Estimation of Extremes of Combination of Stochastic Load Effects by Turkstra's Rule

Several approximate combination formulas are currently in use for est imating the extreme values of linear combination of load effects. In this paper the focus is on one particular example of such a combinati on formula, viz. the so-called Turkstra's rule. A specific version of this formula has been implemented in one of API's Recommended Practi ce documents. Turkstra's rule was originally limited to the combinati on of statistically independent load effect components. It will be sh own that this combination formula can be implemented in such a way th at statistical dependence between the load effect components can be t aken into account. This makes it possible to investigate the performa nce of this particular combination formula both for independent and d ependent load effect components.