The Experts below are selected from a list of 768 Experts worldwide ranked by ideXlab platform
Koichiro Ishikawa - One of the best experts on this subject based on the ideXlab platform.
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Earthquake Response Control of Double-Layer Truss Walls by means of Innovative Fuse Connections
Hindawi Limited, 2018Co-Authors: Koichiro IshikawaAbstract:This study deals with partial cylindrical truss walls equipped with damper connections due to horizontal earthquake motions. The damper connection consists of an aluminum ball joint, an aluminum hub, and a steel bolt. A ductile elongation of the steel bolt due to a tensile stress is expected by avoiding the brittle collapse. The study proposes a fuse-type connection by means of yield of the steel bolt due to tension stress realized by the ductile failure collapse mechanism of the wall-type spatial structure. The proposed truss wall with the fuse-type connection can realize a deformation of nodes within the restriction for avoiding a Nonstructural Member damage. It is confirmed in the dynamic elastoplastic analysis that the control of the dynamic collapse mechanism such as the steel bolt elongation can avoid a brittle collapse mechanism such as a chain of Member buckling. The evaluation method is also proposed by means of the limit displacement considering a ductility factor of the steel bolt within 2.0
Özakgül Kadir - One of the best experts on this subject based on the ideXlab platform.
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Seismic assessment of a curved multi-span simply supported truss steel railway bridge
'Tulpar Academic Publishing', 2018Co-Authors: Yılmaz, Mehmet Fatih, Çağlayan, Barlas Özden, Özakgül KadirAbstract:Fragility curve is an effective method to determine the seismic performance of a structural and Nonstructural Member. Fragility curves are derived for Highway Bridges for many studies. In Turkish railway lines, there are lots of historic bridges, and it is obvious that in order to sustain the safety of the railway lines, earthquake performance of these bridges needs to be determined. In this study, a multi-span steel truss railway bridge with a span length of 25.7m is considered. Main steel truss girders are supported on the abutments and 6 masonry piers. Also, the bridge has a 300m curve radius. Sap 2000 finite element software is used to model the 3D nonlinear modeling of the bridge. Finite element model is updating according to field test recordings. 60 real earthquake data selected from three different soil conditions are considered to determine the seismic performance of the bridge. Nonlinear time history analysis is conducted, and maximum displacements are recorded. Probabilistic seismic demand model (PSDMs) is used to determine the relationship between the Engineering Demand Parameter (EDP) and Intensity Measure (IMs). Fragility curve of the bridge is derived by considering the serviceability limit state, and results are discussed in detail
Yılmaz, Mehmet Fatih - One of the best experts on this subject based on the ideXlab platform.
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Seismic assessment of a curved multi-span simply supported truss steel railway bridge
'Tulpar Academic Publishing', 2018Co-Authors: Yılmaz, Mehmet Fatih, Çağlayan, Barlas Özden, Özakgül KadirAbstract:Fragility curve is an effective method to determine the seismic performance of a structural and Nonstructural Member. Fragility curves are derived for Highway Bridges for many studies. In Turkish railway lines, there are lots of historic bridges, and it is obvious that in order to sustain the safety of the railway lines, earthquake performance of these bridges needs to be determined. In this study, a multi-span steel truss railway bridge with a span length of 25.7m is considered. Main steel truss girders are supported on the abutments and 6 masonry piers. Also, the bridge has a 300m curve radius. Sap 2000 finite element software is used to model the 3D nonlinear modeling of the bridge. Finite element model is updating according to field test recordings. 60 real earthquake data selected from three different soil conditions are considered to determine the seismic performance of the bridge. Nonlinear time history analysis is conducted, and maximum displacements are recorded. Probabilistic seismic demand model (PSDMs) is used to determine the relationship between the Engineering Demand Parameter (EDP) and Intensity Measure (IMs). Fragility curve of the bridge is derived by considering the serviceability limit state, and results are discussed in detail
Çağlayan, Barlas Özden - One of the best experts on this subject based on the ideXlab platform.
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Seismic assessment of a curved multi-span simply supported truss steel railway bridge
'Tulpar Academic Publishing', 2018Co-Authors: Yılmaz, Mehmet Fatih, Çağlayan, Barlas Özden, Özakgül KadirAbstract:Fragility curve is an effective method to determine the seismic performance of a structural and Nonstructural Member. Fragility curves are derived for Highway Bridges for many studies. In Turkish railway lines, there are lots of historic bridges, and it is obvious that in order to sustain the safety of the railway lines, earthquake performance of these bridges needs to be determined. In this study, a multi-span steel truss railway bridge with a span length of 25.7m is considered. Main steel truss girders are supported on the abutments and 6 masonry piers. Also, the bridge has a 300m curve radius. Sap 2000 finite element software is used to model the 3D nonlinear modeling of the bridge. Finite element model is updating according to field test recordings. 60 real earthquake data selected from three different soil conditions are considered to determine the seismic performance of the bridge. Nonlinear time history analysis is conducted, and maximum displacements are recorded. Probabilistic seismic demand model (PSDMs) is used to determine the relationship between the Engineering Demand Parameter (EDP) and Intensity Measure (IMs). Fragility curve of the bridge is derived by considering the serviceability limit state, and results are discussed in detail
