Excessive Prestressed loss in Prestressed concrete continuous beam bridge and continuous rigid frame bridge cause structures to be different types of diseases .Based on elastic contact theory , the theoretical distribution of contact stress in curving hole should be different to the prevailing distri‐bution applied to design .In order to explore the real distribution of contact stress ,using the CT scan‐ning technique to test a model and to obtain the overall trend of actual distribution of contact surface stress .The test results show that the actual contact surface stress in curving hole is inconsistent with the design and create a certain deviation in the current curving hole friction loss design .%运营中的连续梁桥、连续钢构桥预应力损失过大,导致桥梁过早破坏。基于弹性接触理论,指出弯曲孔道摩阻损失中接触应力应为中间大、两边小分布,与现行设计中接触应力分布规律不符。为了探讨弯曲孔道预应力摩阻损失中接触应力分布的真实规律,运用CT扫描技术对接触应力试验模型进行试验,得出接触面上实际应力的总体分布趋势。结果表明,预应力弯曲孔道摩阻损失设计计算中接触应力分布规律与实际分布规律不相符,造成现行弯曲孔道预应力摩阻损失设计值与实际损失值有一定偏差。
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机译:作为基于PC的测量供应商超过20年的经验,探索ni独有的基于PC的测量的吸引力近年来,许多测量仪器制造商开始使用“基于PC的测量”这一术语。美国国家仪器公司(National Instruments,以下简称ni)是基于pc的测量市场的先驱,其为基于pc的测量提供了称为“ pc + pc接触式/插入式测量仪”的解决方案已有20多年的历史了。在这里,我们询问了基于PC的测量的吸引力,这是nl所独有的。