bridgeengineer2007
Civil/Environmental
Hello all,
How have you all distinguished between the FR and TU force calculation for a steel Fixed or Expansion Bearing? In my experience, I have applied 10% of the DL as the Friction Force for Expansion Bearings. However, AASHTO is vague on how to calculate the Thermal Force TU for a Fixed Bearing. I understand the calculation for the total expansion/contraction amount based on the formula (the formula that includes the temperature rise/fall and coefficient of thermal expansion), but how do you all translate that movement into a TU force per bearing?
Thanks for the help!
How have you all distinguished between the FR and TU force calculation for a steel Fixed or Expansion Bearing? In my experience, I have applied 10% of the DL as the Friction Force for Expansion Bearings. However, AASHTO is vague on how to calculate the Thermal Force TU for a Fixed Bearing. I understand the calculation for the total expansion/contraction amount based on the formula (the formula that includes the temperature rise/fall and coefficient of thermal expansion), but how do you all translate that movement into a TU force per bearing?
Thanks for the help!