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 […]
Questions and Answers
In incremental launching method of bridge construction, what are the measures adopted to enhance sufficient resistance of the superstructure during the launching process?
(i) During the launching process the leading edge of the superstructure is subject to a large hogging moment. In this
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
In joints of precast concrete bridge segments, what are the functions of applying epoxy adhesive?
Epoxy adhesive is applied in these joints for the following purposes according to International Road Federation (1977): (i) It seals
In erection of falsework, for a rectangular panel inside a falsework should it be braced along the two diagonals?
When a rectangular panel is subject to an eccentric load or a lateral load, it tends to deform into a
In prestressing work, if more than one wire or strand is included in the same duct, why should all wires/strands be stressed at the same time?
If wires/strands are stressed individually inside the same duct, then those stressed strand/wires will bear against those unstressed ones and
In carrying out compression test for concrete, should test cubes or test cylinders be adopted?
Basically, the results of compression test carried out by using cubes are higher than that by cylinders. In compression test,
In the design of elastomeric bearings, why are steel plates inserted inside the bearings?
For elastomeric bearing to function as a soft spring, the bearing should be allowed for bulging laterally and the compression
In a curved prestressed bridge, 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