Abstract
The method of the assessment of steel structures mechanical properties is considered with the nondestructive test by conical indentation. The nondestructive evaluating of the steel mechanical properties in real structures is widely spread in many applied problems. Dynamic indentation method is one of the most effective because of compatibility and accuracy. For this purpose, the static and dynamic problem of axisymmetric elastic-plastic truncated cone indentation is solved, and the results are compared with finite element analysis and experimental data. The method of nondestructive evaluating of mechanical characteristics is suggested and devise of the realization of the method is tested at real structures. The method is tested on steel railway bridges that are being operated for more than 60 years. As a result, zones with lower strength values were identified, and recommendations for strengthening the design were given.
Highlights
One of the main goals in civil engineering is to improve the quality of buildings and structures, and to ensure their reliability
The most important structural elements are undergone by complex processing, after which the properties of the material vary greatly, and their values need to be known at the design, manufacturing and operation stages
In [10] we introduced a device for mechanical properties (MP) assessment by impact conical indentation
Summary
One of the main goals in civil engineering is to improve the quality of buildings and structures, and to ensure their reliability. Evaluation of mechanical properties of metal structures for various purposes is one of the most important instruments at any stage of their design and operation. The properties of materials change under the circumstances, and the further changing must be thoroughly monitored directly on the structure at all stages of the product life cycle: design, manufacture and operation.
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