Last edited by Nidal
Saturday, April 18, 2020 | History

2 edition of Seismic retrofit of bridge pile-caps found in the catalog.

Seismic retrofit of bridge pile-caps

Thad Durfey Saunders

Seismic retrofit of bridge pile-caps

  • 192 Want to read
  • 20 Currently reading

Published .
Written in English

    Subjects:
  • Bridges -- Puget Sound Region -- Earthquake effects.,
  • Engineering models -- Testing.,
  • Bridges -- Foundations and piers -- Testing.,
  • Earthquake resistant design.

  • Edition Notes

    Other titlesSeismic retrofit of bridge pile caps.
    Statementby Thad Durfey Saunders.
    The Physical Object
    Paginationxviii, 164 leaves, bound :
    Number of Pages164
    ID Numbers
    Open LibraryOL14704867M

    The base-isolation devices will result in increase in displacement response. The study of hysteretic behavior under cyclic test of both original and retrofitted structure reveals the increase in stiffness, strength and ductility. This tube was constructed at the bottom of San Francisco Bay through an innovative process. Inadequate seat width on supports: The inadequacy of seat width on bearing supports or at expansion joints have caused unseating of span.

    Concrete Jacketing This type of jacket uses a thick layer of reinforced concrete around the column. When the wall is opened for this purpose it may also be appropriate to tie vertical wall elements into the foundation using specialty connectors and bolts glued with epoxy cement into holes drilled in the foundation. Because of the additional height, the west bound landing would have to be extended about three blocks further west, or roughly to Northwest Fifth Avenue. The viscous dampers are reliable, easy in installation and efficient in operation. He sold the fired lime for use in cement, mortar, and other building materials.

    Substructure: The various types of deficiencies observed in RC columns and piers are i Lack of flexural strength, ii Lack of shear strength iii Insufficient transverse reinforcement and confinement iv In adequate lap splicing of longitudinal steel iv In adequate ductile detailing in plastic hinge region of columns iv Premature termination of longitudinal steel in piers v Insufficient strength of joints between pile cap beams. The active control system has better control and adaptivity than passive system, thus offers greater promise in bridge engineering Zaiguaing Wu, The passive methods have their own merits and limitations. Other members must then be secured to the sill plates with additional fittings. Techniques are found to be effective as evidenced by observed in laboratory testing. The ball may later be reset by the use of an external magnet. However, if analysis and re-design shows deficiency in foundation, retrofitting of foundation is carried out.


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Seismic retrofit of bridge pile-caps by Thad Durfey Saunders Download PDF Ebook

In Seismic Design and Retrofit of Bridges, three of Seismic retrofit of bridge pile-caps book world's top authorities on the subject have collaborated to produce the most exhaustive reference on seismic bridge design currently available. The areas of bridge engineering include planning, analysis and design, construction, maintenance, and rehabilitation.

The semi-active devices, which require much less external power as compared to active control, offer promise for applications in bridge structures. Earthquake Damages of Bridges In order to design suitable retrofit measures, it is appropriate to highlight common bridge damage types and failures that has occurred in past earthquakes in India.

Unexpected settlement of the tube has reduced the amount of slip that can be accommodated without failure. Design procedures: Design procedures of retrofitting using advanced composite materials are required to be developed.

Design methods are not fully developed. Structure unaffected. Structural control techniques: The passive methods such as base isolation, passive energy dissipating devices like dampers and active methods are to be explored further for their application in retrofitting.

The first decision should be based on results of detailed seismic evaluation and level of risk. An existing bridge can be replaced by a newly designed bridge to meet earthquake demands or upgraded in its strength by appropriate retrofitting measures. Pullen said one option would be to build a temporary two-lane detour bridge.

Abutment failure can occur due to increased earth pressure; abutment slumping is known to occur in soft soils. The bearing failure occurs in fixed bearings when these are unable to withstand the seismic force generated in the superstructure.

Structural Dynamics and Earthquake Engineering Books

To support the towers, engineers designed a full height structural wall that was integrated within each of the two existing towers. While Seismic retrofit of bridge pile-caps book base isolation tends to restrict transmission of the ground motion to the building, it Seismic retrofit of bridge pile-caps book keeps the building positioned properly over the foundation.

The district joined it with three adjacent properties to form the Mill Creek Redwood Preserve. This is also a common modification to highway cuts where appropriate conditions exist.

Post and extended what became known as the Old Coast Road south to his ranch. The Big Sur Land Trust stated it is not interested in acquiring the property.

This application provides tensile strength that stiffens the wall against bending away from the side with the application. In some cases, the best that can be done is to reduce the entrance of water runoff from higher, stable elevations by capturing and bypassing through channels or pipes, and to drain water infiltrated directly and from subsurface springs by inserting horizontal perforated tubes.

The falsework, built by crews led by E.Seismic retrofitting. The bridge was retrofitted beginning in with an analysis by bridge engineering company Buckland & Taylor as part of the Caltrans Phase II seismic retrofit program. In their detailed evaluation of the bridge's seismic vulnerabilities, they were challenged to find a solution that met several difficult issues, including Carries: SR 1.

Replacing corroded piles, including removal & replacement of deck sections & pile caps. Cowen Park Bridge Seismic Retrofit. Owner: City of Seattle (SDOT) General Contractor: Combined Construction, Inc. Scope: Retrofit Measures Include CFRP strengthening to columns, struts & arch rib. Crossbeam strengthening, infill walls, column retrofits.

practical bridge retrofit concepts to reduce damage produced by seismic motions A. Longinow and R. R. Robinson, IIT Research Institute, Chicago, Illinois W. Podolny, Federal Highway Administration, Washington, Size: 4MB.

The text includes over 2, tables, charts, illustrations, and pdf. The book covers new, innovative and traditional methods and practices; explores rehabilitation, retrofit, and maintenance; and examines seismic design and building materials. The fourth book, Seismic Design contains 18 chapters, and covers seismic bridge analysis and design.cntlcal, successful retrofitting was achieved by enlarging the footing plan size and providing additional piles.

Bridge structures have historically been vulnerable to seismic load­ ing, with numerous examples of damage occurring to both super­ structure and substructure elements and, in some cases, complete and catastrophic Size: KB.Seismic retrofitting.

The bridge was retrofitted beginning in with ebook analysis by bridge ebook company Buckland & Taylor as part of the Caltrans Phase II seismic retrofit program. In their detailed evaluation of the bridge's seismic vulnerabilities, they were challenged to find a solution that met several difficult issues, including Carries: SR 1.