欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
由于跨海桥梁的环境效应有别于一般桥梁，正常使用极限状态所对应的目标可靠度也必然不同，因此，基于JESS模式规范建议了目标可靠度指标分别为1．5，2．0和2．3的跨海桥梁基础结构正常使用极限状态三级可靠度水平，并提出了一种可变荷载系数的标定新方法，即通过各类荷载引起的钢筋拉应力对于混凝土裂缝宽度的贡献率不同建立基于钢筋拉应力的正常使用极限状态方程．最后，依据可靠度计算的校准法，结合具体工程进行了基于目标可靠度的可变荷载频遇值系数和准永久值系数的标定，通过设计实践证明所建议的目标可靠度指标值是合理的，采用的标定新方法是可行的．
英文摘要：
The target reliability indices of the foundation structures of sea-crossing bridges on the serviceability limit state （SLS） are different from those of common bridges due to their different surroundings. Consequently, three levels of the target reliability indices, which are 1.5, 2. 0 and 2. 3, respectively, for those structures on the SLS are suggested based on the Joint Committee on Structural Safety （JCSS） model code, and a new method of calibrating factors of live loads, which is based on the contribution ratio of tensile stresses of reinforcing bars produced by various loads to the maximum crack width of concrete, is proposed. Finally, the calibration of the reliability-based factors of the frequent value and the quasi-permanent value of live loads is conducted by the Joint Committee （JC） method through an actual design, and the indices are proved to be reasonable and the new method is proved to be feasible.
同期刊论文项目
同项目期刊论文
Field inspection on chloride ion-intrusion effect of seawater in dry-wet cycling zone of concrete st
Determination and application of the sharp degradation point of concrete under environmental actions
Spatial variability-based corrosion risk assessment and strategy of repair and maintenance for RC st
期刊信息
位置：