Finite Element Modeling of Continuous Span Steel I-girder bridge
Finite Element Modeling of Continuous Span Steel I-girder bridge
(OP)
Dear All,
I am new member in this discussion group. I have one question. I want to develop the FE model of the continuous span Steel I-girder bride which has 5 Spans with four continuous support in between the two abutments. The total length of bridge is 184 meter.There is one modular type expansion joint near the abutment. My final objective will be to predict the noise generation(Acoustics) by the vibration of concrete deck and steel girders by using this FE model and its modal properties.I think It will be not so reasonable to model whole bridge since I am interested only in one edge span with the expansion joint.And there is node no limitation in ANSYS. I need to consider finer mesh to analyse in higher frequency range.So my question is: Is it possible to model only one span of continuous type bridge? How can I give the boundary condition at the continuous edge of the bridge if I take only one span. Or is it possible to get real behavior of the bridge by taking only one span.
Your suggession will be highly appreciated.
I am new member in this discussion group. I have one question. I want to develop the FE model of the continuous span Steel I-girder bride which has 5 Spans with four continuous support in between the two abutments. The total length of bridge is 184 meter.There is one modular type expansion joint near the abutment. My final objective will be to predict the noise generation(Acoustics) by the vibration of concrete deck and steel girders by using this FE model and its modal properties.I think It will be not so reasonable to model whole bridge since I am interested only in one edge span with the expansion joint.And there is node no limitation in ANSYS. I need to consider finer mesh to analyse in higher frequency range.So my question is: Is it possible to model only one span of continuous type bridge? How can I give the boundary condition at the continuous edge of the bridge if I take only one span. Or is it possible to get real behavior of the bridge by taking only one span.
Your suggession will be highly appreciated.





RE: Finite Element Modeling of Continuous Span Steel I-girder bridge
corus
RE: Finite Element Modeling of Continuous Span Steel I-girder bridge
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: Finite Element Modeling of Continuous Span Steel I-girder bridge
this works for statics, may not work for acoustics.
maybe you could use superelements (NASTRAN term, ANSYS will call it something different) to model the remote part of the bridge, and a detail model for the span in question.
again, not my area of expertise, but do you need a fine mesh for acoustic analysis ... you may need to model small details of the structure
good luck
RE: Finite Element Modeling of Continuous Span Steel I-girder bridge
RE: Finite Element Modeling of Continuous Span Steel I-girder bridge