This design is about Chongqing Wanzhou district KanKan river crossing test evaluation and reinforcement renovation. The bridge is an open spandrel stone arch bridge. After years of operating, defects arise from differ...This design is about Chongqing Wanzhou district KanKan river crossing test evaluation and reinforcement renovation. The bridge is an open spandrel stone arch bridge. After years of operating, defects arise from different parts. To verify whether the bridge meets the bearing capacity of highway grade I standard, this design firstly evaluates the bridge through the apparent diseases. Then it uses Midas/Civil to calculate the bearing capacity of lateral control section for Zhou Jiaba arch foot, L/4 and arch section. Using Midas/Civil control section load calculation, load test plan is made. In the end, by increasing cross-section method, the bridge reinforcement maintenance plan is made;that is increasing abdominal 26 cm concrete layer in the main arch ring of arch so that the bridge meets grade I highway capacity requirements.展开更多
目前大部分石拱桥建造时间较早,规范过时,设计荷载较低,已经无法满足日益增长的交通需求,其自身承载能力也在不断下降从而影响了结构的安全性。废弃旧桥建造新桥费时费力,那么采用旧危桥梁加固技术,既可以节约成本和时间,也可以保留石...目前大部分石拱桥建造时间较早,规范过时,设计荷载较低,已经无法满足日益增长的交通需求,其自身承载能力也在不断下降从而影响了结构的安全性。废弃旧桥建造新桥费时费力,那么采用旧危桥梁加固技术,既可以节约成本和时间,也可以保留石拱桥的风貌。在总结分析传统石拱桥加固方法的优缺点的基础上,介绍了超高性能混凝土(Ultra High Performance Concrete)套箍加固既有石拱桥的基本原理及方法。通过有限元模型分析了贵州长顺县摆所大桥采用UHPC加固后的拱圈整体强度变化。有限元分析表明,加固后该拱桥各主拱圈挠度验算与拱脚基础应力验算满足整体“强度-稳定”要求。展开更多
文摘This design is about Chongqing Wanzhou district KanKan river crossing test evaluation and reinforcement renovation. The bridge is an open spandrel stone arch bridge. After years of operating, defects arise from different parts. To verify whether the bridge meets the bearing capacity of highway grade I standard, this design firstly evaluates the bridge through the apparent diseases. Then it uses Midas/Civil to calculate the bearing capacity of lateral control section for Zhou Jiaba arch foot, L/4 and arch section. Using Midas/Civil control section load calculation, load test plan is made. In the end, by increasing cross-section method, the bridge reinforcement maintenance plan is made;that is increasing abdominal 26 cm concrete layer in the main arch ring of arch so that the bridge meets grade I highway capacity requirements.
文摘目前大部分石拱桥建造时间较早,规范过时,设计荷载较低,已经无法满足日益增长的交通需求,其自身承载能力也在不断下降从而影响了结构的安全性。废弃旧桥建造新桥费时费力,那么采用旧危桥梁加固技术,既可以节约成本和时间,也可以保留石拱桥的风貌。在总结分析传统石拱桥加固方法的优缺点的基础上,介绍了超高性能混凝土(Ultra High Performance Concrete)套箍加固既有石拱桥的基本原理及方法。通过有限元模型分析了贵州长顺县摆所大桥采用UHPC加固后的拱圈整体强度变化。有限元分析表明,加固后该拱桥各主拱圈挠度验算与拱脚基础应力验算满足整体“强度-稳定”要求。
