فهرست مطالب moslem yousefvand

Structural engineers are generally aware of the intrinsic safety properties of concrete exposed to fire (non-flammability at high temperatures). However, the tendency of concrete for spalling at high temperatures is a significant defect, and recently many researchers have conducted studies on this issue. One of the primary objectives of this study is to assess the shear strength and modulus of rupture of concrete reinforced with different percentages of modified polyolefin synthetic fibers at different temperatures and to compare the results with the preliminary design. The other objective of the present study is to compare the behaviors of synthetic fiber concrete under the effect of the furnace temperature and direct fire. After adding fibers (1.5 volumetric percentage), a 29% increase in the tensile strength and a 56% increase in the modulus of rupture (the stress corresponding to the development of the first crack) were observed. Considering the fiber concrete results in the experimental temperature condition, it can put on an acceptable strength performance. However, at temperatures equal to or greater than 400 , the fibers lose their role in compensating the low tensile strength of concrete due to oxidation, causing porosity in the concrete and reducing its strength.

The aim of this study was to determine the effectiveness of therapy quality of life to change psychological resilience and Self-determination school students of Khorramabad girl was depressed. This quasi- experimental study in which the pretest- posttest control group was used. The sample consisted of 40 subjects that depression among female high school students of Khorramabad were selected and randomly assigned to experimental groups (health, quality of life and control were handled. Intervention in the experimental group for 8 sessions of 2 hours of quality of life were treatment. The data were collected from questionnaires Self-determination and psychological resilience in the pre-test and post-test for both test and control groups were used. Data were analyzed using multivariate analysis of covariance (MANCOVA) was performed. Covariance analysis showed significant differences between the two groups. Results showed that quality of life therapy is effective in increasing Self-determination and psychological resiliency of the school.

The aim of this study was to determine the effectiveness of therapy quality of life to change psychological resilience and Self-determination school students of Khorramabad girl was depressed. This quasi-experimental study in which the pretest - posttest control group was used. The sample consisted of 40 subjects that depression among female high school students of Khorramabad were selected and randomly assigned to experimental groups (health, quality of life and control were handled. Intervention in the experimental group for 8 sessions of 2 hours of quality of life were treatment. The data were collected from questionnaires Self-determination and psychological resilience in the pre-test and post-test for both test and control groups were used. Data were analyzed using multivariate analysis of covariance (MANCOVA) was performed. Covariance analysis showed significant differences between the two groups. Results showed that quality of life therapy is effective in increasing Self-determination and psychological resiliency of the school.