Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Numerical Modeling of Retrofitted Structures
It is well known fact that masonry structures suffers extensive loss during earthquakes, leading to notable damage of lives. Majority of structures in India are Un-Reinforced masonry (URM) which are not strong and vulnerable under moderate earthquakes. Masonry construction remains vulnerable to seismic force due to many reasons like lack of integral action between brick and mortar, low shear strength of masonry, heavy mass and varying construction practices. Therefore, it is essential to increase seismic resistance of masonry structures utilizing dissimilar retrofitting measures. Past earthquakes in India and other countries reveals low seismic resistance of URM structure and extensive damage caused. Reconstruction of damaged structure may be very costly and time consuming therefore retrofitting is the best alternative to enhance the seismic performance of damaged structures. Many conventional and non-conventional techniques like, using ferrocement, shotcrete, steel elements application, grout injection, FRP, post-tensioning are available around the world for restoring the structures. This paper provides analytical work and finite element simulation of unreinforced masonry dome retrofitted using carbon fiber reinforced polymer (CFRP) or steel plate jacketing. The behavior of retrofitted structure is studied numerically. Dome structure have been analysed using commercial software SAP 2000. The structures have been analysed for gravity and earthquake loadings. Dome models have been analysed numerically using the time history data of 1999 Kocaeli earthquake while R.C. C frame is analysed by response spectrum method. Dome structure is retrofitted using steel plates and CFRP at the support level as well as tension zone. Analysis reveals that shell stresses are significantly reduced which may range from 10 percent to even 50 percent depending upon arrangement of retrofitting material for dome structure. Stress reduction can be observed significantly at the support level of the dome models.
Numerical Modeling of Retrofitted Structures
It is well known fact that masonry structures suffers extensive loss during earthquakes, leading to notable damage of lives. Majority of structures in India are Un-Reinforced masonry (URM) which are not strong and vulnerable under moderate earthquakes. Masonry construction remains vulnerable to seismic force due to many reasons like lack of integral action between brick and mortar, low shear strength of masonry, heavy mass and varying construction practices. Therefore, it is essential to increase seismic resistance of masonry structures utilizing dissimilar retrofitting measures. Past earthquakes in India and other countries reveals low seismic resistance of URM structure and extensive damage caused. Reconstruction of damaged structure may be very costly and time consuming therefore retrofitting is the best alternative to enhance the seismic performance of damaged structures. Many conventional and non-conventional techniques like, using ferrocement, shotcrete, steel elements application, grout injection, FRP, post-tensioning are available around the world for restoring the structures. This paper provides analytical work and finite element simulation of unreinforced masonry dome retrofitted using carbon fiber reinforced polymer (CFRP) or steel plate jacketing. The behavior of retrofitted structure is studied numerically. Dome structure have been analysed using commercial software SAP 2000. The structures have been analysed for gravity and earthquake loadings. Dome models have been analysed numerically using the time history data of 1999 Kocaeli earthquake while R.C. C frame is analysed by response spectrum method. Dome structure is retrofitted using steel plates and CFRP at the support level as well as tension zone. Analysis reveals that shell stresses are significantly reduced which may range from 10 percent to even 50 percent depending upon arrangement of retrofitting material for dome structure. Stress reduction can be observed significantly at the support level of the dome models.
Numerical Modeling of Retrofitted Structures
Gupta, Tushar (Autor:in) / Dubey, Kajal (Autor:in) / Panwar, Gaurav (Autor:in) / Singh, Sneha (Autor:in)
01.06.2020
417726 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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