METHODS OF BRIDGE CONSTRUCTION: Before a bridge can be built an appropriate method of construction must be chosen. The decision is made by the design team. The principle factors considered by the design team when chosing a suitable method of construction are given below: The scale of the bridge The obstacles to be crossed The(…)
Bridges
ADVANTAGE OF CONTINUOUS OVER SIMPLY SUPPORTED MULTI-SPAN DECK
Advantages of continuous multiple-span deck over simply supported multiple-span deck Movement joints are normally added to bridge structures to accommodate movements due to dimensional changes arising from temperature variation, shrinkage, creep and effect of prestress. However, the provision of excessive movement joints should be avoided in design because movement joints always encounter problems giving rise(…)
INSPECTION OF A BRIDGE STRUCTURE
INSPECTION OF A BRIDGE STRUCTURE: Once a bridge is opened for use, management begins and carries on for the life of the bridge. Hence, the bridge must be regularly inspected and maintained for the benefit of its users. There are three levels of inspection: 1. General inspection: Usual inspection of representative parts of a structure.(…)
Astounding Japanese Highways, Bridges & Interchanges
Japan saw most of its infrastructure bombed back to the stone age in the final years of World War II, which makes the country’s post-war rejuvenation all the more astounding. Huge, complex public works projects saw a concrete & steel web of highways, bridges and interchanges blossom from the wreckage of war. Today, shaped by(…)
TEN LONGEST BRIDGES IN THE WORLD
Here is a list of the ten longest bridges in the world with pictures and descriptions. Those beautiful photos are showing to us that there are no borders and everything is reachable. 10. Seven Mile Bridge The Seven Mile Bridge, in the Florida Keys, runs over a channel between the Gulf of Mexico and the(…)
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. The Basic Components Two towers The catenary system A ground anchor A level truss stiffened(…)
STEPS IN ANALYSING A BRIDGE
STEPS IN ANALYSING A BRIDGE The analytical process for structure of bridges can be broken down to six main steps: Idealise the structure Form a model Idealise the loading in a form suitable for the model Solve the resulting equation Interpret the idealized results Check these results so that they comply with initial assumptions and(…)
CAST-IN-SITU METHOD OF BRIDGE CONSTRUCTION
Cast-in-situ Method of Bridge Construction: Cast-in-situ method of construction of bridges is a flexible method in which the demands of more unusual geometrical shapes can be easily coped with. This method is commonly used for short span bridges for the cost effective construction of solid, voided or ribbed reinforced concrete slab bridges. Each bridge type(…)