STRUCTURAL RELIABILITY UNDER COMBINED RANDOM LOAD SEQUENCES
STRUCTURAL RELIABILITY UNDER COMBINED RANDOM LOAD SEQUENCES
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DOI：
10.1016/0045-7949(78)90046-9
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发表时间：
1978-01-01
影响因子：
4.7
通讯作者：
FIESSLER, B
中科院分区：
文献类型：
--
作者：
RACKWITZ, R;FIESSLER, B
提出了一种计算复合载荷作用下结构可靠度的算法。结构上的载荷或任何其他作用都被建模为独立的随机序列。相关的极限状态准则是逐点逼近的切超平面。然后，时变作用的组合减少到随机变量总和的最大值的计算，这通过极值和其他非正态分布函数的正态分布的适当离散近似来促进。迭代算法搜索极限状态准则上的近似点，在该近似点处，由切超平面限定的失效域的概率内容达到其最大值。该方法可以处理任意类型的连续极限状态准则和任意分布的荷载。该方法被示出为一段墙没有拉伸强度加载的弯矩和法向力。
An algorithm for the calculation of structural reliability under combined loading is formulated. Loads or any other actions upon structures are modelled as independent random sequences. The relevant limit state criterion is pointwise approximated by a tangent hyperplane. The combination of time-variant actions then reduces to the calculation of the maximum of a sum of random variables which is facilitated through proper, discrete approximation of extreme value and other non-normal distribution functions by normal distributions. The iteration algorithm searches for an approximation point on the limit state criterion where the probability content of the failure domain limited by the tangent hyperplane reaches its maximum. Any type of continuous limit state criterion and any distribution type for the loads can be dealt with. The method is illustrated for a section of a wall without tensile strength loaded by a bending moment and a normal force.