What is the consideration in selecting the orientation of wing walls in the design of bridge abutments?
There are three common arrangements of wing walls in bridge abutments based on Dr. Edmund C Hambly (1979): (i) Wing […]
Questions and Answers
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
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What are the major problems in using pumping for concreting works?
In pumping operation, the force exerted by pumps must overcome the friction between concrete and the pumping pipes, the weight
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What is preset during installation of bridge bearings?
Preset is a method to reduce the size of upper plates of sliding bearings in order to save the material
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What are the shortcomings of grillage analysis which is commonly used in structural analysis of bridges?
Grillage analysis suffers from the following shortcomings based on E. C. Hambly: (i) For coarse mesh, torques may not be
What are the functions of grout inside tendon ducts?
Grout in prestressing works serves the following purposes: (i) Protect the tendon against corrosion. (ii) Improve the ultimate capacity of
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What are the three major types of reinforcement used in prestressing?
(i) Spalling reinforcement Spalling stresses are established behind the loaded area of anchor blocks and this causes breaking away of
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What are the advantages of piers constructed monolithically with the bridge deck over usage of bearings?
Basically, piers constructed monolithically with the bridge deck are advantageous in the following ways: (i) Movement of the bridge deck
What are the disadvantages of curing by ponding and polythene sheets?
The purpose of curing is to reduce the rate of heat loss of freshly placed concrete to the atmosphere and
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