Prediction and verification of compressive strength of historical masonry structures with artificial neural network

Onat, Onur; Yön, Burak

doi:10.31462/jseam.2019.01194198

Cited by 2 publications

(1 citation statement)

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“…It is also important to check the obtained natural frequency according to some empirical formulations related to the masonry type bridges. The study performed by Onat [24] represents different empirical formulations including some parameters such as unit weight, elasticity modulus of masonry materials, length, height, width and main span length of the masonry bridge. It can be understood that the empirical formulation consisting of both mechanical and physical quantities gives a more reliable result when compared to those with the natural frequencies obtained experimentally.…”

Section: Experimental Modal Identification Of Sarpdere Bridgementioning

confidence: 99%

Response surface-based finite element model calibration of a one-span historical masonry bridge

Alpaslan¹,

Karaca²

2020

JSEAM

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This study aims to investigate the dynamic behavior of a one-span historical masonry arch bridge. For this reason, the masonry bridge with 15.5m in length and 4.75m in width was chosen and the modal parameters were obtained by performing numerical analyses and experimental measurements. Operational Modal Analysis technique is utilized for experimental study to determine modal parameters of the historical masonry bridge. Sensitive three-axial accelerometers were located on critical points on the bridge span and signals originated by accelerometers were collected to quantify the vibratory response of the historical bridge. The Enhanced Frequency Domain Decomposition and Stochastic Subspace Identification method are employed to identify the natural frequencies, mode shapes, and damping ratios experimentally. The 3D finite element modeling of the historical masonry bridge was created and the natural frequencies and mode shapes of the bridge were determined numerically. Experimental results were compared with those of the finite element analysis of the bridge. It can be noticed significant differences when comparing the results of the experimental and numerical with the initial conditions. Therefore, the finite element model is calibrated by using the response surface method according to the experimental results to minimize the uncertain finite element modeling parameters of the historical masonry arc bridge such as material properties and boundary conditions. At the end of the calibration process, the maximum differences between natural frequencies obtained experimental measurements and numerical analysis decreases from 4%-50% to 0.5%-2.5%. The final calibrated finite element model for the masonry bridge is able to produce natural frequencies in close agreement with the measured ones.

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Section: Experimental Modal Identification Of Sarpdere Bridgementioning

confidence: 99%