Measurement and interpretation of dynamic wheel loads on bridges (phase 2).

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Commission ofthe European Communities Directorate-General Information Market and Innovation , Luxembourg
SeriesTechnical steel research
ContributionsCommission of the European Communities. Directorate-General for Science, Research and Development.
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Open LibraryOL13987432M

Measurements on thirty motorway and over-motorway bridges showed that on average the motorway bridges had smoother surfaces; they had peak values of impact factor (ratio of dynamic to static wheel load) of from to while the overbridges had values of from to Most of the peak values occurred near the start or the end of the Cited by: 5.

Dynamic Wheel Loads From Bridge Strains It describes theoretical studies that use bridge measurements to estimate not only the equivalent static loads but also their dynamic variation with time. Acceptable estimates have been obtained.

Truck Load Models for Bridges. Structures Building on the Past, Cited by: The use of bridges to measure dynamic wheel loads.

Details Measurement and interpretation of dynamic wheel loads on bridges (phase 2). FB2

This paper describes theoretical studies which investigate the use of bridge measurements to determine not only equivalent static loads, but also their dynamic variation as service trucks cross a bridge.

The use of measured displacements, accelerations or bending moments is discussed (a).Cited by: 2. In addition to specifications of most codes, the dynamic effects of vehicles on bridges are considered by multiplying the static live loads by a dynamic load factor (DLF = δ) greater than one; DAF—there are many ways of interpreting this simple definition of Author: Ján Benčat, Robert Kohár.

The applied load to highway bridges depends on several traffic parameters such as weight of vehicles, axle load, configuration of axles, position of vehicles on the bridge, number of vehicles. COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.

Computation of the dynamic stress of long suspension bridges under multiloadings is essential for either the strength or fatigue assessment of the bridge. This paper presents a framework for dynamic stress analysis of long suspension bridges under wind, railway, and highway loadings.

HVTT Dynamic wheel loads of heavy vehicles – preliminary analysis 5 criteria for a low-cost tool for accurately measuring dynamic wheel loads on a variety of vehicles.

Consideration of airbag pressure measurement in estimating dynamic wheel load. "wheel load measuring mat" which can be used to measure the dynamic wheel loads generated by many uninstrumented vehicles. at Cambridge into the effects of dynamic axle loads, on roads, bridges, buildings (through ground-borne vibration) and buried pipes.

recorders and the recorded data was subsequently digitised for analysis by. if a vehicle wheel passes over a road surface irregularity it will be excited into vertical oscillatory motion and will generate dynamic variations of wheel load about its static load.

a test lorry, instrumented to measure dynamic variations of the load on its rear offside wheel, has been used to assess the variations that occur in practice on highway bridges.

measurements on thirty motorway. Measurement and analysis of wheel loads for design and fatigue evaluation of vehicle chassis components Article in Fatigue & Fracture of Engineering Materials & Structures 25(12) -   Next, the vibration mode shapes of the bridge deck and the model car are obtained from modal test.

Table 1 shows the identified frequencies and the damping ratios of the bridge deck, and Fig. 4 show the first 12 mode shapes of the bridge deck. Fig. 5 shows the first four mode shapes of the model car. According to Bakht and Jaeger, the rigidities of the equivalent orthotropic plate are found.

Impact Factor. Vehicular Live loads are multiplied with an Impact Factor to accommodate this dynamic effect in the design of bridges. The dynamic loads for moving vehicles are considered Impact in bridge engineering because of the relatively short duration.

The magnitude of the impact factor depends on the bridge span, stiffness and surface roughness, and vehicle dynamic characteristics. Dynamic Load Testing of Highway Bridges RETO CANTIENI ABSTRÀCT Between and the Swiss Federal Laboratories for!¡laterials Testing and Re- search (E!4PA) perforned dynamic load tests on beam and slab-type highway bridges; nost of them were concrete structures.

Test procedures as well as measurement and ilata processing techniques are briefly described. S1, S3 and S4 are used as primary sensors to measure axle load, S2, S5 are used as adjunct sensors to determine relative location of wheel loads and monitor pavement structure.

Download Measurement and interpretation of dynamic wheel loads on bridges (phase 2). PDF

The reason for choosing sensors S1, S3 and S4 as WIM sensor is that its installation location can get better strain response depending on model analysis previously [ 12 ].

Oscillatory wheel load fluctuation of considerable amplitude is always observed in railway cars traveling at high speed. This paper describes a continuous method for measuring the derailment coefficient and the forces between the wheel and rail.

The acceleration measured on the axle box indicates that the frequency of this fluctuation can be as high as 70 Hz. Continuous measurement of wheel. Various types of loads are considered for design of bridge structures. These loads and their combinations decides the safety of the bridge construction during its use under all circumstances.

The design loads should be considered properly for perfect design of bridge. Different design loads acting on bridges are explained below.

Contents:Types of Loads for Design […]. Laboratory tests are described that explore the validity of using bridge measurements to determine not only equivalent static wheel loads but also their dynamic variation with time.

A lm span composite girdcr was loadcd with one to four dynamic loads fixed in location. a vehicle travelling along anything other than a perfectly flat and horizontal road surface will, due to excitation of its suspension, apply dynamic wheel loads to the road which vary about its static wheel loads.

these variations influence the vehicle's ride and roadholding ability and also its ability to damage road structures, and to generate vibrations in bridges and in buildings adjacent.

Description Measurement and interpretation of dynamic wheel loads on bridges (phase 2). FB2

tests to determine the actual wheel loads, both static and dynamic, being transmitted to the pavement. Static measurements on a beam balance considering only the effect of load shift due to road crown were not significant and did not explain the observed pavement conditions.

The effect of the crown caused a load shift of only 1 percent or less. Get this from a library. Distribution of wheel loads on highway bridges. [Wallace W Sanders; H A Elleby] -- Proposed revisions are presented to those sections of the AASHO specifications for highway bridges having to do with the distribution of wheel loads on bridge decks.

The static distribution of. The dynamic wheel load was measured on rigid and deformable grounds using strain-gage-based transducers. Frequency analysis presented a combination of the effects of the ground profile and tire characteristics on wheel-load variations.

The book contains proceedings presented at the 9th International Conference on Arch Bridges held in Porto, Portugal on October 2 to 4, It is.

Transportation Research Board > Blurbs > Measurement and Analysis of Dynamic Wheel Loads. Measurement and Analysis of Dynamic Wheel Loads Austroads has released a report that explores the dynamic forces that heavy vehicles apply to road pavements and the effects that these forces have on pavement performance.

The simplest type of a bridge is stepping stones, so this may have been one of the earliest types. Neolithic people also built a form of boardwalk across marshes; examples of such bridges include the Sweet Track and the Post Track in England, approximately years old. Undoubtedly ancient peoples would also have used log bridges; that is a timber bridge that fall naturally or are.

An Innovative Measurement System for Measuring Dynamic Wheel Forces and Moments of a Two-wheeler Tyres are the primary contact between the vehicle and the road.

It serves as the medium of communication between the road and the rider, which it does in terms of road loads. Dynamic Wheel Load Measurements on Real Road Surfaces - What Accuracy to Expect.

In recent years we have seen drastic improvements of the accuracy of wheel force transducer (WFT) systems / 1, 2 and 3 /. Dynamic Wheel Loads from Bridge Strains O'Connor, Colin & Chan, Tommy H.T.

() Dynamic Wheel Loads from Bridge Strains. Journal of Structural Engineering, (8), pp. Traditional methods used for analysis of dynamic live loads on bridges use simplifications. This results in dynamic loads tending to be very conservative if not ignored.

Ignoring the dynamic nature of live loads is not very convenient, and may result in premature damage of the bridge structure or a decrease in the bridge lifespan. 1 Manuscript for Annual Meeting Compendium of Papers 2 3 Evaluation of Dynamic and Impact Wheel Load Factors and their 4 Application for Design 5 6 TRB 7 8 Transportation Research Board 93rd Annual Meeting 9 10 Submitted: Novem 11 12 13 Brandon J.

Van Dyk1,2, Marcus S. Dersch3, J. Riley Edwards3, Conrad J. Ruppert, Jr.3, and. The principle for the measurement of the dynamic wheel load is based on the dynamic response of a rear tire moving in a straight line in a steady-state condi- tion.

A free-body diagram of a driven tire and wheel Measurement and Frequency Analysis of Dynamic Vertical Wheel Load of Farm Tractor 63 and two photo switches were used to measure.This paper presents a new method of identifying dynamic vehicular axle loads by directly using bridge measurements.

To demonstrate how the proposed methodology works out, vehicle-bridge coupling equations are first established for numerical simulations.dynamic behavior of the bridge under a moving load, a modal analysis followed by an implicit dynamic analysis was carried out. Acceptable agreement was found between the field measurements and FE simulation.

Most concerned dynamic response was strains at different locations in bridge girders and columns, because it is the only critical.