The components are subjected to forces, which are not static, but vary in magnitude with respect to time. The stresses induced due to such forces are called Fluctuating Stresses. The most popular model for stress–time relationship is the sine curve.
ACI Design for Flucture Read More »
Transverse reinforcement in beams is provided mainly to resist the shear forces or forces which act in a direction perpendicular to the longitudinal direction of reinforced concrete beams. … In a reinforced concrete structure both steel and concrete take part actively in resisting the shear force.
TRANSVERSE RFT. FOR SOLID SEC.SUBJECT TO Vu&Tu Read More »
Reinforced concrete (RC), also called reinforced cement concrete (RCC), is a composite material in which concrete’s relatively low tensile strength and ductility are compensated for by the inclusion of reinforcement having higher tensile strength or ductility.
Design of RC Sections (According to ACI 2005) (By PMS, Cairo, Egypt) Read More »
Reinforced concrete (RC), also called reinforced cement concrete (RCC), is a composite material in which concrete’s relatively low tensile strength and ductility are compensated for by the inclusion of reinforcement having higher tensile strength or ductility.
Design of RC Sections (According to ACI 2002) (By PMS, Cairo, Egypt) Read More »
Punching shear is a type of failure of reinforced concrete slabs subjected to high localized forces. In flat slab structures this occurs at column support points. The failure is due to shear. This type of failure is catastrophic because no visible signs are shown prior to failure.
DESIGN SLABS FOR PUNCHING SHEAR AT INTERNAL SQUARE COLUMNS Read More »
The bending moment at a section through a structural element may be defined as the sum of the moments about that section of all external forces acting to one side of that section.
DESIGN OF SECTIONS UNDER BENDING MOMENT Read More »
Wind pressure is given by the equation P = 0.00256 x V2, where V is the speed of the wind in miles per hour (mph). The unit for wind pressure is pounds per square foot (psf). For example, if the wind speed is 70 mph, the wind pressure is 0.00256 x 702 = 12.5 psf.
Wind Intensity Calculation Read More »
Tower Bolt is a rod-shaped bolt for fastening a door or the like, attached to one side of the door at the edge and sliding into a cylindrical casing on the frame of the opening. These may be ferrous or non-ferrous.
Tower Bolt Connection Design Read More »
Calculate the filled volume of a horizontal cylinder tank by first finding the area, A, of a circular segment and multiplying it by the length, l. Area of the circular segment, the grey shaded area, is A = (1/2)r2(θ – sinθ) where θ = 2*arccos(m/r) and θ is in radians.
TANK DESIGN CALCULATIONS Read More »
A reinforced concrete slab is a crucial structural element and is used to provide flat surfaces(floors and ceilings) in buildings. On the basis of reinforcement provided, beam support, and the ratio of the spans, slabs are generally classified into one-way slab and two-way slab.
Slab reinforcement using SAP output Read More »
Design load for formwork are dead load plus live load per square metre of form contact area. The dead load is defined as the weight of the reinforced concrete plus the weight of the formwork.
Design Load on Formwork Read More »
The AASHTO LRFD Bridge Design Specifications are intended for use in the design, evaluation, and rehabilitation of bridges. The specifications employ the Load and Resistance Factor Design (LRFD) methodology, using factors developed from current statistical knowledge of loads and structural performance
AASHTO-LRFD 2004 – CONCRETE SLAB & WALL DESIGN Read More »
Thickness of concrete slab depends on loads and size of the slab. In general, 6 inch (150mm) slab thickness is considered for residential and commercial buildings with reinforcement details as per design. Methods used for finding slab thickness varies for different types of slabs.
Slab depth determination from serviceability limit Read More »
An isolated footing is one of the most used types of foundation to support single-columns when they are arranged at a long distance. An isolated footing must be designed to avoid exceeding its bearing capacity and provide safety against overturning or sliding while preventing the ground from settling.
Isolated Foundation Calculation (ACI 318M-95) Read More »
Footings are an important part of foundation construction. They are typically made of concrete with rebar reinforcement that has been poured into an excavated trench. The purpose of footings is to support the foundation and prevent settling. Footings are especially important in areas with troublesome soils.
FOOTING DESIGN PROGRAMME USING LIMIT STATE METHOD Read More »
“FOOTINGS” is a spreadsheet program written in MS-Excel for the purpose of analysis of rigid rectangularspread footings with up to 8 total piers, and for either uniaxial or biaxial resultant eccentricities. Overturningsliding, and uplift stability checks are made when applicable, and resulting gross soil bearing pressures atthe four (4) corners of the footing are calculated.
DESIGN OF RECTANGULAR SPREAD FOOTING Read More »
