A long service life is considered synonymous with durability. Since durability under one set of conditions does not necessarily mean durability under another, it is customary to include a general reference to the environment when defining durability. (more…)
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Suspension Bridges
The earliest suspension bridges were found in China, dating back to 206 B.C. Many of the earlier bridges were made from materials such as twisted grass. In the early 19th century, iron chains became a popular material for suspension bridges. ...
Post Tensioning Technique for Rehabilitation of Structures
Post Tensioning In Rehabilitation Of Structures Post tensioning has become very popular these days sensing the advantages it provides. Even small structures of G+2 are using post tensioning these days. The application of post tensioning has increased and it is ...
DESIGN FOR TERRORIST ATTACK FOR NEW CONSTRUCTION
Site planning – Physical layout and physical security aspects are to be considered. Surveillance is to be provided for avoid terrorist attack. By providing access controls and physical barriers. By restricted parking near the building Deep buried structures are safer. ...
ANALYSIS OF GRAVITY DAM
The stability of a dam can be analysed in the following steps: i. Consider unit length of the dam. ii. Work out the magnitude and dimensions of all the vertical forces acting on the dam and their algebraic sum, i.e. ...
Construction of Box Girder Bridges – Specifications, Uses, and Benefits
It is a bridge in which the main beams comprise girders in the shape of a hollow box (rectangular or trapezoidal shape). The box girder normally comprises either prestressed concrete, structural steel, or a composite of steel and reinforced concrete. ...
Classification of Steel Bridges Based on Traffic, Structure and Carriageway
Classification of steel bridges Steel bridges are classified according to the Type of traffic carried, type of main structural system and the position of carriageway relative to the main structural system. These classification of steel bridges are briefly discussed in ...
Plate Girder Bridges – Details and Design Requirements
Plate girders became popular in the late 1800’s, when they were used in construction of railroad bridges. The plates were joined together using angles and rivets to obtain plate girders of desired size. By 1950’s welded plate girders replaced riveted ...