Abstract

The existing buildings can be improved under the seismic effect by adding rubber to the bolts in the connection. The buildings when maintenance work is happening there is a problem many times and it should be evacuated and requires high cost. This study aims to maintain the building without having to remove it and at a very low cost compared to other methods. This study includes six models divided into two groups. The two groups differ in terms of the number of bolts in the contact area between the column and the beam in the steel frame. The first group models contain four bolts in the connection area and the second group forms contain five bolts in the contact area. Each group includes three models representing the first form of a reference model that has not rubber material around the bolts in the connection area, the second model contains 150% rubber than a bolt diameter around one bolt of the connection area, and all the bolts in the connection area in the third model are warped with rubber. The presence of rubber around one bolt gave a load, displacement, drifting, damping ratio, ductility index energy dissipation close to models where all contact bolts are warped with rubber material

Highlights

  • The action applied to a structure by an earthquake is a ground movement with vertical and horizontal components

  • In this study, the rubber was applied to the bolt shank to form a high strength boltrubber connection (HSBR) which has the advantages of cost-effective, fast, and easy installation compared to conventional energy dissipation methods which are promising to enhance the ductility of the steel beam-column joints

  • It was found that the ductility of the model that contains one rubber-coated bolt in the case of the 4 bolts is not very different from the model that contains 4bolts coating with rubber, but in the case of the 5 bolts, the ductility of the model that contains 5 rubber-coated bolts is higher than the model that contains one bolt is rubber-coated due to the increase in the displacement of the model in the case of the 5 bolts wrapping and this leads to an increase in the drift and an increase in ductility

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Summary

Introduction

The action applied to a structure by an earthquake is a ground movement with vertical and horizontal components. In this study, the rubber was applied to the bolt shank to form a high strength boltrubber connection (HSBR) which has the advantages of cost-effective, fast, and easy installation compared to conventional energy dissipation methods which are promising to enhance the ductility of the steel beam-column joints. This study aims to maintain the building without the need for its entirety and providing time, effort, and further cost than if all bolts are packed with rubber for dissipation loads of seismic impact In this part validation is made for a set of models that are related to the study (suhab2020), this study includes three models that have been practically applied under horizontal quasistatic cyclic load.

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