复合主拱圈加固技术应用计算分析  

Computational Analysis on Application of Reinforcement Technology for Compound Main Arch Ring

作　　者：惠兴智[1] HUI Xing-zhi(Shanxi Transportation Research Institute, Taiyuan 030006, China)

机构地区：[1]山西省交通科学研究院,太原市030006

出　　处：《北方交通》2016年第12期16-19,共4页Northern Communications

摘　　要：针对目前加固设计规范中采用的极限状态法无法反应混凝土的材料非线性、收缩徐变以及二次受力应力应变滞后现象,依托实际工程,对石拱桥复合主拱圈加固计算进行了探讨,依据石拱桥复合主拱圈加固计算的基本假定,对该桥采用软件进行了有限元建模分析。结果表明,有限元建模能够模拟出复合主拱圈加固施工的全过程以及砌体原拱圈与加固层混凝土的粘结效应,能够一定程度上解决加固设计极限状态法存在的上述缺陷。Aiming at the hysteresis phenomenon that limit state method adopted in reinforcement design specifications at present fails to reflect the material nonlinearity of concrete, concrete shrinkage and creep and secondary load - carrying stress - strain, relying on practical engineering, the discussion on reinforcement calculation of compound main arch ring of stone arch bridge is made. Basing on the fundamental assumption of reinforcement calculation of compound main arch ring of stone arch bridge, the finite element modeling analysis on this bridge is made by adopting Midas Civil software. The result shows that the finite element modeling can simulate the overall process of compound main arch ring reinforcement construction and bonding effect of original arch ring of brickwork and concrete of reinforcement layer, so as to solve the above defect existed in limit state method of reinforcement design at a certain extent.

关 键 词：复合主拱圈 石拱桥 极限状态法 有限元 

分 类 号：U445.72[建筑科学—桥梁与隧道工程]