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Seismic Base Isolation of Structures
Abstract Seismic design of structures has been one of the most important and interesting issues in the last century. Eventually, the fundamental frequency of conventional medium-rise buildings lies in the frequency range of earthquake that has maximum energy content. Consequently, these buildings attract maximum earthquake response due to resonance . The response of the building further amplifies with floor rise. This increases the stresses in the structural members and results in large interstorey drifts. This leads either to damage or loss of functionality of the various service components mounted on different floor levels. The ground acceleration expected during an earthquake has a great deal of uncertainty in its assessment. Moreover, the magnitudes of the forces during an earthquake are very large, and the use of more popular design in elastic range of material behavior results in very large sections of structural members which is uneconomical and sometimes impractical. Further, the low probability of occurrence of large earthquake events does not justify the use of elastic design and the practice of inelastic design has evolved for earthquake-resistant design . In conventional earthquake-resistant design , an attempt is made to arrest all the brittle mode of failure by introducing special detailing schemes that have been well established from experiments world over. These detailing schemes have been prescribed as ductile detailing procedures in various codes (IS-13920 in case of India).
Seismic Base Isolation of Structures
Abstract Seismic design of structures has been one of the most important and interesting issues in the last century. Eventually, the fundamental frequency of conventional medium-rise buildings lies in the frequency range of earthquake that has maximum energy content. Consequently, these buildings attract maximum earthquake response due to resonance . The response of the building further amplifies with floor rise. This increases the stresses in the structural members and results in large interstorey drifts. This leads either to damage or loss of functionality of the various service components mounted on different floor levels. The ground acceleration expected during an earthquake has a great deal of uncertainty in its assessment. Moreover, the magnitudes of the forces during an earthquake are very large, and the use of more popular design in elastic range of material behavior results in very large sections of structural members which is uneconomical and sometimes impractical. Further, the low probability of occurrence of large earthquake events does not justify the use of elastic design and the practice of inelastic design has evolved for earthquake-resistant design . In conventional earthquake-resistant design , an attempt is made to arrest all the brittle mode of failure by introducing special detailing schemes that have been well established from experiments world over. These detailing schemes have been prescribed as ductile detailing procedures in various codes (IS-13920 in case of India).
Seismic Base Isolation of Structures
Reddy, G. R. (author) / Nagender, T. (author) / Dubey, P. N. (author)
Textbook of Seismic Design ; 521-548
2019-01-01
28 pages
Article/Chapter (Book)
Electronic Resource
English
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