Re: Chinese Daily Photos, Videos & News of 2013!!!
I actually highly doubt this project will ever be finished, at least without major changes. Broad Group has only built 4 prefabbed buildings before, the tallest of which was only 30 storeys, so the experience is definitely not there. A building this tall will need to have vertical and torsional stiffness to resist extremely high lateral wind loads, for example, using giant concrete filled steel columns extending through the whole height of the building (i.e. Taipei 101) or a concrete core with buttressed concrete walls protruding from the core (i.e. Burj Khalifa). In my mind it would be very difficult to achieve the needed stiffness of the structure without using concrete, as they are proposing. Even if they do, the concrete would have to be cured in stages, so in order to build 204 floors in 90 days, they would need to build on average slightly more than 2 floors per day. Concrete cure time, as a rule of thumb, is 7 days to strip forms and 28 days to achieve workable structural strength. So there is no way they can meet the 90 days schedule they are proposing.
The Shanghai Tower sure is impressive though!
I actually highly doubt this project will ever be finished, at least without major changes. Broad Group has only built 4 prefabbed buildings before, the tallest of which was only 30 storeys, so the experience is definitely not there. A building this tall will need to have vertical and torsional stiffness to resist extremely high lateral wind loads, for example, using giant concrete filled steel columns extending through the whole height of the building (i.e. Taipei 101) or a concrete core with buttressed concrete walls protruding from the core (i.e. Burj Khalifa). In my mind it would be very difficult to achieve the needed stiffness of the structure without using concrete, as they are proposing. Even if they do, the concrete would have to be cured in stages, so in order to build 204 floors in 90 days, they would need to build on average slightly more than 2 floors per day. Concrete cure time, as a rule of thumb, is 7 days to strip forms and 28 days to achieve workable structural strength. So there is no way they can meet the 90 days schedule they are proposing.
The Shanghai Tower sure is impressive though!
