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Investigating the performance of bridges equipped with elastomeric bearings reinforced with fibre under traffic and seismic loads

Aghelfard Arian, Rohanimanesh Mohammad Sadegh, Vatanshenas Ali

Zeszyty Naukowe. Transport / Politechnika Śląska

2019

z. 104

5--14

The seismic elastomeric bearings reinforced with fibre is considered as a new technology in comparison to other conventional isolator systems in civil engineering. In this type of bearing, recycled fibres replaced traditional steel plates used in common bearings. Therefore, this type of bearing has been studied in recent years due to both environmental and cost-saving advantages. The shortage of references about the application of this type of bearing in the bridge industry, and particularly the continuous-span bridges, prompted the researchers in this study to investigate the performance of the isolated reinforced concrete box girder bridges with continuous spans. Reducing the acceleration transmission from the substructure to the superstructure is one of the main advantages of using seismic bearings. Based on the study of the structural models, it was found that, in most cases, elastomeric bearings reinforced with fibres showed a suitable performance and reduced the acceleration applied to the superstructure by absorbing the earthquake energy.

Evaluating main parameters effects of near-field earthquakes on the behavior of concrete structures with moment frame system

Jouneghani Kourosh Talebi, Hosseini Mahmood, Rohanimanesh Mohammad Sadegh, Dehkordi Morteza Raissi

Advances in Science and Technology. Research Journal

2018

Vol. 12, no 3

10--23

Amplitude and frequency content are two important features of earthquakes that are different for near and far-fault earthquakes and in most of the standards, the effects of near-field earthquakes in loading are not considered. Therefore, study and comparison of these effects on structures is necessary. In this paper, structural operation against near and far fault earthquakes for two near sites and two far sites is investigated. For this purpose and in order to achieve an operation point of a structural model with six staircases with a mean lateral bending frame resistant system seismic hazard information is analyzed with regards to special plan spectrums of 2 different sites using near and far faults. An evaluation of the effects due to near and far fault earthquakes based on the Iran’s standard 2800 ranges on operation point and the comparison of operation effects of near and far fault spectrums with Iran’s standard are results of this research work. After the presentation of results obtained from time history analyses, some suggestions are proposed for design correction based on the regulations in near -field earthquakes.