论文部分内容阅读
本文对采用2200MPa级别钢绞线的挤压锚固拉索进行锚固性能研究,成功研发了一种适用于旧桥换索的强度级别高、锚具外径小的拉索锚固结构。经有限元分析,在不增加锚具直径的条件下,适当增加挤压余量和挤压长度,优化了挤压锚结构及参数。静载试验证明,改进措施有效地提高了锚固性能,拉索的锚固效率系数符合标准要求,为预埋管尺寸受限的旧桥换索工程提供了很好的解决方案。
In this paper, 2200MPa grade steel strand extrusion anchorage cable anchorage performance research, successfully developed a suitable for old bridge cable strength level, anchorage cable diameter small anchorage structure. The finite element analysis, without increasing the diameter of the anchor conditions, the appropriate increase in the residual pressure and extrusion length, optimizing the extruded anchor structure and parameters. The static load test proves that the improvement measures effectively improve the anchorage performance, the anchor efficiency coefficient of the cable meets the standard requirements, and provides a good solution for the old bridge replacement project with the limited size of the embedded pipe.