Abstract
The main purpose of this study is to compare the static and dynamic behavior of a historical single-span masonry arch bridge under different near-fault earthquakes. The historical Tokatlı Bridge, built in Karabük, is chosen for this study. To investigate the behavior of near-fault earthquakes on the historical masonry bridge, first, a finite element model is built and analyzed under various near-fault earthquakes by using ANSYS and SAP2000. To build a finite element model, 162920 nodes and 47818 elements are used in ANSYS. First, finite element analysis results are compared to each other under Earth gravity. Then, ground motions near the fault are chosen to be used in this study. These earthquakes can be listed as follows: Cape Mend (1992), Kobe (1995), Superstition Hills (1987), Northridge (1994), Imperial Valley (1979), and Chi-Chi (1999). The behavior of the single-span historical bridge is obtained under these ground motions, and the results are compared with each other using contour diagrams using ANSYS. Furthermore, at the end of these analyses, it is observed that the tensile stresses have reached the permissible masonry tensile strength, especially on the upper side of the large belt, on the upper side of the belt, and on the side of the belt, and pose a risk for damage.
Highlights
In the past periods where today’s engineering facilities and construction materials were not available, it was possible to pass large openings or carry heavy loads with the arch form which is one of the basic elements of the historical bridge design
It is of the most importance to ensure the safety of these historical bridges against the dynamic loadings of traffic, wind, and earthquakes. is task requires the accurate identification of the dynamic characteristics of these existing bridges [1]
Altunisık et al [24] conducted a detailed research on the comparison of the static and dynamic behavior of historical masonry arch bridges based on different arch curvatures
Summary
In the past periods where today’s engineering facilities and construction materials were not available, it was possible to pass large openings or carry heavy loads with the arch form which is one of the basic elements of the historical bridge design. Altunisık et al [24] conducted a detailed research on the comparison of the static and dynamic behavior of historical masonry arch bridges based on different arch curvatures For this purpose, to determine the static and dynamic behavior of the bridge, the finite element model is used [24]. Linear and nonlinear dynamic analyses of historical Nadir Bridge are assessed by Sayin [27] For this purpose, the bridge is modeled with three-dimensional finite elements and seismic response of the bridge is investigated. In this part of the study, the FE model of the historical Tokatlı Bridge is built and analyzed under various near-fault earthquakes by using the finite element program For this purpose, first, 3D nonlinear finite element program is generated by using ANSYS [36]. In ANSYS, a larger number of nodes in a FE model lead to excessive computation time. erefore, Tetrahedron meshing option as it has a better size distribution and fewer nodes throughout the FE model is selected. e largest mesh size giving stable results is chosen for the FE model [42, 43]. e maximum strain value in the historical Tokatlı Bridge remains nearly constant for both 50 mm and 25 mm mesh sizes (0.012443 and 0.012466, respectively). us, mesh sizes are taken as 25 mm in the contact areas of the model and 50 mm in the rest of the model
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