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首页> 外文期刊>Journal of bridge engineering >Friction Coefficients for Slide-In Bridge Construction Using PTFE and Steel Sliding Bearings
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Friction Coefficients for Slide-In Bridge Construction Using PTFE and Steel Sliding Bearings

机译：使用PTFE和钢滑动轴承滑动桥梁施工摩擦系数

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摘要

Slide-in bridge construction (SIBC) has been used in accelerated bridge construction (ABC) for the last decade. Slide-in bridge construction is carried out using bearing pads consisting of polytetrafluoroethylene (PTFE) and steel sliding surfaces. In this study, coefficient of friction (COF) measurements were made with variable surface roughness, lubrication type, sliding speed, and contact pressure. Among three tested surfaces, the rough rolled stainless steel and the carbon steel produced COF values much higher than those of stainless steel with a #2B surface. Unlubricated and graphite-lubricated surfaces resulted in very high friction values, whereas the values for soap, grease, and oil were comparably lower. The oil and grease tests gave the lowest friction values, 0.90-4.04% and 0.67-5.15%, for the studied contact pressures, respectively, and are recommended for future use. Higher contact pressures typically resulted in lower COF values. Overall, the currently recommended COF values underpredict the COF compared with the results from this study. However, for higher contact pressures, this study found lower COF (e.g., for high pressure of 55MPa, 2% versus 0.9-1.44%) compared with current recommendations and the opposite for low contact pressures (e.g., for 11MPa, 2.71% versus 4.04-5.66%). Unlubricated sliding surfaces are not recommended due to the large scatter in comparable data in this study and the literature.
机译：最后十年来，滑动桥梁建筑（SIBC）已被用于加速桥梁建筑（ABC）。使用由聚四氟乙烯（PTFE）和钢滑动表面组成的轴承垫进行滑动桥梁结构。在该研究中，用可变表面粗糙度，润滑型，滑动速度和接触压力进行摩擦系数（COF）测量。在三个测试表面中，粗轧不锈钢和碳钢生产的COF值远高于与＃2B表面的不锈钢的值。无螺旋和石墨润滑的表面导致摩擦值非常高，而皂，油脂和油的值相当较低。石油和润滑脂检验分别为研究的接触压力分别提供了最低摩擦值，0.90-4.04％和0.67-5.15％，建议使用以供将来使用。较高的接触压力通常导致COF值较低。总体而言，目前推荐的COF值欠本研究的COF的预测性。然而，对于更高的接触压力，该研究发现，与当前建议和低接触压力（例如，11MPa，2.71％，2.71％，2.71％，对45MPa的高压，2％，而是0.9-1.44％的高压55MPa的高压，2％，2.71％，与4.04）相反，而是较低的COF（例如，对于55MPa，而对0.9-1.44％的高压）相反-5.66％）。由于本研究中的可比较数据中的大散射而建议不要推荐非润滑的滑动表面。

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