| 水平荷载下桩的可靠性分析 |
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| 引用本文： | 洪平,洪汉平.水平荷载下桩的可靠性分析[J].岩土力学,2004,25(7):1111-1115. |
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| 作者姓名： | 洪平 洪汉平 |
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| 作者单位： | 1.南昌航空工业学院 土建系，江西 南昌 330034 ；2.加拿大西安大略大学 土木与环境工程系 |
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| 摘 要： | 由于桩及桩周土的材料性能参数的不确定性，桩的响应也是不确定的。在考虑桩的水平荷载、桩周土反力及桩的刚度等不确定因素情况下，采用一阶可靠度分析方法对水平受荷桩的最大弯矩及桩顶的最大位移进行了可靠性分析，进 而，考虑分布参数的不确定性，用点估计法预估桩的失效概率，对给定的p-y曲线进行桩的可靠性分析。研究表明，在失效概率相对较低的情况下，水平荷载下基桩的失效概率与随机变量的分布类型假定有较大关系，随机变量分布参量的不确定性只会对桩的失效概率产生较小的影响。
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| 关 键 词： | p-y曲线 可靠性 概率 位移 最大弯矩 |
| 文章编号： | 1000-7598-(2004)07-1111-06 |
| 收稿时间： | 2003-05-06 |
Reliability analysis of laterally loaded piles |
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| HONG Ping,HONG Han-ping.Reliability analysis of laterally loaded piles[J].Rock and Soil Mechanics,2004,25(7):1111-1115. |
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| Authors: | HONG Ping HONG Han-ping |
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| Institution: | 1. Department of Civil Engineering, Nanchang Institute of Aeronautical Technology, Nanchang 330034 , China; 2. Department of Civil and Environmental Engineering, University of Western Ontario, Ontario, N6A 5B9 |
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| Abstract: | Since the material properties of the pile and the soil surrounding the pile are uncertain, so the responses of pile are uncertain too. Reliability analysis of the responses such as the maximum bending moment in the pile and the pile head displacement were presented. The analyses of responses of pile were obtained by discretizing the pile as beam elements and by using the p-y curve to represent the soil resistance. Reliability analyses of laterally loaded pile were carried out using the first order reliability analysis method by considering the uncertainty in horizontal loading, the soil resistance and the stiffness of pile. Further, the effect of the uncertainty in the probability distribution parameters on the estimated failure probability was investigated using the point estimate method. The numerical results for the considered examples seem to suggest that the influence of the uncertainty in the probability distribution parameters on the estimated reliability is not very significant. |
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| Keywords: | p-y curve reliability probability displacement maximum bending moment |
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