斜拉桥主塔环向预应力布设对主塔受力性能的影响研究  

Study on the Influence of Circumferential Prestressing Layout on the Stress Performance of the Main Tower of a Cable-stayed Bridge

作　　者：杨春雷 YANG Chun-lei(CITIC Construction Co.,Ltd.,Beijing 100027,China)

机构地区：[1]中信建设有限责任公司,北京100027

出　　处：《价值工程》2024年第21期65-67,共3页Value Engineering

摘　　要：本文基于实体模型计算,探讨了不同环向预应力布束方案对斜拉桥塔锚固区混凝土应力状态的影响。经过对比分析,“井”字型布束因其施工方便、钢束应力利用率高和钢束用量小等优势被选为最优方案。此外,根据计算结果,本文提出了针对长边外侧钢束平面位置、锚固区之间竖向间距以及圆角半径的优化建议,旨在进一步提高预应力作用效果和减少防崩钢筋配束。Based on solid model calculations,this article explores the influence of different circumferential prestressing schemes on the stress state of concrete in the anchorage zone of cable-stayed bridge towers.After comparative analysis,the"well"shaped bundle was selected as the optimal solution due to its advantages of convenient construction,high stress utilization rate of steel bundles,and small steel bundle usage.In addition,based on the calculation results,this article proposes optimization suggestions for the plane position of the steel strands on the outer side of the long side,the vertical spacing between anchorage zones,and the fillet radius,aiming to further improve the effect of prestressing and reduce the reinforcement of anti collapse steel strands.

关 键 词：矮塔斜拉桥 拉索力传递 布束方案 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]