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公路桥梁安全性评价是近些年来日趋热门的一个课题。对既有公路桥梁进行安全性评价是判断公路桥梁承载能力,及时采取恰当的养护、维修、加固或重建工作的前提,也是减少恶性事故的一种有效途径。客观、准确的桥梁安全性评价不但可使公路桥梁的维修费用得到合理运用,还可避免因结构毁坏而引起的重大经济损失和不良社会影响。灰色系统理论是研究预测问题时发现概率统计追求大样本量,而时间序列法只致力于数据拟合,而不着重规律的发现,他希望在可利用数据不多的情况下找到长期作用规律,从而形成了灰色系统理论。灰色系统理论的主要内容包括以灰色朦胧集为基础的理论体系,以灰色关联空间为依托的分析体系,以灰色序列生成为基础的方法体系,以系统分析、评价、建模、预测、决策、控制、优化为主体的技术体系。
Safety evaluation of highway bridges is an increasingly hot topic in recent years. The evaluation of the safety of the existing highway bridges is a prerequisite for judging the bearing capacity of highway bridges and bridges and timely and appropriate maintenance, repair, reinforcement or reconstruction. It is also an effective way to reduce the accidents. The objective and accurate evaluation of bridge safety not only can make reasonable use of the maintenance cost of highway bridges, but also can avoid the significant economic loss and adverse social impact caused by the structural damage. The gray system theory is to find the probabilistic statistics to pursue a large sample size while researching the forecasting problem, but the time series method is only devoted to the data fitting, but does not pay attention to the regular discovery. He hopes to find the long-term law of action when there is not enough available data, Thus forming a gray system theory. The main contents of gray system theory include the theoretical system based on gray hazy set, the analytic system based on gray relational space, the gray system based on method of sequence analysis, system analysis, evaluation, modeling, prediction, decision-making, Control, optimization as the main technical system.