Abstract
In the paper, behaviour of a temporary steel grandstand equipped with two different types of bracing system has been analysed through the numerical study. A typical solution concerning application of a diagonal tubular members has been compared with elements proposed by authors and called polymer dampers. A polymer element consists of two L-shape steel members bonded with polymer mass. The aim of the paper is to verify the effectiveness of polymer dampers in reduction of vibrations of temporary metal grandstands subjected to dynamic loads induced by spectators. The results of the study show that the response of structure equipped with two analysed bracing systems is different variable. The application of the polymer dampers results in substantial reduction in structural vibrations. Moreover, the decrease in values of accelerations of the grandstand with polymer dampers allows to maintain comfort of spectators at an acceptable level.
Highlights
Dynamic loads are often considered the most important ones at the design stage of civil engineering structures [1]
Behaviour of a temporary steel grandstand equipped with two different types of bracing system has been analysed through the numerical study
The aim of the paper is to verify the effectiveness of polymer dampers in reduction of vibrations of temporary metal grandstands subjected to dynamic loads induced by spectators
Summary
Dynamic loads are often considered the most important ones at the design stage of civil engineering structures [1]. Designed and erected metal structures are often composed of very slender and light components that are more excitable by different types of dynamic load [2]. A typical solution concerning application of a diagonal tubular member has been compared with an element proposed by authors and called polymer damper. The applied polymer mass is a specially designed flexible two-component grout based on polyurethane resin [17, 18] This kind of material has been already used for filling of cracks in brick walls [19, 20]. The aim of the paper is to verify the effectiveness of polymer dampers in reduction of vibrations of temporary metal grandstands subjected to dynamic loads induced by spectators. The dynamic load has been assumed a series of synchronous repetitive impacts, as expressed by Fourier series (see [23])
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