General Mechanical

General Mechanical

Problem with solving the reinforced concrete beam

    • Joseph Lim
      Subscriber

      Dear community, 


       


      I was trying to solve the reinforced concrete beam using the element commands tools (for concrete and reinforcement). However, after I run the analysis, the following error occurs:


      i)  Material properties may only contain 100 data values. 


      The starting position for material EX is 200000 which is outside this range. The MPDATA command is ignored. 


       


      when using the command below:


      Similar commands in the modelling folder.


       


      ii) Constraint equation 1 has unused node 10652.                           


      when using the command below:


      et,matid,solid65


      MP,Ex,matid,1500


      MP,Prxy,matid,0.2


      MP,Dens,matid,2400e-9


      TB,concr,matid


      tbdata,1,0.3,1,0.304,4.278


      Do you have an idea? Thank you very much in advance for your help and time. 

    • dinhan0394
      Subscriber

      Hi Lim,


      I see an issue in your code defining Material Properties on LineBody:


      MPDATA,EX,MATID,2e5


      Syntax for MPDATA command: MPDATA, Lab, MAT, SLOC, C1, C2, C3, C4, C5, C6


      with SLOC is Starting location in table for generating data.


      For Young's Modulus property, it's only contain 100 data values. So, when you define SLOC=2e5, which is outside this range.


      Recommend: use MP,EX command instead of MPDATA command

    • dinhan0394
      Subscriber

      For second problem, please use option: Element order = Linear (dropped) in Mesh setting

    • Joseph Lim
      Subscriber

      Hi AnPham,


      Thank you very much for the reply! It helps me to solve the problem related to command. 


       


      However, I realised that the load vs deflection curve is directly proportional, which I was not able to identify the ultimate load. Do you have any suggestions for this problem?


      Thank you very much in advance. 


       


      Regards


      Lim 

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