Effects of Debris on Bridge Pier Scour
Effects of Debris on Bridge Pier Scour

Author: Peter Frederick Lagasse

Publisher: Transportation Research Board

Published: 2010

Total Pages: 177

ISBN-13: 0309118344

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TRB's National Cooperative Highway Research Program (NCHRP) Report 653: Effects of Debris on Bridge Pier Scour explores guidelines to help estimate the quantity of accumulated, flow event debris, based on the density and type of woody vegetation and river bank condition upstream and analytical procedures to quantify the effects of resulting debris-induced scour on bridge piers. The debris photographic archive, the survey questionnaire and list of respondents, and the report on the field pilot study related to development of NCHRP 653 was published as NCHRP Web-Only Document 148: Debris Photographic Archive and Supplemental Materials for NCHRP Report 653.

The Manual of Bridge Engineering
The Manual of Bridge Engineering

Author: M. J. Ryall

Publisher: Thomas Telford

Published: 2000

Total Pages: 1046

ISBN-13: 9780727727749

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- Bridge type, behaviour and appearance David Bennett, David Bennett Associates · History of bridge development · Bridge form · Behaviour - Loads and load distribution Mike Ryall, University of Surrey · Brief history of loading specifications · Current code specification · Load distribution concepts · Influence lines - Analysis Professor R Narayanan, Consulting Engineer · Simple beam analysis · Distribution co-efficients · Grillage method · Finite elements · Box girder analysis: steel and concrete · Dynamics - Design of reinforced concrete bridges Dr Paul Jackson, Gifford and Partners · Right slab · Skew slab · Beam and slab · Box - Design of prestressed concrete bridges Nigel Hewson, Hyder Consulting · Pretensioned beams · Beam and slab · Pseduo slab · Post tensioned concrete beams · Box girders - Design of steel bridges Gerry Parke and John Harding, University of Surrey · Plate girders · Box girders · Orthotropic plates · Trusses - Design of composite bridges David Collings, Robert Benaim and Associates · Steel beam and concrete · Steel box and concrete · Timber and concrete - Design of arch bridges Professor Clive Melbourne, University of Salford · Analysis · Masonry · Concrete · Steel · Timber - Seismic analysis of design Professor Elnashai, Imperial College of Science, Technology and Medicine · Modes of failure in previous earthquakes · Conceptual design issues · Brief review of seismic design codes - Cable stayed bridges - Daniel Farquhar, Mott Macdonald · Analysis · Design · Construction - Suspension bridges Vardaman Jones and John Howells, High Point Rendel · Analysis · Design · Construction - Moving bridges Charles Birnstiel, Consulting engineer · History · Types · Special problems - Substructures Peter Lindsell, Peter Lindsell and Associates · Abutments · Piers - Other structural elements Robert Broome et al, WS Atkins · Parapets · Bearings · Expansion joints - Protection Mike Mulheren, University of Surrey · Drainage · Waterproofing · Protective coating/systems for concrete · Painting system for steel · Weathering steel · Scour protection · Impact protection - Management systems and strategies Perrie Vassie, Transport Research Laboratory · Inspection · Assessment · Testing · Rate of deterioration · Optimal maintenance programme · Prioritisation · Whole life costing · Risk analysis - Inspection, monitoring, and assessment Charles Abdunur, Laboratoire Central Des Ponts et Chaussées · Main causes of deterioration · Investigation methods · Structural evaluation tests · Stages of structural assessment · Preparing for recalculation - Repair and Strengthening John Darby, Consulting Engineer · Repair of concrete structures · Metal structures · Masonry structures · Replacement of structures

Study of Tsunami-induced Fluid and Debris Load on Bridges Using the Material Point Method
Study of Tsunami-induced Fluid and Debris Load on Bridges Using the Material Point Method

Author: Wen-Chia Yang

Publisher:

Published: 2016

Total Pages: 143

ISBN-13:

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This research focuses on the development of techniques for the material point method (MPM) modeling the fluid-solid interaction, and gives preliminary results for researchers and engineers trying to understand the demands on bridge superstructures by tsunami-driven debris. First, a numerical flux smoothing algorithm is proposed to stabilize (nearly) incompressible fluid simulations with a control mechanism (i.e. numerical flux). Secondly, an enhanced boundary modeling technique is presented to decouple the geometries of grids and boundaries, by introducing boundary specific force fields for applying boundary conditions. Both of the newly developed algorithms are validated with numerical examples and test cases, ranging from fundamental hydrostatic problems to tsunami flows interacting with bridges. In the end, with the new algorithms, debris-induced loads, impacts and loads caused by damming effect, on bridges during a tsunami are studied. Results show (1) tsunami-driven debris can significantly increase demands on bridges compared with no-debris cases; (2) when flow is partially blocked by debris, peak horizontal forces are proportional in the order of about 3.6 to net cross-section area of the water flow at initial conditions; (3) impact forces are related to contact areas and propagation path of stress waves; and (4) contribution of water flow to the debris-induced impact forces can vary from 25 to 35 percent of those in the corresponding in-air cases.