PSR_1
Civil/Environmental
- Aug 9, 2016
- 56
Hello guys!
Beyond the decompression moment lies the idea of partial pre-stressing. ACI based approach is to limit the tensile stresses at service load to a certain hypothetical limit based on the structural member type. This approach is heavily criticized by some Eurocode based books but not banned completely ( R. I. Gilbert et. al.). In stead a design based on crack width limitation is put forth. Eurocode's approach to partial pre-stressing is to limit the width of crack to a certain limit or perform decompression check based on exposure class. for severe exposure class the required decompression check will lead to the use of more pre-stressing ( correct me if I am wrong) and the crack width limitation approach will reduce the amount of pre-stressing required but lead to more rebar demand for crack width control ( correct me If I am wrong). my question is as follows: Is there any design approach based on Eurocode or any other code to arrive at a design with less rebar and optimum tendon? optimum tendon is a vague term, so to define it let's say one less than that we get based on ACI based stress limit approach.
Beyond the decompression moment lies the idea of partial pre-stressing. ACI based approach is to limit the tensile stresses at service load to a certain hypothetical limit based on the structural member type. This approach is heavily criticized by some Eurocode based books but not banned completely ( R. I. Gilbert et. al.). In stead a design based on crack width limitation is put forth. Eurocode's approach to partial pre-stressing is to limit the width of crack to a certain limit or perform decompression check based on exposure class. for severe exposure class the required decompression check will lead to the use of more pre-stressing ( correct me if I am wrong) and the crack width limitation approach will reduce the amount of pre-stressing required but lead to more rebar demand for crack width control ( correct me If I am wrong). my question is as follows: Is there any design approach based on Eurocode or any other code to arrive at a design with less rebar and optimum tendon? optimum tendon is a vague term, so to define it let's say one less than that we get based on ACI based stress limit approach.
