基于可靠度的道路不设缓和曲线最小半径的计算
收稿日期: 2012-08-22
网络出版日期: 2013-07-15
基金资助
国家自然科学基金项目(51078088)
Calculation of Minimum Circular Radius of Road without Transition Curve Based on Reliability
Received date: 2012-08-22
Online published: 2013-07-15
杨晨, 程建川 . 基于可靠度的道路不设缓和曲线最小半径的计算[J]. 公路交通科技, 2013 , 30(7) : 7 -11 . DOI: 10.3969/j.issn.1002-0268.2013.07.002
Compared with the roadway design specifications of some countries and regions,the minimum circular radii without transition curve are larger in Chinese specifications． On one hand,the computational model is inconsistent,but the most important factor is that the Chinese specifications adopt a more conservative concept． In order to verify the reasonability of using a larger value in Chinese specification,with consideration of the uncertainty of roadway alignment design parameters,the performance function of the design parameters at limit state is developed based on reliability theory to solve the reliability index by means of first order second moment method and Monte Carlo method． The reliability index is applied to analyze the value of the minimum radius of circular curve without transition curve,and the value is compared with those in the current specifications． The results show that the minimum radius of circular curve without transition curve in Chinese design specification for highway and urban road should be smaller．
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