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Author

Semih Gonen

Other affiliations: Metropolitan University
Bio: Semih Gonen is an academic researcher from Boğaziçi University. The author has contributed to research in topics: Masonry & Structural engineering. The author has an hindex of 5, co-authored 14 publications receiving 56 citations. Previous affiliations of Semih Gonen include Metropolitan University.

Papers
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Journal ArticleDOI
TL;DR: In this article, the authors presented a seismic assessment of a stone masonry arch bridge using different methodologies by investigating the seismic behavior of masonry arches and the uncertainties in the assessment methods presented.

43 citations

Journal ArticleDOI
20 Feb 2021
TL;DR: In this article, a model of a stone masonry Roman aqueduct (the Valens Aqueduct), constructed in the fourth century A.D. in Istanbul, Turkey, to explore the seismic capacity and behavior using the discrete element method (DEM).
Abstract: The majority of architectural heritage consists of load-bearing masonry components made up of stone units and relatively weak mortar joints, yielding potential weak planes for masonry structures where tension and shear failures are expected to occur. Advanced nonlinear analyses are required to simulate these phenomena and predict the corresponding nonlinear structural behavior of historic masonry constructions. In this context, this paper presents a model of a stone masonry Roman aqueduct (the Valens Aqueduct), constructed in the fourth century A.D. in Istanbul, Turkey, to explore the seismic capacity and behavior using the discrete element method (DEM). The employed modeling approach comprises distinct rigid blocks interacting along their boundaries based on the point-contact hypothesis. Thus, the discontinuous stone skeleton of the masonry aqueduct is represented explicitly in the computational model. First, a validation study was conducted on the laboratory experiment to demonstrate the capabilities of the adopted modeling approach. Then, a discontinuum model representing the Valens Aqueduct was used to assess the seismic capacity of the structure under gradually increasing lateral forces. The numerical simulations gave insight into the structural response of the aqueduct from the elastic range to total collapse. Additionally, parametric research was performed considering joint properties, namely the joint tensile strength, contact stiffness, joint friction angle, and compressive strength of the masonry, to quantify the effects of contact parameters on the displacement response of the DEM model. Further inferences were made regarding the modeling parameters, and practical conclusions were derived.

30 citations

Journal ArticleDOI
TL;DR: In this paper, the elasticity modulus of the wall of a stone masonry wall was investigated using several experiments, numerical modeling, and empirical equations. And the authors highlighted the sources of uncertainties in these methods.

20 citations

Journal ArticleDOI
TL;DR: In this paper, discontinuum-based computational models are used to simulate the composite and low-bond strength characteristics of masonry walls, and the same models are then used to determine the influence of uncertainties in the material properties on the macro behavior of the URM walls.

18 citations

Journal ArticleDOI
TL;DR: In this article, the authors contribute to the seismic performance assessment of a historic brick masonry building by finding a strength reduction coefficient through the use of linear and nonlinear coefficients.
Abstract: This article aims at contributing to the seismic performance assessment of a historic brick masonry building by finding a strength reduction coefficient through the use of linear and nonlin...

17 citations


Cited by
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Journal ArticleDOI
TL;DR: In this article, the authors presented a seismic assessment of a stone masonry arch bridge using different methodologies by investigating the seismic behavior of masonry arches and the uncertainties in the assessment methods presented.

43 citations

Journal ArticleDOI
20 Feb 2021
TL;DR: In this article, a model of a stone masonry Roman aqueduct (the Valens Aqueduct), constructed in the fourth century A.D. in Istanbul, Turkey, to explore the seismic capacity and behavior using the discrete element method (DEM).
Abstract: The majority of architectural heritage consists of load-bearing masonry components made up of stone units and relatively weak mortar joints, yielding potential weak planes for masonry structures where tension and shear failures are expected to occur. Advanced nonlinear analyses are required to simulate these phenomena and predict the corresponding nonlinear structural behavior of historic masonry constructions. In this context, this paper presents a model of a stone masonry Roman aqueduct (the Valens Aqueduct), constructed in the fourth century A.D. in Istanbul, Turkey, to explore the seismic capacity and behavior using the discrete element method (DEM). The employed modeling approach comprises distinct rigid blocks interacting along their boundaries based on the point-contact hypothesis. Thus, the discontinuous stone skeleton of the masonry aqueduct is represented explicitly in the computational model. First, a validation study was conducted on the laboratory experiment to demonstrate the capabilities of the adopted modeling approach. Then, a discontinuum model representing the Valens Aqueduct was used to assess the seismic capacity of the structure under gradually increasing lateral forces. The numerical simulations gave insight into the structural response of the aqueduct from the elastic range to total collapse. Additionally, parametric research was performed considering joint properties, namely the joint tensile strength, contact stiffness, joint friction angle, and compressive strength of the masonry, to quantify the effects of contact parameters on the displacement response of the DEM model. Further inferences were made regarding the modeling parameters, and practical conclusions were derived.

30 citations

Journal ArticleDOI
TL;DR: The Fast Relaxed Vector Fitting (FRVF) approach is proposed as a rapid, efficient, and reliable instrument for the vibration-based SI of historical masonry structures and infrastructures and can be utilised for damage assessment.

23 citations

Journal ArticleDOI
TL;DR: In this paper , a two-step strategy for the mechanical analysis of unreinforced masonry (URM) structures, subjected to either in- or out-of-plane loading, is presented.
Abstract: A two-step strategy for the mechanical analysis of unreinforced masonry (URM) structures, subjected to either in- or out-of-plane loading, is presented. At a first step, a semi-automatic digital tool allows the parametric modeling of the structure that, together with an upper bound limit analysis tool and a heuristic optimization solver, enables tracking the most prone failure mechanism. At a second step, a coupled concurrent FE model with micro- and macroscales is assumed. A micromodeling description of the masonry is allocated to regions within the failure mechanism found in the former step. In converse, the other domain regions are modeled via a macroscale approach, whose constitutive response is elastic and orthotropic and formulated through closed-form homogenized-based solutions. The application of the framework is based on nonlinear static (pushover) analysis and conducted on three benchmarks: (i) an in-plane loaded URM shear wall; (ii) a U-shaped URM structure; and (iii) a URM church. Results are given in terms of load capacity curves, total displacement fields, and computational running time; and compared against those found with an FE microscopic model and with a limit analysis tool. Lastly, conclusions on the potential of the framework and future research streams are addressed.

22 citations

Journal ArticleDOI
TL;DR: In this paper, the elasticity modulus of the wall of a stone masonry wall was investigated using several experiments, numerical modeling, and empirical equations. And the authors highlighted the sources of uncertainties in these methods.

20 citations