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I'm building a bridge model, main girder is 6 T beams, don't consider bridge panel, so must make six T-beams movetogether, like a body, how to make ? what's more, piers is fixed to the upper structure, so want to make the pier , capping beam,and the girders move together, can we use 'rigidlink' ? Th...

I want to make multiple nodes in a line move as a body ，how to do？'rigid link' is between double nodes , if it can use among nodes ,how to decide which one is the master node, which one is the slave nodes? By the way，cammad 'EqualDOF' how to use it?

I try to set up a bridge model .The pier is 30m. If set the element length as 30m,the period of the whole structure is 1.47s，but set the length of each element as 5m，the period is 0.83m； set the length of each element as 10m，the period is 0.87m； set the length of each element as 15m，the period is 1....

OK,thanks a lot！

After define the mass ，I wanna caculate the period of the bridge for rationality. but after i input the program to caculate ,it shows this error "0x004f3d51 instruction references memory of 0x00000000. This memory can't be‘read’ ." THIS IS MY PROGRAM： wipe; source DisplayPlane.tcl; # proce...