بررسی احتمال خرابی اعضا ی فلزی تحت انواع مودهای خرابی

In this research, failure probability of steel elements designed in accordance with the Iranian national steel regulation is investigated. To determine the probability of failure, a technique of gradient vector based on the minimum distance of limit state function to origin in the standard normal space is applied. Three examples, a tensile member, a thin column and a beam with two spans are assumed and studied. Limit state functions of the extent of resistance based formulation used in the Iranian national steel regulation and uncertainties in loads, dimensions and strength of members are incorporated. The probability distribution functions suitable for describing the statistical characteristics of random variables in loads, dimension and strength are applied. The results show probability of failure in the example of thin column under axial buckling load is more the two other examples of tensile member and two spans beam.

کلیدواژه ها:

شاخص قابلیت اعتماد ، احتمال خرابی ، اعضای فلزی ، مود خرابی