*In order to lighten the prestressed concrete solid members, nowadays, it is possible to make use of the advantage of HPC (fc*'*>60*

*MPa) as well as replacing the solid section with a PSC thin-walled section for certain members such as circular and box columns.*

*Using the strength theory of ACI, a numerical procedure along with a computer program was developed for the analysis of such*

*sections subjected to axial compression or tension load and bending moments. The program solves for all possible variables such*

*as, concrete compressive strength (fc*'*= 60-100 MPa), type of prestressed steel, concrete cover, ratio of wall thickness to the section*

*dimensions and the PS steel arrangements to satisfy the given loading cases, thus leading to an optimal cost solution. However,*

*since the cross section is thin-walled circular or box and the PS steel is located at discrete points along the periphery of a circle*

*or rectangle, the equations of equilibrium are complex for hand computations (especially for circular section) but suitable for*

*computer program. So, by use of MATLAB software the interaction diagrams were also drawn for the analysis of such sections*

*for all mentioned variables. The use of prestressed thin-walled column diagrams is a safe and easy tool for the analysis of such*

*columns. Finally, the accuracy of the proposed method is demonstrated by comparing its results to those of the available*

*experimental values and is indicate that the proposed method predict very well the capacity of prestressed thin-walled column.*

Type of Study: Research Paper |
Subject:
Structure- Concrete