【作者】 蔡翔宇；

【导师】 蒋建群；

【作者基本信息】 浙江大学 ， 水工结构， 2007， 硕士

【摘要】 随着社会经济的发展和城市化的推进，城市交通系统的大规模发展趋势极为迅速。然而在城市交通发展的同时，随之而来的环境振动问题也日益得到广泛重视，因此对于环境振动评价方法的研究引起了越来越多的关注。本文回顾了环境振动问题的研究现状，介绍了环境振动的理论基础，包括振动评价量、振动评价标准种类以及各种评价标准的影响因素。分析了各国环境振动评价标准，重点介绍了各国的生理标准，即振动对人体舒适性的限值标准。并针对GB 10070-88《城市区域环境振动标准》存在的问题进行了初步的分析。论文通过对交通荷载随机特性及其振动传播规律的研究，发现振源和评价点的随机振动都满足高斯正态分布规律，指出采用单一限值评定交通荷载引起的环境振动存在着明显的不足。由于环境振动本身具有随机特性，同时人、结构以及精密仪器等振动受体对环境振动的反应是随受体的种类以及受振的环境而变化的，只有兼顾上述两者的环境振动评价标准才是完善的。因此，本文引入失效概率的概念，提出了单一限值结合限值失效概率的环境振动评价方法。通过对某环境振动评价案例进行计算，分析了各种参数对环境振动评价结果的影响。在此基础上，对GB 10070-88《城市区域环境振动标准》提出了修改意见，为基于交通荷载随机特性的环境振动评价奠定了理论基础。更多还原

【Abstract】 With the urbanization, the traffic system such as subway, viaduct in additional to surface road is developing very quickly, and at the same time resulting in serious environmental vibration pollution, thereby attracting more attentions on its vibration level evaluation.However, the traffic loading behaves strong randomicity, so we can not use single observation to distinguish how the traffic induced vibration to affect activities of production or daily life. In this study, the environmental vibration evaluation standard in different country were reviewed, and the deficiency of randomicity considering of traffic loading is obvious, especially in GB 10070-88,the China Standard of Environments Vibration in City Area.The stochastic characteristics of traffic loading was investigated to point out the current environmental vibration restriction is only an average value, and there exists transparent comparability between vibration source and observation object. After further studies for specific vehicle random loading and objects, the probability of failure was suggested to define the stochastic characteristics of source and vexation of object. As a result, a monograph was presented to modify the conventional environmental vibration evaluation standard, which can be calculated via Mathematica and used to reflect randomicity of traffic loading induced vibration properly and different environmental vibration control demand from level of 50dB to 100dB.更多还原