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Flexural Stresses, Flexural Formula, Definition

Forces that are acting perpendicular to the longitudinal axis of the beam cause bending stresses which are termed as flexural stresses, beside flexural stresses beams also undergo shear stresses and normal stresses. We know from the basic concepts of internal forces in the beams that whenever some load either dead load, live load, imposed load, superimposed load or whatever is applied, it…
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Types of Concrete

Concrete is one of the widest used construction material whether it is a dam or a house or a bridge or flyover. Concrete is basically of three components water, aggregate and cement. Aggregate acts as a filling agent while cement mostly Portland cement act as a binding…
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Mass Transit System - Impacts, Advantages and Disadvantages

Mass transportation is any kind of transportation system in which large numbers of people are carried within a single vehicle or combination of vehicles. Airplanes, railways, buses, trolleys, light rail systems, and subways are examples of mass transportation systems. The term mass transit is commonly used as a synonym for mass transportation. Mass transit system refers to public shared…
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The Palm Islands Dubai

Construction on the palm islands began in 2001. Divers surveyed the seabed and worke­rs constructed a crescent-shaped breakwater from blasted mountain rock. The Crescent of Palm Jumeirah stands a little more than 13 feet above low tide sea level and sits in 34 feet of water…
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World\'s Longest and highest Glass Bridge in China

CHANGSHA, June 27 (Xinhua) — A 2-tonne truck was driven onto the world\’s longest and highest glass bridge in Zhangjiajie, Hunan Province in central China, on Sunday in a safety test ahead of its slated opening in July. The 430-meter bridge tucked between two steep cliffs is 300 meters above the ground. To further convince the public of the bridge\’s sturdiness, 20…
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how should the guided bearings in piers of the curved region be oriented with respect to the fixed bearing in abutment?

To determine the orientation of guided bearings, one should understand the movement of curved region of a prestressed bridge. Movement of prestress and creep are tangential to the curvature of the bridge (or along longitudinal axis) while the movement due to temperature and shrinkage effects are in a direction towards the fixed pier. If the direction of guided bearings is aligned towards the fixed…
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What is the advantage of sliding bearings over roller bearings?

In roller bearing for a given movement the roller bearing exhibit a change in pressure centre from its original position by one-half of its movement based on David J. Lee.  However, with sliding bearing a sliding plate is attached to the upper superstructure and the moving part of bearing element is built in the substructure. It follows that there is no change in pressure center after the…
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In the design of a simply supported skew bridge, which direction of reinforcement should be provided?

In the conventional design of steel reinforcement for a simply supported skew bridge, a set of reinforcement is usually placed parallel to free edge while the other set is designed parallel to the fixed edge. However, this kind of arrangement is not the most efficient way of placing the reinforcement. The reason is that in some parts of the bridge, the moment of resistance is provided by an obtuse…
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