that, the paper reviews research on the damage analysis and evaluation of light steel structures caused by strong winds, which include connection failure, fatigue failure, purlin buckling, and primary frame component instability problems. Moreover, this review will mention some applications of structure damage assessment methods in this area, such as vulnerability analysis and performance-based theory, etc.

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