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第六次大提速要求京沪线上海-昆山段动车运行速度达到250km/h,这对该区段内钢桁梁桥钢梁阻尼比、加速度、动应力及轨枕横向位移和桥上列车脱轨系数及轮重减载率均提出了更高的要求。根据国内外对250km/h时速线路桥梁技术性能的研究,结合中槎浦桥40m半穿式钢桁梁检定测试试验方案,对桥梁检定试验中应注意的问题进行了研究。
The sixth major speed increase required that the running speed of motor cars in Shanghai-Kunshan section of the Beijing-Shanghai line reach 250km / h. This indicates that the damping ratio, acceleration, dynamic stress and transverse displacement of steel girder and the derailment coefficient And wheel load reduction rate have put forward higher requirements. According to the research on the technical performance of 250km / h speed-line bridges at home and abroad, combined with the verification test program of 40m half-penetrated steel trusses of Zhongpipu Bridge, the problems that should be paid attention to in the bridge test are studied.