Abstract
A base isolation system is a type of earthquake-resistant structure design approach based on the principle of reducing a structure’s earthquake response rather than increasing the structure’s earthquake resistance capacity. Seismic base isolated structures have the ability to make large displacements relative to the level of insulation elements. This means that a large structure performs very small displacements between floors during an earthquake and exhibits a rigid body behavior. At this point, the earthquake forces acting on the structure decrease along with the floors. In this article a school building composed of frame-shear wall is resolved primarily with the traditional fixed base structure system, mode shapes are found and periods are obtained. For earthquake response analysis, earthquake loads are distributed to the floors using the equivalent seismic load method and structural elements experiencing capacity problems are found. Then, using the earthquake record, larger failure of cross sections and capacity problems are obtained compared to the first method. In the second stage, the same structure is dissolved again by placing the lead core rubber base isolators between the base and the vertical structural members. The periods of structures under earthquake load have increased significantly by utilizing base isolation, as a result of that spectral accelerations decreased. Thus, large decreases in the shear forces acting to the structure are determined and failures of cross sections are removed.
Highlights
One of the areas of interest of building and geotechnical earthquake engineering is the examination of the extent of damage occurred due to loads caused by lateral effects such as earthquakes and winds, the developing of suggestions against destructive effects and sustaining the relationship between the ground and the structure
Base isolation is a kind of earthquake resistant structural design approach that focuses on the principle of reducing the response to earthquake rather than increasing the structure’s resistance
Nonlinear analysis is performed in time domain by using the data, including east-west and north-south directional components, recorded at 1999 Marmara earthquake in Duzce meteorology station. After these two analyses were completed, the base isolation is added to the fixed-base system, and the system is re-solved in the time domain and all three cases are compared
Summary
One of the areas of interest of building and geotechnical earthquake engineering is the examination of the extent of damage occurred due to loads caused by lateral effects such as earthquakes and winds, the developing of suggestions against destructive effects and sustaining the relationship between the ground and the structure. The strengthening of the bearing system, in order to provide a significant seismic performance, leads to a rather rigid behavior The choice of such a load-bearing system causes the structures to be subjected to more lateral forces and to shear loads. In this approach, the consumption of the seismic energy transferred through the structural ground is mainly due to the plastic hinges. A structure with a seismic isolation system can exhibit almost rigid superstructure behaviour in an earthquake motion as well as the flexibility needed to reduce floor accelerations with the isolation zone of large displacements. Natural rubber isolations have many advantages: Simple production Easy modelling Bearings mechanical behavior of is not affected by speed, temperature and aging over time [8]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Engineering, Technology & Applied Science Research
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
