The main purpose of this thesis is to see main differences and assumptions in designing various seismic isolation system (Lead Rubber Bearing, Friction Pendulum, etc.) for a specific building according to three national codes namely ASCE 7-16, TBDY2018 and EC8. Seismic Isolated structures has been increasing by number day by day in the whole world nevertheless, countries have different national codes and rules to design seismic isolators. Those codes and rules can affect the design of a seismic isolator system in a crucial way. For example, according to EC8 seismic isolators are designed according to a design earthquake level (in 50 years with %10 probability). On the other side, according to TBDY2018 and ASCE7-16 seismic isolators have to be designed for Maximum Credible Earthquake Level (in 50 years with %2 probability, MCE) and in addition to that for Design Earthquake Level (in 50 Years with %10 probability). Another difference can be addressed with bounding analysis, which means according to TBDY and ASCE 7-16 there should be upper and lower limit values for the seismic isolator characteristic parameters and whole analysis process should be done for both upper and lower limit values. However, according to EC8 there is no need for a bounding analysis as a requirement. All the reasons above mentioned, can show some of the differences in the design process of seismic isolation system. That’s why in this thesis all the main differences will be shown in an example design procedure for different seismic isolation systems for a real structure. During this process design spectrums will be determined according to above mentioned 3 codes then ground motions will be selected for those design spectrums. After selection of real Ground Motions, Non-Linear Time History Analysis will be conducted. In conclusion, the goal will be presenting the differences in results from different codes and see how the codes are affecting behavior of seismically isolated real structure.
The main purpose of this thesis is to see main differences and assumptions in designing various seismic isolation system (Lead Rubber Bearing, Friction Pendulum, etc.) for a specific building according to three national codes namely ASCE 7-16, TBDY2018 and EC8. Seismic Isolated structures has been increasing by number day by day in the whole world nevertheless, countries have different national codes and rules to design seismic isolators. Those codes and rules can affect the design of a seismic isolator system in a crucial way. For example, according to EC8 seismic isolators are designed according to a design earthquake level (in 50 years with %10 probability). On the other side, according to TBDY2018 and ASCE7-16 seismic isolators have to be designed for Maximum Credible Earthquake Level (in 50 years with %2 probability, MCE) and in addition to that for Design Earthquake Level (in 50 Years with %10 probability). Another difference can be addressed with bounding analysis, which means according to TBDY and ASCE 7-16 there should be upper and lower limit values for the seismic isolator characteristic parameters and whole analysis process should be done for both upper and lower limit values. However, according to EC8 there is no need for a bounding analysis as a requirement. All the reasons above mentioned, can show some of the differences in the design process of seismic isolation system. That’s why in this thesis all the main differences will be shown in an example design procedure for different seismic isolation systems for a real structure. During this process design spectrums will be determined according to above mentioned 3 codes then ground motions will be selected for those design spectrums. After selection of real Ground Motions, Non-Linear Time History Analysis will be conducted. In conclusion, the goal will be presenting the differences in results from different codes and see how the codes are affecting behavior of seismically isolated real structure.
Comparison and Evalution of the Efficiency of Different Types of Seismic Isolation Systems according to Different International Codes
OZCANLI, KERIM EFE
2020/2021
Abstract
The main purpose of this thesis is to see main differences and assumptions in designing various seismic isolation system (Lead Rubber Bearing, Friction Pendulum, etc.) for a specific building according to three national codes namely ASCE 7-16, TBDY2018 and EC8. Seismic Isolated structures has been increasing by number day by day in the whole world nevertheless, countries have different national codes and rules to design seismic isolators. Those codes and rules can affect the design of a seismic isolator system in a crucial way. For example, according to EC8 seismic isolators are designed according to a design earthquake level (in 50 years with %10 probability). On the other side, according to TBDY2018 and ASCE7-16 seismic isolators have to be designed for Maximum Credible Earthquake Level (in 50 years with %2 probability, MCE) and in addition to that for Design Earthquake Level (in 50 Years with %10 probability). Another difference can be addressed with bounding analysis, which means according to TBDY and ASCE 7-16 there should be upper and lower limit values for the seismic isolator characteristic parameters and whole analysis process should be done for both upper and lower limit values. However, according to EC8 there is no need for a bounding analysis as a requirement. All the reasons above mentioned, can show some of the differences in the design process of seismic isolation system. That’s why in this thesis all the main differences will be shown in an example design procedure for different seismic isolation systems for a real structure. During this process design spectrums will be determined according to above mentioned 3 codes then ground motions will be selected for those design spectrums. After selection of real Ground Motions, Non-Linear Time History Analysis will be conducted. In conclusion, the goal will be presenting the differences in results from different codes and see how the codes are affecting behavior of seismically isolated real structure.È consentito all'utente scaricare e condividere i documenti disponibili a testo pieno in UNITESI UNIPV nel rispetto della licenza Creative Commons del tipo CC BY NC ND.
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https://hdl.handle.net/20.500.14239/13804