[1]王路,程建川.基于可靠度的高速公路准临界坡长[J].东南大学学报(自然科学版),2018,48(1):181-187.[doi:10.3969/j.issn.1001-0505.2018.01.028]
 Wang Lu,Cheng Jianchuan.Pre-critical grade length of expressway based on reliability[J].Journal of Southeast University (Natural Science Edition),2018,48(1):181-187.[doi:10.3969/j.issn.1001-0505.2018.01.028]
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基于可靠度的高速公路准临界坡长()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
48
期数:
2018年第1期
页码:
181-187
栏目:
交通运输工程
出版日期:
2018-01-20

文章信息/Info

Title:
Pre-critical grade length of expressway based on reliability
作者:
王路12程建川1
1东南大学交通学院, 南京 210096; 2镇江市公路管理处, 镇江 212028
Author(s):
Wang Lu12 Cheng Jianchuan1
1School of Transportation, Southeast University, Nanjing 210096, China
2Zhenjiang Highway Management Department, Zhenjiang 212028, China
关键词:
准临界坡度 坡长 可靠度 极限状态 公路设计
Keywords:
pre-critical grade grade length reliability limit state highway design
分类号:
U412.33
DOI:
10.3969/j.issn.1001-0505.2018.01.028
摘要:
为了防止对规范的恶意透支使用,提出了一种基于概率设计的方法来计算准临界坡长.采用结构工程中极限状态设计理念,考虑供给与需求之间的关系,构建系统可靠度与失效概率的数学模型.基于10年事故数据分析及现场追踪采集的381辆爬坡车辆速度变化特征,构建爬坡极限状态方程.利用一阶可靠度方法和蒙特卡罗仿真法分别进行数值计算和抽样仿真,对结果做敏感性分析.研究表明,当前我国《公路路线设计规范》中最大坡长值能够满足轻型车和中型车的爬坡需求,但对于重型车比例较大的高速公路,规范中设计坡长值显得较为严格或苛刻,从而降低了高速公路的运行速度,减少了交通通行能力.利用可靠度理论可以量化对坡长值的选用,获取连续可靠的计算值.
Abstract:
To prevent malicious overdraft use of the specifications, a probabilistic method was presented to calculate the pre-critical grade length. According to the limit state design concept of structural engineering and considering the relationship between supply and demand, the models of the reliability index and the failure probability of the system were established. Based on a set of 10 year crash data and the speed variation of 381 climbing vehicles tracked in site, the equation of the climbing limit state was put forward. The first-order reliability method and the Monte Carlo simulation were used for numerical calculation and sampling simulation, respectively. The sensitivity analysis was applied to evaluate the calculation results. The results show that the maximum slope length in the current China Design Specification for Highway Alignment can meet the climbing demand of light and middle-sized vehicles, but the design values of the slope length in the specification are strict or demanding for expressways with high percentage heavy vehicle, which reduces the vehicle speed and decreases the traffic capacity. The reliability theory can be used to quantify the selection of the slope length and obtain continuous and reliable calculation values.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期: 2017-07-09.
作者简介: 王路(1986—),男,博士生;程建川(联系人),男,博士,教授,博士生导师,jccheng@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(51478115)、江苏省普通高校研究生科研创新计划资助项目(KYLX_0165).
引用本文: 王路,程建川.基于可靠度的高速公路准临界坡长[J].东南大学学报(自然科学版),2018,48(1):181-187. DOI:10.3969/j.issn.1001-0505.2018.01.028.
更新日期/Last Update: 2018-01-20