According to the Mehr News Agency, the use of new materials, especially composites instead of steel, has been highly sought after in recent decades to stylize and rebuild structures against earthquakes. have been. Composites consist of a binder (epoxy) and a suitable amount of fiber. These fibers may be of carbon, glass or aramid type, and the composite produced with these materials is referred to as FRP-GFRP-CFRP, respectively.
The most important advantage of composites is their excellent resistance to corrosion and tensile strength of up to 10 times the steel, but these materials are not environmentally friendly, while adjacent to objects Also cut and reduce the resistance of the structure. In this regard, the country’s researchers presented a kind of environmentally friendly polymer to retrofit buildings.
Dr. Seyyed Mahmoud Fatemi Aqda added that while 50 to 60 percent of residential buildings in the city of Seyran The earthquake is vulnerable.
Head of the Research Center for Roads, Housing and Urban Development, conducted a research and applied regulations for assessing the seismicity of buildings, including the activities of the center, and stated that In this regard, in order to retrofit buildings, it was tried to provide inexpensive, easy and inexpensive, easy-to-use, cost-effective methods for the public to operate.
He mentioned the production of a kind of polymer, including the achievements of the center in the field of building retrofitting, and noted: With the research conducted at the center, he succeeded in inventing the substance We have a special polymer to be physically fitted with a flexural, tensile and shear strength.
Fatemi referred to the results of tests on this polymer material and explained in this regard: In these tests, the polymer material produced on the elements of the building and In two buildings, it was applied to all its parts.
The head of the Research Center for Roads, Housing and Urban Development continued. Using the simulator table on these structures, Iran and the world’s most severe earthquakes and also sinusoidal waves The artificial one was applied to the building by a simulator table, which, although it caused fractures in the structures, did not collapse after standing up the table and stopping the earthquake of the building.
He said that cheap, affordable inside the country and the lack of expertise in applying the structures to the properties of this polymer, said: in addition to This supplied polymer is environmentally friendly and non-toxic.
Fatemi emphasized that this material emphasized advantages over FRP material for retrofitting: unlike this polymeric material, FRP requires specialized expertise, while FRP does not have complete ductility and can be cut and broken in dealing with sharp objects, and the possibility of producing it within the country is not needed.
He emphasized that the manufactured polymer material could be used in residential buildings, hospitals and educational centers and historic structures, with a thorough coverage of this The polymer acts from the inside and outside of the building and causes the structure to be retrofitted.
