Based on fracture mechanics and theory of reliability, this paper offers the reliability calculation method for welded box beam having fracture.

根据断裂力学及可靠性理论，提出了一种起重机焊接箱形梁存在裂纹缺陷的可靠度计算方法。

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Damage criterion of structure by blasting seismic is fixed, and dynamic reliability calculation method of structure by blasting seismic action is obtained.

确定了爆破地震作用下建筑结构物的破坏准则，并得到了爆破地震作用下计算结构动力可靠度的方法。

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The test analysis and calculation results further proved the exactness of the reliability calculation method and the stability of the roadbed slope in test section.

由试验分析和计算结果进一步验证了试验路基边坡的稳定性及可靠性计算方法的准确性。

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