thanks for the comments, Im using General Structural Analysis (GSA) 8.4 version, the software allows me to modify the stiffness parameters of the section (i.e damping, I) but in my case I am assuming an uncracked section for both the prestressed slab and the concrete slab with prestress removed...
Thank you for your post. I imagined the slab to be stiffer also (assuming the slab is uncracked due to prestress) therefore reducing deflections which would result in different natural frequencies but using a analysis software package the results showed the normal concrete section to have the...
I have been carrying out some research and believe that prestressing a concrete member may help to reduce deflection but it does not affect the dynamic modal properties of the member. The natural frequency (1st dynamic mode) of the structure remains the same. Has anyone any comments?
