A rectangular beam has b = 350 mm and d = 430 mm with concrete compressive strength f’c = 30 MPa and steel yield strength fy = 345 Mpa. If compression steel area is required, it will be placed 70 mm from its cg up to extreme fiber. Calculate the following: a) Required steel area if the beam is subjected to dead load moment of 30 kN-m and live load moment of 25 kN-m b) If the beam has 5-16 mm diameter rebars, determine if it is compression-controlled, transition or tension-controlled. c) Required tension steel area at factored moment of 400 kN-m.

Q: A simply supported rectangular beam has a width of 300mm and the distance to the centroid of…

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Q: simply supported rectangular beam has a width of 300mm and the distance to the centroid of tension…

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Q: A. Calculate the stress in the concrete at the top and bottom extreme fibers under a positive…

A: From the given problem, Positive Bending moment = 78kip f'c = 3200psi span  =26ft

Q: Item 5 Column AB is made from high strength pre-cast concrete and reinforced with four in. diameter…

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Q: A 150mm thick concrete slab, with a span of m, which is continuous on one end, is reinforced with…

A: Given data: Thickness of slab=150 mm Span of the beam=3m Reinforcement =15 M bars  Spacing between…

Q: An HSS9 x 7 x3⁄8 filled with concrete is used as a composite column, as shown in Figure. The steel…

A: Pu=1.2PD+1.6PL Here PD=65 Ksi PL=130 Ksi Pu=1.2(65)+1.6(130)=286 Kips

Q: If the compressive strength of the concrete is 4 ksi and the yield strength of steel is 60 ksi, the…

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Q: Concrete strength in the estimating process is important for: Pricing labour Determining the time to…

A: Concrete strength in the estimating process is important for: Determining the time to remove…

Q: How much is the strike separation (i.e., line AB on the map)? Scale: 18mm = 100m 82m 181m 67m 24m O…

A: AB = 32 mm

Bars

In civil engineering, bars refer to steel reinforcement bars or rebars. These are structural members primarily used for reinforcement purposes in masonry works. A bar is characterized by its cross-sectional area, which is negligible compared to its length. Bars are usually manufactured by steel which is uniform throughout the length, or by meshing multiple steel wires. Other materials of the bar include carbon steel, glass fiber, carbon fiber, and basalt fiber. The reinforcing bars are coated with epoxy resins and other materials to enhance some of their properties including corrosion resistance.