Vahid Saberi; Hamid Saberi; Davood Sohrabi; Romina Nourian
Abstract
Passive control method, which is one of the solutions for strengthening and designing structures under earthquake loadings, has different sub-branches. One of these methods is to improve the existing weak buildings by using different types of damper. The seismic behaviour of the strengthened structure ...
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Passive control method, which is one of the solutions for strengthening and designing structures under earthquake loadings, has different sub-branches. One of these methods is to improve the existing weak buildings by using different types of damper. The seismic behaviour of the strengthened structure with different type of dampers is one of the main issues in choosing the strengthening method. Due to the energy absorption property, dampers have many applications in both construction and retrofitting. During an earthquake, these devices are activated and convert the earthquake input energy into heat energy, in other words, it absorbs the incoming energy. In previous studies, the use of this damper in various structures has been evaluated, but there is no specific category to investigate its effect on various types of steel structures in terms of height and type of damper. In this paper, the performance of this type of dampers in steel structures with different heights is discussed. The effect of using this type of dampers on the response of the structure such as the story drifts and the base shear is investigated and its performance is compared in steel structures with different heights. In the study of displacement, base shear and energy absorption parameters for three structures of 3, 6 and 12 floors, it was observed that viscous dampers had the best response to friction dampers and ADAS.
Seyed Saeid Tabatabaei; Seyed hamid moafi madani
Volume 1, Issue 3 , August 2019, , Pages 10-28
Abstract
Due to the complexity of loads applied to wharves and piers because of their special application as mooring and berthing structures, their design always has many challenges. These structures have a large mass, and the piles and pile caps connections must sustain large inelastic deformations during major ...
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Due to the complexity of loads applied to wharves and piers because of their special application as mooring and berthing structures, their design always has many challenges. These structures have a large mass, and the piles and pile caps connections must sustain large inelastic deformations during major earthquakes which force-based design method cannot consider properly. So this study was undertaken to evaluate the full seismic performance of a typical synchrolift wharf located at Hormozgan province with performance-based design method by a series of static pushover analyses for three different hazard levels in accordance with ASCE/COPRI 61-14 code requirements and local seismicity. Soil-structure interaction, material overstrength, and site-specific response spectra were used to determine the displacement demands. The results reveal that using conventional force-based design method leads to the unreliable deck as well as uneconomical pile foundation designs.
Seyed Saeid Tabatabaei; Seyed hamid Moafi Madani
Volume 1, Issue 2 , July 2019, , Pages 52-67
Abstract
It is realized that the economy of many littoral countries, including Iran, is dependent on the marine developments; therefore, the construction of port structures as the point of berthing, mooring, and repair of marine vessels has boomed in recent years. Hence, there has been significant research on ...
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It is realized that the economy of many littoral countries, including Iran, is dependent on the marine developments; therefore, the construction of port structures as the point of berthing, mooring, and repair of marine vessels has boomed in recent years. Hence, there has been significant research on the design of port and harbor structures, which leads to the development of performance-based design method as a highly reliable way for seismic design of these structures. Seismic actions may cause uncontrolled damages to wharves and piers, resulting in huge economic losses to the country. Iran is also one of the most seismically active zones and contrary to the seismic design of waterfront structures which still leaves much to the designer’s judgment, there are several published codes for performance-based design of building structures. So in this paper, the state-of-the-art ASCE/COPRI 61-14 code requirements on seismic design of wharves and piers has been studied along with the performance-based design method.
