在RM中定义好荷载工况和施工进度后 ,为什么计算总是出现荷载工况不存在?

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  • Hi Fog,

    I'm assuming your question is: “After defining the load case and construction schedule in RM, why is the calculation always appear that the load case does not exist?

    If this is the question, from the screenshot I could see that there is a clear reason for the load case not existing: When calculated this Load Case leads to a negative pivot. It means there are some wrong definitions causing unstable conditions. The issue is with input that causes negative diagonal terms when the system of equations is solved.

    The Error list provides some hints on the Node number and the specified DOF: Degree Of Freedom (directions) to be verified by the user. Right click on the screen and in View Options select Draw support conditions and Draw hinges to check visually the supports.

    I hope this answers your question and you understand how to correct it and proceed with your analysis.

    If you have remaining issues please do not hesitate in contacting us with a Service Request for more support information.

    Best regards,

    Marcos Beier

    marcos.beier@bentley.com

    Senior Technical Support Engineer, Bridge

    MSc., Structural Analysis Specialist, Civil Engineer, RM Bridge Enterprise

    Bentley Systems Inc.

    www.bentley.com.br

    Answer Verified By: fog xt 

Reply
  • Hi Fog,

    I'm assuming your question is: “After defining the load case and construction schedule in RM, why is the calculation always appear that the load case does not exist?

    If this is the question, from the screenshot I could see that there is a clear reason for the load case not existing: When calculated this Load Case leads to a negative pivot. It means there are some wrong definitions causing unstable conditions. The issue is with input that causes negative diagonal terms when the system of equations is solved.

    The Error list provides some hints on the Node number and the specified DOF: Degree Of Freedom (directions) to be verified by the user. Right click on the screen and in View Options select Draw support conditions and Draw hinges to check visually the supports.

    I hope this answers your question and you understand how to correct it and proceed with your analysis.

    If you have remaining issues please do not hesitate in contacting us with a Service Request for more support information.

    Best regards,

    Marcos Beier

    marcos.beier@bentley.com

    Senior Technical Support Engineer, Bridge

    MSc., Structural Analysis Specialist, Civil Engineer, RM Bridge Enterprise

    Bentley Systems Inc.

    www.bentley.com.br

    Answer Verified By: fog xt 

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