Fig 6 - uploaded by Dénes Kollár
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A typical Abbott-Firestone curve, with bearing area S mr (c) and minimum secant slope tan(α), transformed for out-of-flatness (Δw) measurements.
Source publication
![Fig. 7. Measured out-of-flatness [mm] results for bridges with box...](profile/Denes-Kollar/publication/360602529/figure/fig4/AS:1155681793126402@1652547419696/Measured-out-of-flatness-mm-results-for-bridges-with-box-section-a-Bridge-1-b-c_Q320.jpg)
![Fig. 8. Measured out-of-flatness [mm] results for bridges with open...](profile/Denes-Kollar/publication/360602529/figure/fig5/AS:1155681793130497@1652547419791/Measured-out-of-flatness-mm-results-for-bridges-with-open-section-a-Bridge-6_Q320.jpg)
Deformations of bottom flanges in the vicinity of bridge bearings, i.e., in bearing areas, due to manufacturing and loading can result in serious problems in service life and damages in bridge superstructures and structural bearings coming from nonuniform stress distribution. The paper focuses on the out-of-flatness measurement of bearing areas usi...
Contexts in source publication
Context 1
... in order to find the three interfacing points representing each contact surface and determine characteristic parameters such as maximum out-of-flatness. In addition, the analogy of Abbott-Firestone curves [32] is used describing and evaluating the surface texture as well for each scenario. From a mathematical point of view, Abbott-Firestone curve (Fig. 6) is the cumulative distribution function of the surface profile (i.e., out-offlatness in the current paper). However, it is generally used as bearing area curves in roughness measurements and the curve denotes specific surface roughness parameters such as core roughness depth, reduced peak height and valley depth, material ratios, etc. ...
Context 2
... the current paper). However, it is generally used as bearing area curves in roughness measurements and the curve denotes specific surface roughness parameters such as core roughness depth, reduced peak height and valley depth, material ratios, etc. In the current paper, areal material ratio (bearing area) S mr (c) at a specified out-of-flatness c (Fig. 6) is used according to ISO 25178-2, where c denotes the permitted total deformation limit Δw 1 + Δw 2 for each measured case. In addition, minimum secant slope tan(α) is also determined using two points separated by 40% on the horizontal axis and shifted along the curve in order to evaluate the minimum slope according to the ...
Citations
... A displaced support or an excessively deformed support is due to design or execution errors. These errors force the bearings to adopt positions they are not intended for, or even support loads much greater than those initially projected [37]. The origin of a displaced support can also be due to movements of the foundation (seating of the pier or abutment or twists of the pier or abutment). ...
The use of Remotely Piloted Aircraft System (RPAS), better known as drones, has spread with multiple and very diverse applications on last years. It includes, among other matters, the civil engineering structures inspections. From an inspection of a viaduct this article was born precisely. The inspection was conducted by the author experimentally, in order to demonstrate that the little aircraft can serve as a quality tool to make this work that is being carried out by qualified personnel and expensive auxiliary means currently. At the end, the author try to demonstrate that we can obtain identical, or even better, quality results, reducing the health and safety risks for the workers who do that work, with time and costs significant savings.
