Seismic Response Analysis of Continuous Multispan Bridges with Partial Isolation
Partially isolated bridges are a particular class of bridges in which isolation bearings are placed only between the piers top and the deck whereas seismic stoppers restrain the transverse motion of the deck at the abutments. This paper proposes an analytical formulation for the seismic analysis of...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2015/183756 |
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| author | E. Tubaldi A. Dall’Asta L. Dezi |
| author_facet | E. Tubaldi A. Dall’Asta L. Dezi |
| author_sort | E. Tubaldi |
| collection | DOAJ |
| description | Partially isolated bridges are a particular class of bridges in which isolation bearings are placed only between the piers top and the deck whereas seismic stoppers restrain the transverse motion of the deck at the abutments. This paper proposes an analytical formulation for the seismic analysis of these bridges, modelled as beams with intermediate viscoelastic restraints whose properties describe the pier-isolator behaviour. Different techniques are developed for solving the seismic problem. The first technique employs the complex mode superposition method and provides an exact benchmark solution to the problem at hand. The two other simplified techniques are based on an approximation of the displacement field and are useful for preliminary assessment and design purposes. A realistic bridge is considered as case study and its seismic response under a set of ground motion records is analyzed. First, the complex mode superposition method is applied to study the characteristic features of the dynamic and seismic response of the system. A parametric analysis is carried out to evaluate the influence of support stiffness and damping on the seismic performance. Then, a comparison is made between the exact solution and the approximate solutions in order to evaluate the accuracy and suitability of the simplified analysis techniques for evaluating the seismic response of partially isolated bridges. |
| format | Article |
| id | doaj-art-1c8e278c9dee47ecba840a7b31b01625 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-1c8e278c9dee47ecba840a7b31b016252025-02-03T05:50:43ZengWileyShock and Vibration1070-96221875-92032015-01-01201510.1155/2015/183756183756Seismic Response Analysis of Continuous Multispan Bridges with Partial IsolationE. Tubaldi0A. Dall’Asta1L. Dezi2Department of Construction, Civil Engineering and Architecture (DICEA), Polytechnic University of Marche, Via Brecce Bianche, 60131 Ancona, ItalySchool of Architecture and Design (SAD), University of Camerino, Viale della Rimembranza, 63100 Ascoli Piceno, ItalyDepartment of Construction, Civil Engineering and Architecture (DICEA), Polytechnic University of Marche, Via Brecce Bianche, 60131 Ancona, ItalyPartially isolated bridges are a particular class of bridges in which isolation bearings are placed only between the piers top and the deck whereas seismic stoppers restrain the transverse motion of the deck at the abutments. This paper proposes an analytical formulation for the seismic analysis of these bridges, modelled as beams with intermediate viscoelastic restraints whose properties describe the pier-isolator behaviour. Different techniques are developed for solving the seismic problem. The first technique employs the complex mode superposition method and provides an exact benchmark solution to the problem at hand. The two other simplified techniques are based on an approximation of the displacement field and are useful for preliminary assessment and design purposes. A realistic bridge is considered as case study and its seismic response under a set of ground motion records is analyzed. First, the complex mode superposition method is applied to study the characteristic features of the dynamic and seismic response of the system. A parametric analysis is carried out to evaluate the influence of support stiffness and damping on the seismic performance. Then, a comparison is made between the exact solution and the approximate solutions in order to evaluate the accuracy and suitability of the simplified analysis techniques for evaluating the seismic response of partially isolated bridges.http://dx.doi.org/10.1155/2015/183756 |
| spellingShingle | E. Tubaldi A. Dall’Asta L. Dezi Seismic Response Analysis of Continuous Multispan Bridges with Partial Isolation Shock and Vibration |
| title | Seismic Response Analysis of Continuous Multispan Bridges with Partial Isolation |
| title_full | Seismic Response Analysis of Continuous Multispan Bridges with Partial Isolation |
| title_fullStr | Seismic Response Analysis of Continuous Multispan Bridges with Partial Isolation |
| title_full_unstemmed | Seismic Response Analysis of Continuous Multispan Bridges with Partial Isolation |
| title_short | Seismic Response Analysis of Continuous Multispan Bridges with Partial Isolation |
| title_sort | seismic response analysis of continuous multispan bridges with partial isolation |
| url | http://dx.doi.org/10.1155/2015/183756 |
| work_keys_str_mv | AT etubaldi seismicresponseanalysisofcontinuousmultispanbridgeswithpartialisolation AT adallasta seismicresponseanalysisofcontinuousmultispanbridgeswithpartialisolation AT ldezi seismicresponseanalysisofcontinuousmultispanbridgeswithpartialisolation |