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 […]
Questions and Answers
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
What are the disadvantages of curing by ponding and polythene sheets? Read Post »
Under what situation should engineers use pot bearings instead of elastomeric bearings?
In the event of high vertical loads combined with large angle of rotations, rubber bearings are undesirable when compared with
Under what situation should engineers use pot bearings instead of elastomeric bearings? Read Post »
Under what situation shall engineers use jacking at one end only and from both ends in prestressing work?
During prestressing operation at one end, frictional losses will occur and the prestressing force decreases along the length of tendon
Sometimes the side of concrete bridges is observed to turn black in colour. What is the reason for this phenomenon
In some cases, it may be due to the accumulation of dust and dirt. However, for the majority of such
Should raking piles of a bridge abutment be placed under an embankment?
For a bridge abutment to be supported on raking piles with different orientations, the movement between the ground and the
Should raking piles of a bridge abutment be placed under an embankment? Read Post »
Polytetrafluoroethylene (PTFE) is commonly used in sliding bearings. Why?
The choice of sliding surface of bearings is of vital importance because the sliding surfaces generate frictional forces which are
Polytetrafluoroethylene (PTFE) is commonly used in sliding bearings. Why? Read Post »
Is it desirable to use concrete of very high strength i.e. exceeding 60MPa? What are the potential problems associated with such high strength concrete?
To increase the strength of concrete, say from 40MPa to 80MPa, it definitely helps in improving the structural performance of
In bridge widening projects, the method of stitching is normally employed for connecting existing deck to the new deck. What are the problems associated with this method in terms of shrinkage of concrete?
In the method of stitching, it is a normal practice to construct the widening part of the bridge at first