List of Articles Sayed Behzad Talaeitaba

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  1 - Combined Porcelain Ceramic and Recycled Concrete Aggregates Used as Replacement for Coarse Aggregates in Concrete
  Sayed Behzad Talaeitaba Maedeh Dehghani
  10.1007/ijase.2023.1972233.1061
  The increasing production of construction waste on the one hand and the use of concrete as a widely used material in the construction industry, on the other hand, has always led researchers to reuse construction waste in concrete. Among the recycled materials that can b More

  The increasing production of construction waste on the one hand and the use of concrete as a widely used material in the construction industry, on the other hand, has always led researchers to reuse construction waste in concrete. Among the recycled materials that can be used in concrete, we can mention porcelain ceramic and recycled concrete. In the present study, these two types of recycled aggregates (recycled porcelain ceramics and recycled concrete) alone and together in different percentages of 20%, 40%, and 60% are used as the replacement of coarse aggregates in concrete with a strength of more than 50 MPa and high flowability. Slump test, compressive and flexural strength, water absorption, and water penetration tests have been performed on 150 samples made in 10 mixing designs along with an SEM test. The results showed that all the mixing designs had slumps of more than 180 mm. The compressive strength of the control sample averaged 60 MPa and the samples containing recycled aggregates averaged 68 MPa. Also, by combining two types of recycled aggregates, both the 7-day and 28-day strength increased with increasing replacement percentage with a linear trend. The highest increase was 28% for porcelain aggregates and 17% for combined recycled aggregates. In addition, the water penetration rate in the samples containing the combined recycled aggregates showed a significant decrease compared to the control sample. In the SEM test, it was observed that the samples containing the combined aggregates had a thicker and denser matrix. Manuscript profile
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  2 - Investigating the Effect of Using Multistory Pipe Dampers and their Combination with Braces on Structure Performance
  Sated Behzad Talaeitaba Erafn Jalali
  10.1007/ijase.2022.692293
  Researchers have combined passive control systems of differing stiffness with each other to provide multistory passive control systems. Each system absorbs and dissipates the applied energy according to its stiffness. This study investigates the multistory control syste More

  Researchers have combined passive control systems of differing stiffness with each other to provide multistory passive control systems. Each system absorbs and dissipates the applied energy according to its stiffness. This study investigates the multistory control system with the modern pipe in pipe passive damper, and combining them with braces, which are able to change stiffness and absorb energy under various loads to reduce seismic structural vibrations. Their performance in 5, 10 and 15 story 3D steel structures on type 1, 2 and 3 soil was evaluated with nonlinear time history analysis and referred to as the structure’s seismic responses. Results showed that using a combination of dampers and braces in 5, 10 and 15 story steel structures can be a suitable substitute for traditional bracing systems. For example, using pipe in pipe dampers instead of dual structures in 5, 10 and 15 story structures on type 3 soil reduced base shear by 45%, 51%, and 55%, and roof acceleration by 39%, 35% and 50%. Compared to dual structures, a combination of dampers in lower stories and braces in higher stories on type 3 soil reduced base shear by 36%, 36% and 46%, and roof acceleration by 38%, 32% and 41% in the 5, 10 and 15 story structures. Manuscript profile
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  3 - Stiffness Reduction Factor of Flat; Beam-Column and Waffle Slabs under Lateral Load
  Sayed Behzad Talaeitaba behrang Nazari
  10.1007/ijase.2023.1973609.1064
  Providing adequate strength and stiffness is considered a primary principle for structural design. Roof flexural members have a remarkable role to provide lateral and gravity stiffness. A vital issue in the analysis and stiffness assessment is to apply stiffness modific More

  Providing adequate strength and stiffness is considered a primary principle for structural design. Roof flexural members have a remarkable role to provide lateral and gravity stiffness. A vital issue in the analysis and stiffness assessment is to apply stiffness modification factor for the mentioned members in RC structures so that their impact in gravity and lateral load bearing could be changed. In the present study, to achieve an appropriate coefficient to decrease the stiffness of reinforced concrete slabs under simultaneous gravity and lateral loading, 20 structures from 2 to 20-stories with various roofs including flat slab, beam-column slab, and one-way and two-way waffle slabs were designed and analyzed, and then an equivalent overall coefficient for slabs stiffness decrease was obtained. The results indicate that the coefficient of 0.25 recommended by the building codes for flat slabs is around 60 percent conservative. In other categories of slabs for which the available building codes have not recommended a determined coefficient, the coefficient of 0.45 to 0.5 is achieved based on the analysis of the current study. Manuscript profile