TBT1878-2002预应力混凝土枕疲劳试验方法.pdf

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1、TB中华人民共和国铁道行业标准TB/T1878－2002预应力混凝土枕疲劳试验方法2002-05-17发布2002-12-01实施中华人民共和国铁道部发布标准分享网www.bzfxw.com免费下载TB/T1878－2002目次前言·································································································································Ⅱ1范围·······

2、·······················································································································12试验设备及量测工具············································································································13试验图式············

3、··················································································································14试验步骤和方法···················································································································25试验报告单···········

4、···············································································································3附录A（提示的附录）预应力混凝土枕疲劳强度检验记录表······················································4ITB/T1878－2002前言预应力混凝土枕疲劳试验方法是科研试验、轨枕质量控制的重要方法标准之一，在科研试验上可使获得的数

5、据更严谨、更可信，在质量控制上可达到更准确、更公正的目的。经过修改后提出的标准，在试验机的精度、试验图式的对中误差、试验方法等方面提出了更严格的要求，比原标准更规范、可操作性更强，而且试验数据可对比性更好。本标准附录A为提示的附录。本标准自实施之日起代替TB/T1878－1987。本标准由铁道部运输局基础部提出。本标准由铁道部标准计量研究所归口。本标准起草单位：铁道科学研究院铁道建筑研究所、铁道专业设计院、铁道部标准计量研究所。本标准起草人：范佳、侯文英、孙法林、林之珉。II标准分享网www.bzfxw.c

6、om免费下载中华人民共和国铁道行业标准TB/T1878－2002代替TB/T1878－1987预应力混凝土枕疲劳试验方法1范围本标准规定了标准轨距铁路预应力混凝土枕（含岔枕、宽枕、桥枕）的疲劳试验方法。本标准适用于标准轨距铁路预应力混凝土枕（含岔枕、宽枕、桥枕）科学研究、新产品开发及产品质量检验的疲劳试验。2试验设备及量测工具2.1预应力混凝土枕（以下简称轨枕）疲劳试验应采用准确度为一级的疲劳试验机，加载振动频率在4Hz~8Hz之间。2.2观测裂缝宽度用20倍读数放大镜，读数精度为0.01mm，并有照明设备

7、。3试验图式3.1轨下截面的试验图式如图1所示。单位为mm①一面具有1:40坡度的钢板（10mm×20mm）；②木板垫板（100mm×15mm）③承垫钢板（100mm×20mm）④钢轴直径d为30mm~40mm或钢球半径R=40mm；⑤钢轴直径d为30mm~40mm或钢球半径R=150mm。图1检验荷载Fmax与检验弯矩M的关系式可由下式确定：Fmax=7.273M⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯（1）中华人民共和国铁道部2002-05-17批准2002-12-01实施1TB/T1878－2002式中：Fm

8、ax——检验龄期的疲劳检验荷载最大值（kN）；M——检验龄期的疲劳检验弯矩（kN·m）。M由设计图给出。3.2中间截面的试验图式如图2所示。其中，检验弯矩M与检验荷载Fmax的关系可由式（1）确定。M由设计图给出。单位为mm①平钢板（100mm×20mm）；②木板垫板（100mm×15mm）；③具有根据轨枕设计图规定坡度的钢板（100mm×20mm）；④钢轴直径d为30mm~40mm或钢球半径R=40mm；⑤钢轴