摘要
通过对桥梁体外预应力筋极限应力计算方法的评价与分析,选取与试验结果相比计算准确度较高且便于应用的计算模式;参考中国公路桥梁建设行业相关标准和准则,对相关参数进行修正,提出一种简捷、实用的体外预应力筋极限应力计算公式;给出了钢筋混凝土简支梁桥、预应力混凝土简支梁桥和连续梁桥加固设计中体外预应力筋极限应力的3个计算示例。结果表明:采用所建议的公式计算体外预应力筋的极限应力,方法可行、结果可靠。所建议的公式已纳入现行《公路桥梁加固设计规范》,可用于桥梁体外预应力法加固的设计计算。
Based on evaluation and analysis of calculation methods for ultimate stress of external prestressed tendons,a simplified calculating mode was chosen which fitted experimental result and was convenient for application.Related parameters were amended and a simple and practical formula for ultimate stress of external prestressed tendons was proposed with reference to standards and criteria of Chinese highway bridge construction industry.Three calculating demonstrations about ultimate stress of external prestressed tendons for strengthening designs of reinforced concrete simply-supported beam bridges,prestressed concrete simply-supported beam bridges and prestressed concrete continuous beam bridges were given.The results show that the recommended calculation method for ultimate stress of external prestressed tendons is practical and reliable.The recommended formula has been brought into Specification of Strengthening Design of Highway Bridges,which can be used in design and calculation of bridge strengthening by external prestressing method.
出处
《中国公路学报》
EI
CAS
CSCD
北大核心
2010年第6期78-84,共7页
China Journal of Highway and Transport
基金
交通部规范项目(2006)
关键词
桥梁工程
桥梁加固
理论分析
体外预应力
极限应力
安全系数
bridge engineering
bridge strengthening
theoretical analysis
external prestress
ultimate stress
safety factor
