how to model cable suspended bridge in SAP2000
how to model cable suspended bridge in SAP2000
(OP)
Hi, I am modelling a 220m suspended bridge. the cable geometry was defined by including a 22m vertical sag; it gives a 27438 kgf of horizontal tension. then I want to draw the tensor so i decided to modify the cable geometry by dividing it into 72 parts, but each section has changed the horizontal compount of the cable and I dont know how to keep the horizontal tension in the 72 sections as the theory says. (H is constant in the cable).
my second question is that the target force could be set at the both ends (I or J) but the 72 parts have differents forces because of the angle.
please help me, thsnks
my second question is that the target force could be set at the both ends (I or J) but the 72 parts have differents forces because of the angle.
please help me, thsnks






RE: how to model cable suspended bridge in SAP2000
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
Chinese prisoner wins Nobel Peace Prize
RE: how to model cable suspended bridge in SAP2000
RE: how to model cable suspended bridge in SAP2000
One idea is to make sure that you are defining the gravity loads as vertical, not normal to the cable. If the loads were applied normal to the bowed cable, the horizontal component of tension would vary along the length.
It strikes me also that potentially the bigger problem here would be dealing with wind, seismic, and vibration issues, rather than just a static analysis, in which case a good bit more insight from someone used to designing suspension structures might be in order.
RE: how to model cable suspended bridge in SAP2000
Michael.
Timing has a lot to do with the outcome of a rain dance.
RE: how to model cable suspended bridge in SAP2000