PT Journal
AU Kristek, V
   Vrablik, L
   Hrdousek, V
TI Causes of long-term deflections of large-span pre-stressed concrete box girders and recommendations on how to avoid these
SO Transactions on Transport Sciences
PY 2008
BP 97
EP 102
VL 1
IS 3
DI 10.5507/tots.2008.014
DE bridge; creep; deflection; pre-stressed concrete; shear
AB The results of the presented solutions and the developed analytical and design methods will help in creating the sufficient theoretical tools for the reliable and economic structural design of bridges without deflection impairments. The paper reviews the causes of under-estimation of long-term future deflections. Special attention is placed on prestressing - a procedure to find the optimal arrangement of tendon layout - is presented, facilitating the avoidance of tendons contributing to deflection increases. A developed computer program is freely available and a method of repair procedure and a repair example, as well as recommendations for the design practice are also presented.
ER