[1] Jin Weiliang, Hu Qizhong, Shuai Changbin, Yu Qunli, et al. Design of foundation structuresof sea-crossing bridges on serviceability limit state [J]. Journal of Southeast University (English Edition), 2008, 24 (1): 74-79. [doi:10.3969/j.issn.1003-7985.2008.01.017]
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Design of foundation structuresof sea-crossing bridges on serviceability limit state(
)
跨海桥梁基础结构正常使用极限状态的设计方法
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 24
- Issue:
- 2008 1
- Page:
- 74-79
- Research Field:
- Mathematics, Physics, Mechanics
- Publishing date:
- 2008-03-30
Info
- Title:
- Design of foundation structuresof sea-crossing bridges on serviceability limit state
- 跨海桥梁基础结构正常使用极限状态的设计方法
- Author(s):
- Jin Weiliang1; Hu Qizhong1; Shuai Changbin2; Yu Qunli2; Lu Zheng2
-
1Institute of Structural Engineering, Zhejiang University, Hangzhou 310027, China
2 Command Post of Zhoushan Island-Mainland Link Project, Zhoushan 316000, China
- Keywords:
- sea-crossing bridges; target reliability; JC(Joint Committee)method; frequent value; quasi-permanent value; foundation structures
- PACS:
- TB114.3
- DOI:
- 10.3969/j.issn.1003-7985.2008.01.017
- Abstract:
- 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.
- 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JCSS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.
References:
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[5] API RP2A-LRFD Recommended practice for planning, designing and constructing fixed offshore platforms-load and resistance factor design[S].Houston:American Petroleum Institute, 1995.
[6] Jin Weiliang, Song Zhigang, He Yong, et al.Calibration of target reliability for existing offshore structures[R].Hangzhou:Institute of Structural Engineering of Zhejiang University, 2004.(in Chinese)
[7] Zhang Shiduo, Zhang Qiwei.Reliability analysis of serviceability limit state design approach for reinforced concrete members in bridge [J].China Journal of Highway and Transport, 1992, 5(4):26-30.(in Chinese)
[8] Bian Haiyang.Target reliability analysis of piles for bridges in the region of Jiangsu [J].Jiangsu Transportation Research, 1998, 20(2):20-24.(in Chinese)
[9] Jin Weiliang.Theory of engineering load combination and its application [M].Beijing:China Machine Press, 2006.(in Chinese)
[10] GB/T 50283—1999.Unified standard for reliability design of highway engineering structures[S].Beijing:China Planning Press, 1999.(in Chinese)
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Memo
- Memo:
-
Biography: Jin Weiliang(1961—), male, doctor, professor, jinwl@zju.edu.cn.
Foundation item: The National Natural Science Foundation of China(No.50538070).
Citation: Jin Weiliang, Hu Qizhong, Shuai Changbin, et al.Design of foundation structures of sea-crossing bridges on serviceability limit state[J].Journal of Southeast University(English Edition), 2008, 24(1):74-79.