论文部分内容阅读
文章建立了一座钢筋混凝土葵花拱桥的空间计算模型,计算并分析了主腹拱的连接方式对葵花拱桥结构受力性能、变形性能及稳定性的影响,分析结果表明:在恒载作用下,主腹拱铰接时腹拱的结构受力较主腹拱刚接时有利,而主拱受其连接方式的影响较小;在活载作用下,主腹拱铰接时腹拱的结构受力较主腹拱刚接时有利,而主腹拱刚接时主拱的结构受力较主腹拱铰接时有利;无论是在恒载还是活载作用下,主腹拱刚接时结构的变形比较小;主腹拱无论是刚接还是铰接都不会产生失稳问题,且主腹拱刚接时稳定特征系数更高。
In this paper, the space calculation model of a reinforced concrete sunflower arch bridge is established, and the influence of the connections of the main arch arch on the stress performance, deformation performance and stability of the sunflower arch bridge is calculated and analyzed. The results show that under the action of dead load, When the abdominal arch is hinged, the structure of the abdominal arch is more favorable than that of the main abdominal arch, while the main arch is less affected by the connection mode. Under the action of live load, the structure of the abdominal arch is hindered when the main abdominal arch is hinged When the main abdominal arch is just connected, the structure of the main arch is more favorable than when the main abdominal arch is hinged. Whether the structure is under constant load or live load, the deformation of the structure is relatively small when the main abdominal arch is just connected The main abdominal arch has no instability problem either immediately or hinged, and the stability characteristic coefficient is higher when the main abdominal arch is just connected.