Evaluation of the Probability of the Steel Beam to Collapse in Accordance with the Normal Distribution Load

철골보의 정규하중분포에 따른 파손확률 평가

  • Received : 2014.05.19
  • Accepted : 2014.06.19
  • Published : 2014.06.30


Based on the reliability theory, the risk assessment of steel beams is performed by the determination of failure probability. In the calculation, bending, shearing and combined (bending + shearing) modes are examined. The resistance and the loads on the beam are assumed to be normal distribution. To investigate the failure probability changes, total load applied at the mid span of beam is divided into 1 to 1 and 1 to 2 ratio and then these divided loads are placed on the trisected points on beam. The change of boundary conditions at beam ends are also included in the investigation. It shows that failure is governed by the combined mode for the present beams and the second order bound analysis of failure probability is not crucial. On the whole failure probability decreases with increasing end restraints at the beam ends with some exception.