超高性能混凝土在简支变连续桥梁负弯矩区的应用

Application of Ultra High Performance Concrete in Negative Moment Zone of Simply Supported-Continuous Bridge

针对小箱梁或T梁桥墩顶负弯矩区的横向湿接缝的使用现状及受力特点,提出一种基于超抗裂混凝土的构件设计,如果超抗裂混凝土能取代墩顶负弯矩区预应力束,则可以有效缩短施工工期,简化施工工艺,更适合快速化、标准化、现代化施工,大大提高工程项目的经济与社会效益。

According to the application status and stress characteristics of transverse wet joints in the negative moment zone of the pier top of small box beam or T beam bridge,a component design based on super crack-resistant concrete is proposed.If the super crack-resistant concrete can replace the prestressed beam in the negative moment zone of the pier top,it can effectively shorten the construction period and simplify the construction process,which is more suitable for rapid,standardized and modern construction,and greatly improves the economic and social benefits of the project.