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The Constructor - Civil Engineering Home for Civil Engineers

The Constructor - Civil Engineering Home provides informational resources to Civil Engineers in United States of America, India, United Kingdom, Australia and around the world on various subjects such as construction management, Structural Engineering, Building Construction Tips, How to Guides for Civil Engineers etc.

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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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CONSOLIDATION TEST OF SOIL

TO DETERMINE THE CONSOLIDATION CHARACTERISTICS OF A SOIL SAMPLE Theory: Consolidation of a saturated soil occurs due to expulsion of water under static, sustained load. The consolidation characteristics of soils are required to predict the magnitude and the rate of settlement. The ...

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VARIABLE HEAD PERMEABILITY TEST OF SOIL

TO DETERMINE THE PERMEABILITY OF A SOIL SPECIMEN BY THE VARIABLE HEAD PERMEAMETER Theory: The variable head permeameter is used to measure the permeability of relatively less pervious soils. The coefficient of permeability is given by

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PERMEABILITY OF SOIL BY CONSTANT HEAD PERMEAMETER

TO DETERMINE PERMEABILITY OF SOIL BY CONSTANT HEAD PERMEAMETER. Theory: The coefficient of permeability is equal to the rate of flow of water through a unit cross section area under a unit hydraulic gradient. In the constant head permeameter, the head causing ...

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HOW BUILDINGS TWIST DURING EARTHQUAKES?

Why a Building Twists In your childhood, you must have sat on a rope swing – a wooden cradle tied with coir ropes to the sturdy branch of an old tree. The more modern versions of these swings can be seen ...

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