摘要
以某C50预应力钢筋混凝土简支T梁桥为背景,采用梁格模型计算桥梁横向分布系数,分析加宽后新桥的荷载横向分布规律和参数变化的影响作用。分析结果表明:旧T梁两侧增设小箱梁在一定程度上提高了旧T梁承受荷载的能力;小箱梁抗扭刚度对旧T梁的荷载横向分布影响不大,现浇施工时,可参照小箱梁标准图进行施工,不必进行截面优化;边箱梁与旧T梁间的横隔板数目对旧T梁的荷载横向分布影响不大,现浇施工时,可在小箱梁与旧T梁间设置三道横隔板以进一步增强桥梁的结构整体性。
Taking a C50 pre-stressed reinforced concrete simple-supported T-beam bridge as the background, the grillage model is sued to calculate the lateral distribution coefficient of bridge and to analyze the lateral distribution of the load and the effect of the parameter change of the new bridge after widened. The analysis results show that the addition of small box beams at the both sides of the old T-beam can improve the ability of the old T-beam to bear the load to a certain extent, and the torsional stiffness of the small box beam has little effect on the lateral load distribution of the old T-beam. It can be constructed with reference to the standard drawing of the small box beam during the cast-in-situ construction. No cross-section optimization is required. The number of transverse bulkheads between the side box beam and the old T-beam has little influence on the lateral load distribution of the old T girder. In cast-in-situ construction, three transverse diaphragms can be installed between the old T-beam and the small box girders so as to further strength the structural integrity of bridge.
出处
《城市道桥与防洪》
2018年第12期151-154,共4页
Urban Roads Bridges & Flood Control
基金
国家青年科学基金项目(51608137)
关键词
梁格法
小箱梁
旧T梁
荷载横向分布
grillage method
small box beam
old T-beam
lateral distribution of load
