I am trying to model a simply support multi-span prestressed concrete I-girder bridge and do the pushover analysis.I don’t know how to link AASHTO type I and type III girder model in the model of bridge.Is it by using command “geomTransf Linear” command ?In this bridge it has 8 girders (Type I at exterior end and type III at middle).Where should i apply the lateral load (either in girder or deck )to perform pushover analysis as there is no column in between the span?I would appreciate your ideas and guidance.Thank you.
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