Increased load capacity of arch bridge using slab rein as long as ced concrete Outline Introduction Strengthening Techniques

Increased load capacity of arch bridge using slab rein as long as ced concrete Outline Introduction Strengthening Techniques www.phwiki.com

Increased load capacity of arch bridge using slab rein as long as ced concrete Outline Introduction Strengthening Techniques

Rodriguez, Alisa, Managing Editor has reference to this Academic Journal, PHwiki organized this Journal Increased load capacity of arch bridge using slab rein as long as ced concrete T.G. Hughes & M. Miri Cardiff School of Engineering Arch 04, Barcelona, Nov. 17-19, 2004 Outline Introduction Strengthening Techniques Model details in addition to description Soil / Masonry interaction Service load results Ultimate load results Conclusions Introduction Considerable interest in the UK in repair techniques Closure of the road during construction is an issue Much debate about “Strengthening” v “Repair” Objective of this study – to investigate a less intrusive as long as m of rein as long as cement

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Strengthening Techniques Grouting Saddling Lining Rein as long as ced masonry Grouting Effectively stiffens soil in addition to r in addition to om rubble masonry Can be achieved with minimum disruption from surface or soffit Unquantifiable improvement May create difficulties with future flexibility Saddling Forms new arch with existing barrel as shutter Disruptive to traffic during construction Composite action difficult to model A “new” bridge Some question marks on long term flexibility

Lining Less disruption during construction Normally “adds” to existing barrel Loss of headroom Loss of visual effect Some concern about durability Rein as long as ced Masonry Undertaken by drilling or slot cutting in intrados Can be achieved with minimum disruption Slot cutting can cause loss of visual effect May create difficulties with future flexibility May be issues about long term durability of bond between rein as long as cement in addition to masonry Surface Slab Rein as long as cement

Surface Slab Rein as long as cement Can be achieved with minimum disruption Maintains integrity of arch behaviour Issues about utility service access Relatively cheap solution Surface Slab Rein as long as cement Works by increasing load distribution without increasing load Also provides additional support to soil in preventing sway movements Increases resistance of soil Effects 1

Effects 2 Effects 3 Centrifuge Models Undertaken some 50+ scale models of arch bridges at 6, 12g, 20g in addition to 55g Stresses are as full scale, similar materials –there as long as e full scale strains Full range of instrumentation pressure sensors, LVDTsm Load cells in addition to moving loads

Model description 1/12 scale, 6-m single span Shallow & Deep geometry Three ring arch Bricks Micro concrete Rein as long as cement Test Methodology Build “New” Arch Undertake service load – typically 14 passes Load at 1/4 or 1/3 point to peak in addition to unload Remove in addition to strengthen Repeat service loading Load at 1/4 or 1/3 point until collapse Model Details

Model Package Model under construction Model under construction

Model under construction Concrete slab being cast Typical model under test

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Service load Steel roller (equal 12 tonnes) Whole Width Soil / Masonry interaction Arch deflection Load direction effect Result Nomenclature Actual benchmark (“new”) result Average over a series of “new” arches Strengthened result Soil / Masonry interaction

Service load results Shallow arch at ¾ span Service load results Deep arch at 3/4 Span Service load results Arch deflection (Load at 50% of Span)

Conclusions Construction with limited disruption Rein as long as ced concrete equally as effective as when acting compositely with the barrel Should maintain flexibility of exiting arch to respond to future movements

Rodriguez, Alisa Managing Editor

Rodriguez, Alisa is from United States and they belong to Latino Perspectives and they are from  Phoenix, United States got related to this Particular Journal. and Rodriguez, Alisa deal with the subjects like Hispanic Interest

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This Particular Journal got reviewed and rated by Columbia International University and short form of this particular Institution is US and gave this Journal an Excellent Rating.