Dynamic assessment of partially damaged historic masonry bridges under blast-induced ground motion using multi-point shock spectrum method

Hacıefendioğlu, Kemal; Koç, Varol

doi:10.1016/j.apm.2016.06.049

Cited by 19 publications

(2 citation statements)

References 25 publications

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“…These developments motivated the researchers to obtain the blast responses of structures using finite element (FE) analysis based numerical methods. In the literature, effects of blasting on the structural behavior were handled for buildings [11][12][13][14][15][16][17][18], bridges [19][20][21][22][23], art structures [1,24], and historical structures [25]. It can be seen in the literature review that many studies have been performed to investigate blasting responses of various structures by using finite element models.…”

Section: Introductionmentioning

confidence: 99%

Experimental, numerical and analytical investigation on blast response of brick walls subjected to TNT explosive

Altunışık¹,

Önalan²,

Sunca³

2021

JSEAM

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Structural damage caused by terrorist attacks or explosions resulting from accidents is an essential crucial issue for civil engineering structures. After the explosion, heavy damage and total collapse occur in the structural carrier system, and these destructions can cause significant loss of life and property. This study aimed to determine the structural behavior of brick walls exposed to blast loading with different explosive weights using analytical, numerical, and experimental methods. The masonry brick walls were selected for the application and constructed in the allowed quarry area for experimental studies. 40g, 150g, and 290g of TNT, which are placed inner base center of brick walls, were used respectively to observe the progressive damage. The analytical blast responses, such as maximum pressure values etc., were calculated and predicted empirical formulas. The numerical blast responses were determined with Ansys Workbench and Autodyn software. At the end of the study, damage situations, pressures, displacement values, and energies are presented comparatively. It is observed from both experimental and numerical methods that 40g and 150g TNT explosives caused several damages on the wall. The wall collapsed on supporting points in 290g TNT explosives. It can be seen that the mean values of pressures and displacements increase respectively by three and six times, with the TNT explosive weight increasing from 40g to 290g. A good agreement is also found between the finite element results and empirical formulas proposed by Henrych and Sadovsky. However, inconsistent blasting responses are obtained with empirical formulas depending on the scaled distance.

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Section: Introductionmentioning

confidence: 99%

Experimental, numerical and analytical investigation on blast response of brick walls subjected to TNT explosive

Altunışık¹,

Önalan²,

Sunca³

2021

JSEAM

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“…Wang et al [10] conducted pyroshock response analysis of separation nuts in the aerospace launch system based on the finite element (FE) model and SRS. Haciefendioglu et al [11] conducted the dynamic assessment of partially damaged historic masonry bridges under blast-induced ground motion using the multipoint SRS method and FE model. Stewart et al [12] analyzed the response of the hydraulic blast simulator used for generating high-g shock based on the SRS method.…”

Section: Introductionmentioning

confidence: 99%

Intelligent Time‐Domain Parameters Matching for Shock Response Spectrum and Its Experimental Validation in Active Vibration Control Systems

Liu

Yang

Zhang

et al. 2019

Shock and Vibration

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Shock response spectrum (SRS) test is a kind of vibration test that uses the principle of equivalent damage to simulate complex shock and vibration environment for evaluating product fragility. However, for a certain SRS, neither an analytical nor a unique inverse time-domain shock waveform (TSW) exists, making the SRS test a very challenging problem. Synthesis of a TSW using a group of wavelets with different frequencies, amplitudes, and phases is considered to be a very promising method. However, it is challenging to find an optimal group of wavelets since there are hundreds of optimization variables and objective functions. In this paper, a novel intelligent parameter matching method for TSW synthesis is proposed for the SRS test. A variable-weight method has been introduced to combine the effects of hundreds objective functions so that the optimization problem can be solved by using the genetic algorithm. The frequency response function of the shaking system has been taken into consideration in the calculation of the objective function, so the synthesized TSW can be applied directly to the SRS test. In the optimization process, normalized control factors have been formulated for the optimization variables so that they can be tuned in a reasonable small range to avoid irrationality and accelerating convergence in searching process. The effectiveness of the proposed method has been verified experimentally in two active vibration control systems, in which one contains a 500 N minishaker and the other contains a 1-ton shaking table. It can be seen from the experimental results that the proposed method can accurately synthesize the input TSW for the shaking system, where the output TSW and SRS can accurately meet the time- and frequency-domain specification.

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Rating and reliability assessment of a historical masonry arch bridge

Alpaslan

Yilmaz

Şengönül

2023

J Civil Struct Health Monit

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Dynamic assessment of partially damaged historic masonry bridges under blast-induced ground motion using multi-point shock spectrum method

Cited by 19 publications

References 25 publications

Experimental, numerical and analytical investigation on blast response of brick walls subjected to TNT explosive

Experimental, numerical and analytical investigation on blast response of brick walls subjected to TNT explosive

Intelligent Time‐Domain Parameters Matching for Shock Response Spectrum and Its Experimental Validation in Active Vibration Control Systems

Rating and reliability assessment of a historical masonry arch bridge

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