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Civil Engineering QUESTION #6621
Question 1
In a beam with a very thin web, 'Tension Field Action' can be utilized to carry shear forces after the web has buckled. This is analogous to the behavior of:
  • A suspension bridge cable
  • A Pratt truss with tension diagonals✔️
  • A concrete arch
  • A cantilevered column
Correct Answer Explanation
Tension field action occurs in plate girders where the web buckles under shear, and the post-buckling strength is developed by diagonal tension fields (the web acts like the tension diagonals of a truss).