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MOMENT AREA METHOD

MOMENT AREA METHOD OF STRUCTURAL ANALYSIS: Theorem – I The change in slope between tangents drawn to the elastic curve at any two points A and B is equal to the product of

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PRESTRESSED CONCRETE- MERITS AND DEMERITS

Prestressed concrete has the following merits:Since the technique of prestressing eliminates cracking of concrete under all stage of loading, the entire section of the structures takes part in resisting the external load. In contrast to this, in the reinforced concrete, ...

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PRESTRESSING SYSTEMS AND ANCHORAGES

In concrete structures, prestress is introduced by stretching steel wire and anchoring them against concrete. Therefore, the prestressing systems should comprise essentially a method of stretching the steel and a method of anchoring it to the concrete. Different systems are ...

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PRE-TENSIONING AND POST-TENSIONING

PRE-TENSIONING AND POST-TENSIONING IN PRESTRESSED CONCRETE DESIGN The prestress in a structure is influenced by either of the two processes:Pre-tensioning, and Post-tensioningPre-tensioning can be further classified into two categories:Linear pre-tensioning Circular pre-tensioningPRE-TENSIONING Pre-tensioning is accomplished by stressing wires or strands, ...

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LOSSESS IN PRESTRESS OF PRESTRESSED CONCRETE

LOSSESS IN PRESTRESS OF PRESTRESSED CONCRETE The force which is used to stretch the wire to the required length must be available all the time as prestressing force if the steel is to be prevented from contracting. Contraction of steel wire ...

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DESIGN OF RAFT FOUNDATION

DESIGN OF RAFT FOUNDATION Design Considerations: If the loads transmitted by the columns in a structure are so heavy or the allowable soil pressure so small that individual footings would cover more than about one-half of the area, it may be better ...

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CENTER OF MASS – CENTER OF GRAVITY

Center of mass The center of mass of a system of particles is a specific point at which, for many purposes, the system’s mass behaves as if it were concentrated. The center of mass is a function only of the positions ...

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MOMENT OF INERTIA CALCULATION FORMULA

What is Moment of Inertia? Moment of inertia, also called mass moment of inertia or the angular mass, (SI units kg m2) is a measure of an object’s resistance to changes in its rotation rate. It is the rotational analog of ...

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SEISMIC DESIGN PHILOSOPHY FOR BUILDINGS

The Earthquake Problem Severity of ground shaking at a given location during an earthquake can be minor, moderate and strong. Relatively speaking, minor shaking occurs frequently, moderate shaking occasionally and strong shaking rarely. For instance, on average annually about 800 ...

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ARCHITECTURAL FEATURES & EARTHQUAKE

Importance of Architectural Features The behaviour of a building during earthquakes depends critically on its overall shape, size and geometry, in addition to how the earthquake forces are carried to the ground. Hence, at the planning stage itself, architects and structural ...

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