2 edition of Design curves for the effects of concentrated loads on concrete bridge decks found in the catalog.
Design curves for the effects of concentrated loads on concrete bridge decks
Peter Beaumont Morice
by Cement and Concrete Association
Written in English
|Statement||by P.B.Morice, G.Little, and R.E.Rowe.|
|Contributions||Little, G., Rowe, Roy Ernest., Cement and Concrete Association.|
|The Physical Object|
|Number of Pages||36|
This paper presents design recommendations of non-composite reinforced concrete bridge decks subjected to fatigue due to moving loads. These recommendations are based on test results of 1/3- and 1/ scale physical models of a full-scale cm ( in.) thick and m (ft) long simply supported non-composite reinforced concrete by: 1. P. B. Morice has written: 'Design curves for the effects of concentrated loads on concrete bridge decks' Asked in Authors, Poets, and Playwrights What has the author Gerard Cox written?
Design loads In the parametric study, the design loads consisted of dead load and live load typically used in the design of precast, prestressed concrete bridge girders. These loads are defined as follows. Dead load Dead load consists of the self-weight of the precast concrete girder and reinforced concrete topping slab and superimposed dead loads. For transverse design, the segment is considered as a reinforced concrete section, and code checks are made accordingly. For this design, local distribution of wheel load, together with Self Weight and SIDL results, were Design of continuity slabs and the.
Bridge deck slabs are one of the most exposed bridge parts and are often critical for the load carrying capacity. Nowadays, design procedures for concrete slabs regarding bending moment are well-known. However, there is still a lack of well-established recommendations for distribution of shear forces from concentrated loads. Concrete floor slabs on grade are subjected to a varie ty of loads and loading conditions. The design procedure includes determini ng slab thickness based on moving live loads and then checking adequacy of slab thickness for stationary live load. The design procedure separately incl udes determining thickness of slab under wall Size: KB.
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B = load footprint width transverse to the deck span. When the load centroid is not at the center of the footprint, let B equal twice the least dimension from the centroid to the baseplate edge; inches.
be = effective distribution width; inches X = percentage of span, measured from the nearest support to the center of the concentrated load, ≤ structural failures of properly designed bridge decks are known. Thus, increasing the design shear ca-pacity of bridge decks seems to be possible.
This paper presents results from slab tests and statistical evaluations of a shear database which justify a signiﬁcant increase in design shear for concrete bridge decks. 1 INTRODUCTION. Load Capacity of Concrete Bridge Decks ultimate capacity of bridge decks.
The Ontario bridge deck design resulted from ex 1 and 2, respectively [curves and Bmax values from Beal (lll.
These results are compared with the 71 Figure 3. Punching failure on model 1. Meant for design engineers, contractors, their clients and field engineers, the book presents a practical and systematic methodology to enable quick and accurate design decisions.
A step-by-step approach has been adopted throughout the text reflecting the order in which a practicing professional might proceed for designing a concrete bridge. STRUCTURAL DESIGN GUIDELINES FOR CONCRETE BRIDGE DECKS REINFORCED WITH CORROSION-RESISTANT REINFORCING BARS Abraham Lama Salomon Graduate Research Assistant Cristopher D.
Moen, Ph.D., P.E. Associate Professor The Charles E. Via, Jr. Department of Civil and Environmental Engineering Virginia Polytechnic and State University VCTIR Project Manager. The concrete subcontractor poured the concrete decks to finish floor elevation, not to deck thickness which is required per note CP‐4.
The concrete acts as a live load during the pours and on this project caused the steel to deflect up to 2” in some cases because no shoring was required. Design codes are issued by a professional organization interested in insuring safety and standards.
They are legally backed by the engineering profession. Different design methods are used, but they typically defined the load cases or combination, stress or strength limits, and deflection limits. Load Types Loads used in design load equations are given letters by type: D = dead loadFile Size: 1MB.
Concentrated load kips for moment kips for shear Uniform loading lb/ft of load lane Live Loads for Bridges You can probably see that once the loading has been selected, you have to determine the critical position of the truck on the structure (bridge). This is an excellent application for influence lines.
Live Loads for BridgesFile Size: KB. Curved Bridge Design. proposed a method for the determination of spatial funicular polygons for the design of curved bridges by introducing planes as Concentrated Loads.- Deep Beams. shown on pages 42 and 43 of our Design Manual and Catalog of Steel Deck Products.
Example Problems For Concentrated Loads Example 1: Point Load This problem is designed to demonstrate how to check the ability of a composite slab to carry a lb point load over an area of " x " occurring anywhere in the span.
This problem is. This paper presents an investigation on the effects of construction loads and vibrations on typical newly poured reinforced concrete bridge decks. The main objective of this paper was to perform dynamic finite-element analyses of concrete bridge decks under construction loads and vibrations.
often increase the degree of risk. Concentrated loads, such as construction materials stacked on the formwork, non-symmetrical placement of concrete, uplift, impact of machine delivered concrete, use of motorized carts and extreme formwork height, are examples that produce high risk factors.
Steel Bridge Design Handbook: Bridge Deck Design 5. Report Date November 6. Performing Organization Code 7. Author(s) Three-span Continuous Curved Tub-Girder Bridge concrete decks can utilize post-tensioning steel in addition toFile Size: 2MB.
• The behavior of the bridge will be examined under wet concrete load only. FRAMING PLAN Intermediate Crossframe Effects. 6 reactions to be concentrated at the obtuse corners of a Deflected Shape Under Wet Concrete Load with End Crossframe Effects Only (Exaggerated Scale): 27 Test Structure, Girder End TwistFile Size: KB.
A design procedure for slabs subjected to concentrated loads is presented. Current procedures, except for bridge decks, do not specifically treat concen-trated loads.
The five-step procedure provides for the actions peculiar to concentrated loads as well as the effects of all : Joseph A. Appleton. The design lane load consists of a load of klf ( kN/m) uniformly distributed in the longitudinal direction.
Transversely, the design lane load is assumed to be uniformly distributed over a m ( ft) width. The force effects from the design lane load are not be subject to a dynamic load allowance.
Download: Download full-size imageAuthor: A. Nowak, A. Pipinato. Design Step 5 –Design of Superstructure Prestressed Concrete Bridge Design Example Task Order DTFHT DC parapet = () = k/ft = /6 girders = k/ft/girder for one parapet Therefore, the effect of two parapets yields: DC parapet =.
Bridge Design to Eurocodes Worked examples Worked examples presented at the Workshop “Bridge Design to Eurocodes”, Vienna, October Support to the implementation, harmonization and further development of the Eurocodes Y. Bouassida, E. Bouchon, P. Crespo, P. Croce, L. Davaine, S.
Denton, M. Feldmann, R. Frank. bined with a single moving concentrated load, positioned to produce the maximum stress (for continuous spans, two concentrated loads -- one placed in each of two adjoining spans -- are used to determine maximum negative moment).
Both the uniform load and the concentrated loads are assumed to be transversely distributed over a foot Size: KB. An improved methodology was created by refining the guidance for estimating wave loads on bridge decks. This new methodology demonstrates a significant increase in the reliability of wave load estimates on a bridge superstructure during severe storm conditions.
Static Behavior of Noncomposite Concrete Bridge Decks under Concentrated Loads. This moment per unit length can then be converted into a equivalent uniform load due to the concentrated load by back solving the equation M = w*L 2 /8.
The equivalent uniform load can then be added to any superimposed loads and self weight to get a total uniform load on the metal deck.bottom of the bridge deck in the primary direction. 2. Shear Effects. By using the strip method, an 8-in. deck is designed for flexure, and shear effects can be neglected.
Figure. A illustrates the cross section of a typical beam-slab bridge with four beams spaced at 10 ft, a minimum-depth 8-in. concrete deck, and concrete Size: 1MB.Updated design tables for common steel roof deck profiles, fasteners and conditions along with 13 new and updated design examples are included in this manual.
The latest recommendations for concentrated loads, reinforcement of openings and steel deck on cold-formed trusses are also available in this publication.