جستجوی مقالات مرتبط با کلیدواژه « retrofitting » در نشریات گروه « میان رشته ای »

One of the newest fields of study in the field of structural and earthquake engineering is the achievement of structural systems that quickly return to their pre-earthquake state and service after an earthquake. One of the newest of these systems is the Linked Column Frame (LCF) system, which protects the vertical load-bearing system during earthquakes by having the replaceable link beam members as a fuse member. The relative low cost and easy repair process in these systems lead to the rapid return to occupancy after an earthquake. In this system, the replaceable link beams used initially provide the initial rigidity of the system and then exhibit soft nonlinear behavior and ductility with energy dissipation resulting from the yield. In this paper, the behavior of the linked column frame system for retrofitting of the RC frames in two structures of 5- and 10-storeys were investigated. Based on the results of the nonlinear static analysis of the two 5- and 10-storey reinforced concrete structures retrofitted with LCF system, the amount of bearing capacity and the energy dissipation capacity of the structure retrofitted increased by an average of 3.1 times compared to the structures without retrofitting. The plastic hinges were first formed in steel frames (LC frames) and the RC structure remained in an elastic state. Furthermore, the maximum and minimum shear absorption of seismic force percentage of the LC frames were approximately 80% and 13% in the lower and upper storeys, respectively.

Iran is a land of seven thousand years old civilization, one of the oldest civilizations of the ancient world, because of its rich cultural and artistic history, there are many monuments, most of which are in high seismic danger areas. Bam Citadel was built in the 5th century BC and covers an area of 180,000 square meters was located on the Silk Road, one of the world's largest adobe structures. The superstructure and valuable damaged during the earthquake and unfortunately it was destroyed more than 80 percent. In other words, one of the lessons that can be learned from the Bam earthquake is that the historic adobe structures are extremely vulnerable. Therefore, due to its rich history and rich artistic heritage including architecture, masonry and pottery, the need to preserve remains of the past is felt more and more. In this article, after highlighting the importance and necessity of preserving historic adobe structures, their architectural features are discussed. The next step will be discussed the seismic performance of historic adobe structures and methods of the seismic retrofit and restoration of them investigated. Finally, studies on the retrofitting and restoration of adobe structures will be reviewed.