حمزه دهقانی

The aim of this research is to select the optimal industrial building systems in the schools of Kerman province using the hierarchical analysis.
necessity: Industrialization of buildings as systematic method to improve the quality and speed of construction has been considered by construction policymakers. in recent years, industrialization is policies the School Renovation, Development and Equipping Organization.

Four main criteria and twenty sub-criteria were identified to evaluate industrial systems suitable for schools. According to the eleventh national building regulations, lightweight steel frame (LSF), prefabricated concrete buildings, reinforced concrete structural wall system with permanent insulation mold and three-dimensional prefabricated panel system have been used for evaluation. In this research, the hierarchical analysis process approach has been used in order to rank the effective factors in the optimal selection of industrial building systems in the schools of Kerman province.

the data analysis was done using the hierarchical method. The results show that LSF with a score of 0.303 is the most suitable option. the score of prefabricated concrete building system, three-dimensional style prefabricated panel system and reinforced concrete structural wall system with permanent insulation mold were obtained as 0.266, 0.22 and 0.21 respectively.

Four main criteria have been used in this research. The results obtained from the data analysis show that the criterion of practicability is the most important criterion with a relative weight of 0.427. according to quality and technical ability, cost and time with relative weights of 0.401, 0.106 and 0.067 were placed in next priorities.

In this study, hysteresis behavior and energy absorption rate of steel shear walls in reinforced sheets CFRP, GFRP and the effect of grooves with different patterns under cycling have analyzed using the finite element method. For this purpose, the accuracy of the responses obtained from the software is compared with the experimental model. Sensitivity analysis is then performed on the dimensions and types of elements used in the analysis. All models are subjected to cyclic loading in according with ATC-24 code. After simulating each of the models in the ABACUS, the results of analysis include shear capacity, energy absorption and the maximum of these parameters were evaluated during the analysis of the models and compared with each other. The best model also in two parts of reinforcement and groove, under four different earthquakes, behavior seismic has been studied. The results show that the reinforced polymer sheets on the shear wall have a direct effect on the seismic performance and the pattern of stress distribution is directly related to how grooves. Also among the models, the use of CFRP with horizontal alignment has the best seismic performance.Key words: Steel shear wall, Reinforced polymer sheets, Energy absorption, Hysteresis curve, Performance improvement

Concrete is the most widely made construction material in the structural engineering world. Advantages such as high compressive strength, availability of raw materials, and low preparation cost make concrete one of the most important used construction materials. Under harsh environmental conditions, aggressive agents such as sulfates and chlorides penetrate the concrete through these cracks to damage the concrete. While concrete cracks are not only expensive to repair, they are often hard to detect as well. It is now identified that the strength of concrete alone is not sufficient, the degree of harshness of the environmental condition to which concrete is exposed over its entire life is very important. Self-healing concrete is a type of concrete that has the ability to repair itself without the need for an external agent during cracking. Concrete containing microorganisms has self-healing properties. The self-healing agent contains a specific concentration of bacteria with a nutrient in the concrete that produces calcium carbonate while the water and environmental conditions are suitable for the concrete. In this research, four different specimens of concrete have been made. Concrete containing microorganisms is made in two different concentrations of bacterium bacillus pasteurization (107,109 cells/ml) and calcium lactate nutrients and is compared with concrete containing silica fume, concrete containing latex and control concrete. In all four specimens, the same mix design was used with a water/cement ratio of 0.48 and containing silica fume, latex polymer, and calcium lactate, which replaced cement in different percentages. Specimens were subjected to compressive, flexural, and tensile strength tests at 7 and 28 days of operation, and the results were compared. The results showed that the best performance among all specimens for concrete containing silica fume and self-repair agent (bacteria and brain material) increased compressive strength and reduced tensile and flexural strengths compared to the controlled specimens. The use of a self-healing agent in concrete increases the compressive strength of concrete, but this increase is not as great as the increase in silica fume. Bacteria with a higher concentration have a negative effect on the compressive strength of concrete so that more use of bacteria in concrete increases the compressive strength to such an extent that it even reduces the compressive strength compared to the concrete strength of the control specimens. The self-healing agent reduces the flexural and tensile strength of concrete, as opposed to silica fume but they are better than latex and produce better results.