球形支座低温试验方法设计及试验结果分析
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摘要
球型支座低温性能是高寒地区桥梁结构安全性判定中重要的参数。传统的常温试验方法无法测试出球型支座的低温力学性能,因此设计球型支座低温试验方法并对其低温性能进行研究非常有必要。详细阐述球型支座在-50℃低温条件下的抗冷冻性能、竖向承载性能、摩擦系数、水平承载力及转动性能的试验装置和试验方法、试验结果。通过对低温试验结果与常温23℃试验数据进行分析比对表明,随着温度降低,球型支座摩擦系数和转动力矩变大,其他性能受低温影响不明显,这对球型支座的研发和试验有一定的指导作用。
The low temperature performance of spherical bearing is a key parameter for determining the structural safety in bridges in alpine areas. Traditional normal temperature tests cannot determine the low temperature mechanical property of spherical bearing. Therefore,it is very necessary to design a low temperature spherical bearing test and study its low temperature performance. The article specifies the test devices,methods and results for the antifreeze performance,vertical bearing capacity,friction coefficient,horizontal bearing capacity and rotation capability of spherical bearing at a low temperature of -50 ℃. It analyses the low temperature test results and the 23 ℃ normal temperature test data and indicates that,as the temperature drops,the friction coefficient and turning moment of spherical bearing increase,with a minor impact on other low temperature performance. Thus it is instructive to some extent for studying and testing spherical bearings.
The low temperature performance of spherical bearing is a key parameter for determining the structural safety in bridges in alpine areas. Traditional normal temperature tests cannot determine the low temperature mechanical property of spherical bearing. Therefore,it is very necessary to design a low temperature spherical bearing test and study its low temperature performance. The article specifies the test devices,methods and results for the antifreeze performance,vertical bearing capacity,friction coefficient,horizontal bearing capacity and rotation capability of spherical bearing at a low temperature of -50 ℃. It analyses the low temperature test results and the 23 ℃ normal temperature test data and indicates that,as the temperature drops,the friction coefficient and turning moment of spherical bearing increase,with a minor impact on other low temperature performance. Thus it is instructive to some extent for studying and testing spherical bearings.
引文
[1]陈彦北,孔令俊.耐磨板对球型支座受力性能的影响[J].铁道建筑,2012(7):12-14.
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[4]林达文,彭立群.隔震橡胶支座力学性能试验研究[J].铁道建筑,2014(2):30-33.
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[7]铁道部经济规划研究院.铁路桥梁球型支座:TB/T 3320-2013[S].
[8]公路桥梁多级水平力球型支座:JT/T 873-2013[S].
[9]桥梁双曲面球型减隔震支座:JT/T 927-2014[S].
[10]结构支座第7部分:球状和柱状PTFE支座:EN 1337-7:2004[S].
[11]株洲时代新材料科技股份有限公司.球型支座试验大纲[Z].株洲:株洲时代新材料科技股份有限公司,2015.
[2]彭立群,林达文.桥梁支座低温反力矩试验方案设计及应用[J].铁道建筑,2012(7):20-23.
[3]彭立群,林达文.桥梁大吨位支座水平承载力试验装置设计及应用[J].铁道建筑,2014(1):28-30.
[4]林达文,彭立群.隔震橡胶支座力学性能试验研究[J].铁道建筑,2014(2):30-33.
[5]王进,谭帅霞,林达文.轨道交通橡胶弹性元件配方分析和性能试验技术[M].北京:中国铁道出版社,2013.
[6]中华人民共和国交通运输部.桥梁球型支座:GB/T 17955-2009[S].北京:中国标准出版社,2009.
[7]铁道部经济规划研究院.铁路桥梁球型支座:TB/T 3320-2013[S].
[8]公路桥梁多级水平力球型支座:JT/T 873-2013[S].
[9]桥梁双曲面球型减隔震支座:JT/T 927-2014[S].
[10]结构支座第7部分:球状和柱状PTFE支座:EN 1337-7:2004[S].
[11]株洲时代新材料科技股份有限公司.球型支座试验大纲[Z].株洲:株洲时代新材料科技股份有限公司,2015.