| 摘要: |
| 可靠度校准是分析按规范设计的结构的可靠度，分析的是规范规定的结构安全度水平；分项系数设计法采用多个系数反映设计中各变量存在的不确定性，设计的结构比采用单一安全系数法具有更好的可靠度一致性，因此更为合理。结合《干船坞设计规范(水工结构)》(JTJ 252-87)的修订，对扶壁式坞墙稳定性进行了可靠度校准和分项系数法设计。提出了扶壁式坞墙抗滑和抗倾稳定性的设计可靠指标，给出了扶壁式坞墙抗滑和抗倾稳定性验算的分项系数表达式和分项系数的建议值。分析表明，按现行《干船坞设计规范(水工结构)》(JTJ 252-87)设计的扶壁式坞墙抗滑和抗倾稳定性的可靠指标分别为3.1和3.8。根据这一校准结果，确定扶壁式坞墙抗滑和抗倾稳定性验算表达式中的抗力分项系数分别为1.00和1.30。 |
| 关键词: 扶壁式坞墙 抗滑稳定性 抗倾稳定性 可靠度 分项系数 |
| DOI： |
| 分类号:U673.33 |
| 基金项目:交通运输部西部交通建设科技项目（20113288231510） |
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| Reliability analysis and sub-coefficient method design for stability of counterforted quay wall |
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GAO Shu-fei
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The State Key Laboratory of Coastal and Offshore Engineering， Dalian University of Technology
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| Abstract: |
| Reliability calibration hereby means the analysis of the structure reliability designed according to the specifications, which is an analysis of the safety level of structures specified by the specifications. Because the sub-coefficient design method adopts uncertainty of the variables in designing coefficients, the designed structure has better reliability consistency in comparison with adoption of a single safety factor method, and therefore it is more reasonable. Based on the revised Code for Design of Dry Dock (Hydraulic Structures) (JTJ 252-87), the reliability of stability for the counterforted quay wall is calibrated and the sub-coefficients are designed in this paper. As a result, the anti-sliding and anti-overturning stability reliablity indexes designed have been presented for the counterforted quay wall, and the expression and the suggested values of sub-coefficient in verifying anti-sliding and anti-overturning stability for the counterforted quay wall have been given. The analysis results show that the anti-sliding and anti-overturning stability reliability indexes designed for the counterforted quay wall, in accordance with the Code for Design of Dry Dock (Hydraulic Structures) (JTJ 252-87), are expressed as 3.1 and 3.8 respectively. And based on this verification result and level of safety, the resistance factors in the sub-coefficients of the expression calculating the anti-sliding and anti-overturning stability of the counterforted quay wall would be taken as 1.00 and 1.30 respectively. The analysis and calculation results mentioned above can provide a reference for modifying the existing dry dock design specifications |
| Key words: counterforted quay wall anti-sliding stability anti-overturning stability reliability sub-coefficients |
