【摘要】 针对目前常用的地下管道地震应力的简化计算方法未考虑地震波入射方向和地震地面运动加速度的问题,提出了基于地震波入射角的地下管道地震应力的简化计算方法。首先,以弹性地基梁理论和地震波动力学理论为基础,引入地震波入射角φ,根据管土间相互作用的原理,推导了管土之间相互作用系数—变形传递系数,求得了基于地震波入射角的地下管道直线段和弯头段的地震应力的理论计算公式,并且考虑了地震地面运动加速度。然后,通过计算实例分析了地震波入射角对于不同口径埋地管道最大地震应力的影响,与目前国内外常用地下管道地震应力计算方法对比,结果表明该方法是一种简单易行、可靠合理的方法。该方法对工程实际中地下管道的抗(防)震设计具有一定的参考价值。更多还原

【Abstract】 Because of unconsidering the incident angle of earthquake wave and earthquake ground motion acceleration in current common calculation methods of underground pipeline,a new calculation method of earthquake stress of underground pipeline was presented considering the incident angle of earthquake wave.At first,based on the elastic foundation beam(EFB) theory and dynamics of earthquake wave,the model of movement deformation for underground pipeline under earthquake is set up,the incident angle of earthquake wave is introduced into the analysis of interaction between underground pipeline and soil,the coefficient of interaction between underground pipeline and soil-deformation transmission is deduced according to the characteristics of interaction between pipeline and soil,and the earthquake stress formulas for underground pipeline is gotten.Then,an example is studied by the new method to analyze the influence of the incident angle of earthquake wave on the maximum earthquake stresses of different diameter underground pipelines,compared with several common methods at home and abroad,the calculated results show that the new method is simple,effective and rational,and this method can provide reference to seismic design of underground pipeline in engineering practice.更多还原