一 国家级标准 5.2.5 支撑结构设计 注1:支撑结构的设计计算方法可参照GB 50017。 根据5000N/m2的载荷计算或实测的最大挠度,不应大于支承距离l1的1/750。对于公共交通型自动扶梯和自动人行道,根据5000N/m2的载荷计算或实测的最大挠度不应大于支承距离的1/1000。 汇总:普通型自动扶梯:1/750;公交型自动扶梯:1/1000。 EN 115:1995
The supporting structure shall be designed in such a way that it can support the dead weight of the escalator or passenger conveyor plus a passenger weight of 5000 N/m2 [load carrying area = nominal width z1(see Figure 2) of the escalator or passenger conveyor×distance between supports l1(see Figure 1)].An impact factor shall not be added to the passenger load. Based on passenger weight, the maximum calculated or measured deflection shall not exceed 1/750 of the distance between supports l1. Based on passenger load, the maximum calculated or measured deflection shall not exceed 1/1000 of the distance between supports l1.
5.2.5 Structural design NOTE Load carrying area = (nominal width z1(see Figure 6) of the escalator or moving walk)×(distance l1 between the supports)(see Figure 5). Based on the structural rated load for the comb plate and floor plate the maximum deflection shall not exceed 4 mm and the meshing of the combs shall be ensured. 2008版 EN 115 关于桁架挠度的指标与2017版相同,此处不再赘述。 此处为个人点评部分,仅供参考 个人猜测可能原因如下: 2 用于自动扶梯桁架挠度计算的载荷数值是 5000 N/m2,如果折算到每个梯级上,大约是180kg的载荷,一台自动扶梯上,每个梯级上都站着两个 90kg的大汉,按这个指标去计算桁架,应该也是足够安全了。
桁架挠度要求:1/1500。 华盛顿市
桁架挠度要求:1/1500。 美国公交协会
一 指标与成本 做销售的同志应该要熟悉各地的最低要求指标,用最低的成本满足客户的要求才是最优解。 可以直接参考以下标准
无论是编写国家标准,地方标准或是行业标准,难点不在于确定产品本身的指标要求,毕竟大家对于本行业的产品要求肯定是非常精通的。反而当产品的某项指标与跨行业的其他产品有交集,或者说能够参考或借鉴时,此时如何设定具体指标,是需要反复斟酌的。
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