Identification and Ranking factors affecting the lifespan of concrete buildings in Mashhad

Today, the emergence of the energy crisis and the resulting environmental problems have left many challenges by entering many activities in the field of architectural and urban design, which have a large share in energy consumption and environmental pollution. The present study was conducted with the aim of identifying and prioritizing the factors affecting the life of concrete buildings in the city of Mashhad. Based on the results of the analytic hierarchy process, it was determined that the factors affecting the lifespan of concrete buildings in Mashhad were technical factors, economic factors, managerial factors, natural and unnatural disasters, and building maintenance and care. In prioritizing the factors affecting the lifespan of concrete buildings in Mashhad using the analytic hierarchy process, the most important main criterion was the managerial criterion with a criterion weight of 0.214, and under the technical criterion, the lack of proper curing of concrete before and after concreting with a criterion weight of 0.182, under the economic criterion, the use of unskilled workers in concrete construction operations in terms of reducing costs with a criterion weight of 0.187, under the managerial criterion, the lack of supervision and control of the process of carrying out electrical and mechanical installations according to national building regulations with a criterion weight of 0.195, under the criterion of natural and unnatural disasters, leakage and dampness and unprincipled use of the building with a criterion weight of 0.198, and under the criterion of building maintenance and care, the lack of periodic services of building facilities such as elevators with a criterion weight of 0.21 as the most important factors in reducing the lifespan of concrete buildings. They were identified in the city of Mashhad.