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Individual and Combined Effects of Lead Rubber Bearing and Fluid Viscous Damper Techniques on Seismic Response of Irregular Reinforced Concrete Buildings

Dhanesh Shrikhande, Girish Joshi

Abstract


Most old structures that do not meet current seismic regulations may sustain significant damage or perhaps collapse as a result of an earthquake. The seismic enhancement could potentially help people survive a major earthquake. Since earthquake engineering began, not only in India but also in other nations, earthquake-resistant construction of reinforced concrete buildings has been a constant topic of research. Buildings are still being damaged as a result of earthquakes. Structures that have been built or that are planned to be built are vulnerable to future earthquakes. As a seismic protection system, the base isolation technique and energy dissipation technique are the best alternatives for mitigating the effects of sensitive earthquakes on the structure. This study compares the seismic behaviour of structures with a fixed base, structures with a fluid viscous damper (FVD), and structures with a base isolator or lead rubber bearing (LRB). The aforementioned structures are compared to an FVD + LRB combination in the study. Fixed base, FVDs, LRB isolators, and a combination of LRB and FVD are the four types of building frames that are evaluated. The structure is investigated using a time-history method. The irregular reinforced concrete structures of G+10 and G+20 storeys are considered. ETABS 18 is used to model the structure. Seismic zone III is suspected, with hard soil conditions.

Keywords: Base isolated structure, time-history method, fluid viscous damper, lead rubber bearing, ETABS 18


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