摘要
为确定举高消防车的等效均布活荷载,根据后轴数量将举高消防车分为四种类型,通过这种方法确定消防通道的等效荷载,可以有效克服了举高消防车型号繁多的难题。消防通道等效均布荷载主要受举高消防车后轴数量与单轴重量的控制。当地下室顶板覆土深度为零、或覆土深度较大且后轴数量多于3时,举高消防车的等效荷载可能超过我国现行《建筑结构荷载规范》(GB 50009-2012)规定的消防车等效均布荷载值。根据举高消防车救援状态的使用条件,通过求解受力平衡方程,得到举高消防车整体稳定系数的最小值为1.126,单个支腿最大反力可达举高消防车总重量的二分之一。提出考虑车身重量和支腿垫板尺寸影响的等效荷载计算公式,可用于确定举高消防车救援场地单向板和双向板的等效均布荷载。当覆土深度较小时,举高消防车支腿反力的等效均布荷载可能远大于现行《建筑结构荷载规范》(GB 50009-2012)的规定值。通过适当增大支腿垫板尺寸,可以有效减小举高消防车救援场地的等效均布荷载。
For determining the equivalent uniformly distributed live load of high-rise aerial fire engines,they are classified into four types upon the number of rear axles.By using this method to determine the equivalent load of fire exits,the problem of numerous types of high-rise fire trucks can be effectively overcome.The equivalent uniformly distributed load of fire exits is mainly controlled by the number of rear axles and the weight of a single axle of the high-rise aerial fire engine axle.When the depth of soil cover on the basement roof is zero,or when the depth of soil cover is large and the number of rear axles is more than 3,the equivalent uniformly distributed load of high-rise aerial fire engines may exceed the value specified in the current"Load code for the design of building structures"GB 50009−2012 in China.According to the usage conditions of fire engine rescue states,by solving the force balance equations,the minimum value of the overall stability coefficient of the high-rise aerial fire engines is 1.126,and the maximum reaction force of the outrigger legs is half of the total fire engine weight.For determining the equivalent uniformly distributed load of one-way and two-way plates within the field for firefighting of high-rise aerial fire engines,the calculation formulas that takes into account the influence of vehicle weight and outrigger leg pad size are proposed.When the depth of the soil cover is small,the equivalent uniformly distribution load of the maximum reaction force of the outrigger legs of the fire engines may be much greater than that of the current provisions of“Load Code for Building Structures”GB 50009−2012.By increasing the size of the outrigger pad appropriately,the equivalent uniformly distributed load of the high-rise aerial fire engine rescue state can be effectively reduced.
作者
郝汉林
范重
宁晨
张成义
阚强
朱丹
HAO Han-lin;FAN Zhong;NING Chen;ZHANG Cheng-yi;KAN Qiang;ZHU Dan(China Architecture Design&Research Institute,Beijing 100044,China;Logistics Equipment Department,Beijing Fire and Rescue Corps,Beijing 100035,China;School of Civil Engineering and Transportation,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)
出处
《工程力学》
北大核心
2025年第S1期78-88,共11页
Engineering Mechanics
基金
中国建筑设计研究院有限公司科技创新基金项目(1100C080240192)。
关键词
举高消防车
消防通道
救援场地
等效均布荷载
有限元分析
fire engine
fire exit
field for fire fighting
equivalent uniformly distributed load
finite element analysis
