Dear All,
Is there a specific way to control the camber of prestressed concrete element under a specific prestressing force? and if after application of all loads, the camber still exist, dose it affect the load carrying mechanism of the element?
Thank you.
CAMBER CONTROL IN SIMPLY SUPPORTED PRESTRESSED CONCRETE BRIDGE GIRDERS
By Osamah Ibrahim Mahmood
When designing a bridge, serviceability usually controls and is a more important factor than the ultimate capacity of the bridge or the allowable stresses. Therefore, the behavior of the bridge girder deflection and camber must be predicted as accurately as possible. Therefore, excessive camber has become one of the most common problems when constructing concrete bridges. Different methods have been developed to overcome this problem. The most common and widely used is using haunch with adjustable pedestals to overcome the excessive camber. However, this method has limitations that must be considered. Therefore, this study is evaluating the effectiveness of using post tensioning jacking strands at the top flange of simply supported bridge girders to reduce the excessive camber and make it equal to the design camber.
.....
http://uknowledge.uky.edu/cgi/viewcontent.cgi?article=1009&context=ce_etds
During design, or after casting? During the design you can debond strands towards the end of girder which is basically low moment region. You may also use harped strands
Ali A. Abdulhameed .....Good question… Please check references below.. hope it will be helpful for you…
Regards…
https://uknowledge.uky.edu/cgi/viewcontent.cgi?article=1009&context=ce_etds
http://tti.tamu.edu/documents/193-1F.pdf
INTRODUCTION TO CAMBER CONTROL, PRESTRESSED CONCRETE BRIDGE GIRDERS - JOURNAL OF ADVANCES IN PHYSICS - Vol 4 No 2
- Badges
- Science topic
- Similar topics
- Force