柱间系梁对双圆柱高墩受力影响研究

通过对40m跨T梁50m高墩有限元分析,研究柱间系梁对双圆柱桥墩受力的影响。研究表明,设置柱间系梁对桥墩顺桥向稳定、强度及配筋无有利影响,其主要作用是改善桥梁下部结构横桥向受力,略减少盖梁配筋,增加施工、成桥及抗震的横桥向安全储备;然而,一般常规双圆柱排架式盖梁桥墩,采用沿截面周边均匀配筋,顺桥向受力控制墩柱结构及配筋设计,因此,可取消柱间系梁设置。

Research on Influence of Stress of Double Cylindrical High Piers by Tie Beams

In this paper, through finite element analysis on 40m T beam for 50m high piers, research on the influence of stress of double cylindrical high piers by tie beams has been conducted. The results show that the tie beams have no beneficial effect on longitudinal stability, strength and reinforcement of high piers, and their main roles are on the improving of transverse load-earring of the double cylindrical high pier, which can slightly reduce cap beam reinforcement and need to increase transverse safety reservation on construction, completion and seis- mic status. However, considering uniform reinforcement arranged around sections, the longitudinal load-carring control high pier column structure and reinforcement design as in accordance with the conventional design for the double cylindrical trestle cap beam bridge high pier, the tie beams between the double cylindrical high pier can be cancelled.