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Author: Božidar Stojadinović
Publisher:
ISBN:
Category : Bridges, Concrete
Languages : en
Pages : 184
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Book Description
The collapse of the Cypress Street Viaduct during the 1989 Loma Prieta earthquake emphasized the vulnerability of elevated freeway bridge structures. A part of the joint Caltrans and University of California at Berkeley research project, initiated after the earthquake, focused on the outrigger knee joint systems found in bents of elevated freeway bridges. The investigation had two principal goals: to evaluate the behavior of the existing outrigger knee joint systems under a combined transverse and longitudinal loading and to devise and experimentally verify strategies for seismic upgrading of existing outrigger knee joints. The experiments on two half-scale as-built models confirmed the poor performance of existing outrigger knee joint systems observed after the earthquake. Two seismic upgrading strategies, a "ductile" and a "strong" strategy, were proposed and tested on prototype specimens. The "strong" strategy was chosen for the final seismic upgrade design. The variation of this strategy using a steel jacket, was recommended in the seismic upgrade design guidelines.
Author: Božidar Stojadinović
Publisher:
ISBN:
Category : Bridges, Concrete
Languages : en
Pages : 184
Get Book Here
Book Description
The collapse of the Cypress Street Viaduct during the 1989 Loma Prieta earthquake emphasized the vulnerability of elevated freeway bridge structures. A part of the joint Caltrans and University of California at Berkeley research project, initiated after the earthquake, focused on the outrigger knee joint systems found in bents of elevated freeway bridges. The investigation had two principal goals: to evaluate the behavior of the existing outrigger knee joint systems under a combined transverse and longitudinal loading and to devise and experimentally verify strategies for seismic upgrading of existing outrigger knee joints. The experiments on two half-scale as-built models confirmed the poor performance of existing outrigger knee joint systems observed after the earthquake. Two seismic upgrading strategies, a "ductile" and a "strong" strategy, were proposed and tested on prototype specimens. The "strong" strategy was chosen for the final seismic upgrade design. The variation of this strategy using a steel jacket, was recommended in the seismic upgrade design guidelines.
Author: Božidar Stojadinović
Publisher:
ISBN:
Category :
Languages : en
Pages : 428
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Book Description
Author:
Publisher:
ISBN:
Category : Buildings
Languages : en
Pages : 582
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Book Description
Author: Kosalram Krishnan
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 392
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Book Description
Author:
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 272
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Book Description
Author: Koichi Akai
Publisher: DIANE Publishing
ISBN: 0788125389
Category :
Languages : en
Pages : 168
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Book Description
The Jan. 17, 1995, Hyogoken-Nanbu Earthquake was one of the worst disasters to hit Japan in almost half a century. It has been compared in its impact to the great Kanto (Tokyo) Earthquake of 1923. The Kobe-Osaka region held many similarities in its geologic and tectonic setting to many areas along the West Coast, and possibly, other areas of the U.S. A geotechnical reconnaissance to identify the relevant problems and issues was organized. This report provides a timely, first-hand overview of the type and extent of the geotechnical aspects of the damage.
Author: Amir S. Gilani
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 164
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 352
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Book Description
Author: Reginald DesRoches
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 236
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Book Description
Author: Mark Aschheim
Publisher:
ISBN:
Category : Concrete bridges
Languages : en
Pages : 216
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Book Description
In this report, seismic design approaches for reinforced concrete bridges are reviewed and uncertainties in seismic design and evaluation are discussed. The modeling of bridge components and systems is discussed, and analytical studies of the response series of simple bridges are made. The relative utility of several design approaches and stiffness assumptions for controlling seismic demands is assessed. Modeling of column and wall pier flexural and shear strengths is examined in detail, and available models for the inelastic shear strength of columns are compared with test data.
