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重力式码头抗滑、抗倾稳定性的简化可靠指标设计方法研究

发布时间:2018-12-11 01:17
【摘要】:抗滑、抗倾稳定性是重力式码头结构设计的重要内容,目前采用的设计方法是基于可靠度的分项系数设计方法。分项系数方法虽然比安全系数方法前进了一步,但仍不能全面合理考虑荷载、材料性能等存在的不确定性。如由于不同填料(砂或石)材料性能变异性的不同,码头抗滑、抗倾稳定性的可靠度不同;对于墙后不同填料的情况,分项系数方法采用相同的分项系数,并不能对可靠度的不同进行区分。所以,《重力式码头设计与施工规范》(JTS167-2-2009)附录D给出了重力式码头抗滑、抗倾稳定性按可靠指标的设计方法,但该方法并不完善,主要反映如下两个方面:①按JC方法计算可靠指标比较麻烦,需要借助专门的程序,不便于设计人员使用;②没有波浪作用(波吸力)的统计参数和概率分布,不能用于有波浪力情况的设计。为此,结合交通运输部西部交通建设科技项目“重力式码头抗滑、抗倾稳定性的可靠度指标设计方法研究”,本论文开展了重力式码头抗滑、抗倾稳定性简化可靠指标计算方法和设计方法的研究。主要内容包括以下3个方面: (1)提出了不考虑波浪力作用情况下重力式码头抗滑、抗倾稳定性可靠指标的简化计算方法,采用简化计算公式可直接计算无波浪力时码头抗滑、抗倾稳定性的可靠指标,计算结果与JC法的计算结果非常接近。 (2)提出了考虑波浪力作用情况下重力式码头抗滑、抗倾稳定性可靠指标的简化计算方法,采用简化计算公式直接计算有波浪力时码头抗滑、抗倾稳定性的可靠指标,计算结果与JC法的计算结果同样非常接近。 (3)提出了重力式码头抗滑、抗倾稳定性的简化可靠指标设计方法,通过标准值抗作比与可靠指标的关系,采用给定的设计可靠指标可直接对码头进行抗滑、抗倾稳定性进行验算。
[Abstract]:Anti-slip and anti-dip stability is an important content in the design of gravity wharf structure. At present, the design method is based on the reliability of the sub-factor design method. Although the sub-factor method is a step forward from the safety factor method, the uncertainty of load and material properties can not be considered comprehensively and reasonably. For example, because of different filler (sand or stone) material performance variability, wharf anti-slide, anti-dip stability reliability is different; For the case of different fillers behind the wall, the method of partial coefficient can not distinguish the reliability. Therefore, Appendix D of the Code for Design and Construction of Gravity Wharf (JTS167-2-2009) gives the design method of the anti-skid and anti-dip stability of gravity wharf according to the reliable index, but the method is not perfect. It mainly reflects the following two aspects: (1) it is difficult to calculate the reliability index according to the JC method, so it is not convenient for the designer to use it because of the need of special program; 2 the statistical parameters and probability distribution without wave action (wave suction) can not be used in the design of wave force. Therefore, combining with the west transportation construction project of the Ministry of Communications and Transport, "study on the reliability index design method of anti-skid and anti-dip stability of gravity wharf", this paper carried out anti-skid resistance of gravity wharf. Research on simplified calculation method and design method of reliability index for anti-dip stability. The main contents include the following three aspects: (1) A simplified calculation method for the reliability index of anti-skid and anti-dip stability of gravity wharf without considering the action of wave force is proposed. The simplified formula can be used to directly calculate the reliability index of anti-skid and anti-dip stability of wharf without wave force. The calculated results are very close to those of JC method. (2) A simplified calculation method for the reliability index of anti-skid and anti-dip stability of gravity wharf considering the action of wave force is put forward, and the reliability index of anti-skid and anti-dip stability of wharf with wave force is directly calculated by simplified formula. The calculated results are very close to those obtained by JC method. (3) A simplified reliability index design method for the anti-skid and anti-dip stability of gravity wharf is put forward. Through the relation between the standard value anti-performance ratio and the reliability index, the design reliability index can be used to directly prevent the wharf from sliding. The stability of anti-inclination is checked.
【学位授予单位】:大连理工大学
【学位级别】:硕士
【学位授予年份】:2014
【分类号】:U656.111

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