نتایج جستجو برای: ordinary steel
تعداد نتایج: 130370 فیلتر نتایج به سال:
In this paper, we investigate a model describing induction hardening of steel. The related system consists an energy balance, ordinary differential equation (ODE) for the different phases steel, and Maxwell’s equations in potential formulation. existence weak entropy solutions is shown by suitable regularization discretization technique. Moreover, prove weak-strong uniqueness these solutions, i...
حالت های مختلف آلیاژ حافظه دار شکلی در یک مهاربند پیشنهادی به منظور به دست آوردن رفتار بهینه استفاده شده اند. مهاربند پیشنهادی قابلیت استهلاک انرژی بالا در عین حال رفتار بازگردانندگی دارد. در این تحقیق ابتدا مقایسه بین قاب با مهاربندهای sma و قاب با مهاربندهای steel شده است، در نهایت جهت بدست آوردن حالت بهینه از ترکیب دو حالت بالا استفاده شده است که این امر سبب کسب خواص برتر هردو نوع مهاربند در...
cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...
This paper presents research on a new type of fabricated steel–wood composite floor material in the style slab-embedded beam flange, using test methods and finite element numerical analysis to study flexural load-bearing performance slabs. Through experimental phenomena, failure process mechanism are analyzed, deformation ultimate bearing capacity assessed. model, influence connection mode beam...
The durability of concrete structures can effectively be enhanced by using stainless steel rather than ordinary reinforcements under harsh service conditions. Because the basic mechanical properties and stress-strain relationship obviously differ from those reinforcements, current design codes for reinforced are not appropriate steel-reinforced concrete. On basis research works reported in past...
In this paper, the seismic collapse probability of special steel moment-resisting frame (SSMRF) structures under near fault pulse-like and far fault ordinary ground motions is evaluated through fragility analysis. For this purpose, five sample frames with 3 to 15 stories are designed and imposed to the ground motion excitations with different characteristics. Fragility curves are derived for th...
Vibration Performance of Steel Fiber Concrete Tunnel Lining by Adjacent Tunnel Blasting Construction
When constructing tunnels in mountainous areas, the drilling and blasting method is most commonly used because of its economy. Ordinary reinforced concrete itself has defects such as poor crack resistance brittleness. Therefore, when using for ordinary double-line tunnels, vibration phenomena will occur cause cracks first-line which have adverse effects on durability safety tunnel. As a respons...
Leca lightweight particles are used for structural and semi structural concrete in different countries. In Iran it is usually used as Mass lightweight concrete, blokes and partitions. In this research an experimental work carried out using Leca concrete to assess its physical and mechanical properties and possibility of constructing high strength lightweight concrete to use as structural elemen...
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