【作者】 张春宇；

【导师】 贡金鑫；

【作者基本信息】 大连理工大学 ， 结构工程， 2005， 硕士

【摘要】 根据《港口工程结构可靠度设计统一标准》(GB50158)修订的需要,对港工建筑物的钢筋混凝土构件,板桩码头及重力式码头进行了可靠度的分析。本文首先研究了港口工程钢筋混凝土结构构件不同结构等级、永久荷载起不利作用和起有利作用、多个可变荷载组合时承载能力的可靠度,还讨论了抗力以综合随机变量形式表达和以基本随机变量形式表达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。然后对板桩码头利用弹性线法与弹性地基梁法两种不同的方法进行设计分析。通过对涉及板桩码头安全性能的四个指标,踢脚稳定性、拉杆抗拉强度、板桩抗弯强度及锚锭板稳定性的计算,可得到同一算例在不同的设计方法下的不同结果。列出其在不同设计水位及不同的荷载组合情况的下的弯矩分布情况,逐一分析了板桩入土深度与荷载的关系曲线。并对两种方法在不同的设计水位下的情况分别进行了可靠指标的计算,发现在同样的设计条件下不同的设计方法得出的可靠指标会相差很大。但此结果对板桩结构的可靠度进行更深入的分析,选择一套协调的、可靠度一致性好的分项系数提供了理论支持。本文最后还对重力式码头进行抗滑及抗倾稳定性分析并进行可靠度的计算,分析了抗力仅等于荷载的边界设计的可靠度与初始设计的可靠度的差异。本文结果均可供港口工程结构设计标准和规范修订参考。更多还原

【Abstract】 According to the requirements of 《The unified standards of reliability design of harbor engineering》 ,it need a reliability analyse for reinforced concrete structure,sheet-pile wharf and gravity wharf of harbor engineering building. First of all, the reliability of reinforced concrete element of harbor engineering with different safety classes,permanent load properties (favorable or unfavorable) and a combination of variable loads are caculated , and the difference of calculated values of reliability index which the structure resistance is expressed with compand random variables and with basic random variables. Comparison results show that the shear reliability of reinforced concrete element is low, and that the difference between reliability of class Ⅱ and class Ⅰ element as well as class Ⅲ and class Ⅱ element is approximately 0.5. The reliability with favorable permanent load is lower than that with unfavorable permanent load for the element with the identical safety class, and the difference is apparent for element when a different resistant expression is used. And then it analyse sheet-pile wharf by using of elastic line method and elastic foundation beam method. By computing four index which involved security of sheet-pile,including extend strength of anchor arm,bend strength of sheet-pile and skirt stability .It can get different result by using of different design method for one caculational example. It list the distribution of moment with different design water level and different load combination. Then analyse the connection of sheet-pile depth in the dust .Reliability level of one calculational example can be calculated by use of two different methods,and find it’s result is different too much.But the result can supply theory gist for analyse reliability of sheet-pile wharf and choose a suit of harmonize coefficient.In the last, the dissertation analyse the antidumping stability and antiskid stability for caisson quaywall and then calculate their reliability index.It analyse the difference of reliability between boundary design when load be equal to resisting force and the first design.All of these will provide a reference for design standard and criterion of harbor engineering.更多还原