| 谢昕,陈清波,安正斌,朱潇钰,沈杰,姚蔚,徐丰.折线配筋先张梁弯起器所致预应力损失试验与仿真研究[J].矿产勘查,2024,15(S2):133-139 |
| 折线配筋先张梁弯起器所致预应力损失试验与仿真研究 |
| Experimental and simulation study on prestress loss caused by the bending device of prestressed tendons using the pre tensioning method |
| 投稿时间：2024-08-26 |
| DOI：10.20008/j.kckc.2024s2018 |
| 中文关键词: 折线先张 弯起器 仿真分析 预应力损失 |
| 英文关键词: broken line pre-tensioned beam redirector CAE prestress loss |
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| 中文摘要: |
| 折线配筋先张梁是一种新型的预应力混凝土梁，目前已在桥梁工程中开始应用。其较好的受力方式解决了直线先张梁跨度较小的不足，既保留了先张法的优点，又避免了后张法中诸多技术难题，能够有效地降低梁端的主拉应力，提高构件的耐久性和抗剪能力。折线配筋先张梁制作过程中，弯起器是关键构件之一，本文结合某环线工程，研究弯起器在钢绞线张拉中引起的预应力损失，进行了折线先张梁弯起器预应力损失试验，通过 Workbench有限元软件对弯起器受力性能进行三维仿真参数化分析，为折线配筋先张梁弯起器的工程应用提供参考和数据支持。 |
| 英文摘要: |
| The pre-tensioned beam with folded-line reinforcement is a novel type of prestressed concrete beamand has been employed in bridge engineering currently. Its superior force-bearing pattern addresses the deficiency of the small span of the straight-line pre-tensioned beam. It not only retains the merits of the pre-tensioning method but also circumvents numerous technical predicaments in the post-tensioning method，effectively reducing theprincipal tensile stress at the beam end and enhancing the durability and shear resistance of the component. During the manufacturing process of the pre-tensioned beam with folded-line reinforcement，the bender is one of the key components. To explore the prestress loss induced by the bender during the tensioning of the steel strand，this paper，in combination with a certain ring road project，conducts a prestress loss test of the bender of the pre-tensioned beam with folded-line and undertakes a simulation study on the mechanical performance of the pulley-type bender via the Workbench finite element software，providing references and data support for the engineering application of the bender of the pre-tensioned beam with folded-line reinforcement. |
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