摘要
利用位移方法进行隧道喷混凝土衬砌结构可靠性分析时,拟合曲线的形式对可靠度的计算结果有着直接的影响.本文在给出隧道喷混凝土衬砌结构的功能函数的基础上,分别用圆曲线、抛物线、双曲线和正弦曲线拟合拱顶曲线,按Monte＿Carlo法对部分实例进行了结构可靠指标计算.结果表明,抛物线和正弦曲线的效果最好,圆曲线次之,双曲线在位移法中则不宜采用.
In the reliability analysis of the shotcrete lining in tunnel with the displacement_based method, the type of the interpolated curve influences the calculated results greatly. First, performance functions for section failure are given. Secondly, interpolated formulae for inner outline of tunnel lining are achieved in circle, parabola, hyperbola, and sinusoid. Finally, with the displacement_based method the reliabilities of shotcrete lining of two tunnels are calculated. The results show that parabola is the best curve that goes well with in_situ situation, following with sinusoid and then circle, while hyperbola is not suitable for displacement_based method.
出处
《北方交通大学学报》
CSCD
北大核心
2003年第1期84-86,共3页
Journal of Northern Jiaotong University
关键词
位移方法
喷混凝土衬砌
结构可靠度
拟合曲线
displacement_based method
shotcrete lining
structural reliability
interpolated curve
