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从调查中原地区城镇住宅楼面活荷载出发,阐述了建立持久性及临时性活荷载概率模型的过程。根据统计得到的房间单位面积的重量,按不同使用功能将房间分类,绘制各类房间荷载分布折线图,根据折线图形状呈左偏态的特点,假设统计荷载服从极值Ⅰ型分布,采用χ2检验法对假设的分布进行检验。结果表明,各种情况下均没有理由拒绝统计荷载服从极值Ⅰ型分布。给出了代表中原地区城镇住宅楼面持久性活荷载和临时性活荷载最大值的概率分布函数和统计参数,对编制荷载新规范具有参考价值。
Starting from the investigation of live loads of urban residential buildings in the Central Plains, the process of setting up a probabilistic model of persistent and temporary live loads is described. According to the statistics of the weight of the unit area of the room, according to the different use of the function of the room classification, drawing various types of room load distribution line chart, according to the shape of the line chart was left-skewed characteristics, assuming statistical load obeys extreme Ⅰ type distribution, using χ2 Test method to test the distribution of the hypothesis. The results show that there is no reason in all cases to reject statistical loads subject to the extreme type I distribution. The probability distribution function and statistical parameter which represent the permanent live load and temporary live load of residential buildings in urban areas of Central Plains are given, which is of reference value to the new load specification.