【摘要】 研究了不同安全等级、永久荷载起不利作用和有利作用、多个可变荷载组合作用下的港口工程钢筋混凝土结构构件的可靠度.讨论了结构抗力以综合随机变量表示和以基本随机变量表示时可靠指标计算结果的差别.结果表明,钢筋混凝土构件的抗剪可靠度较低,二级与一级构件、三级与二级构件的可靠指标相差约为0.5,相同安全等级的构件当永久荷载起不利作用时的可靠指标略大于起有利作用的可靠指标.结构抗力用两种不同表示方式分别计算的构件可靠指标也有所差别.更多还原

【Abstract】 The reliabilities of reinforced concrete elements of harbor engineering with different safety classes, permanent load properties (favorable or unfavorable) and a combination of variable loads are calculated, and the differences of calculated values of reliability index which the structure resistance is expressed with compound random variables and with basic random variables are discussed. Comparison results show that the shear reliability of reinforced concrete element is low, and that the difference between reliabilities of class Ⅱ and class Ⅰ elements as well as class Ⅲ and class Ⅱ elements is approximately 0. 5. The reliability with favorable permanent load is lower than that with unfavorable permanent load for the elements with the identical safety class, and the difference is apparent for elements when a different resistant expression is used.更多还原