Abstract
In bridge design one of the main design criteria is fatigue. Better understanding, correlation and correct design rules are important to ensure safety. New code for the design of bridge structures made of aluminium alloys are being developed in Russian Federation. The authors tested a full scale pedestrian bridge for static and cyclic loading. The results of the experiment and numerical simulation are analyzed and presented in this article.
Highlights
During the development of the code «Bridges with aluminum alloy structures
The zone in which the maximum stress concentration is determined is the weakest point in terms of fatigue tests
The calculation showed that the concentration has a local disposition and almost fades away at the distance from the node, and practically does not affect the loadcarrying capacity under static loading
Summary
Design rules», the specialists of the Moscow State University of Civil Engineering conducted static and fatigue testing [1, 2, 3, 4] of load-bearing structures of a full-size pedestrian bridge made of aluminum alloy 1915T. Taking into account the peculiarities of the construction, in order to avoid large strains of girders, it was decided to simulate loading as close as possible to a uniformly distributed load, which is used in the design of bridges. To solve this problem, 3 types of load distribution were designed and manufactured. Arrangement of strain gages The total number of strain gages was 240: 2 per each truss web, 2 per each panel of the top chord, 2 to 4 per each panel of the bottom chord (figure 3)
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