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在水利工程中,双曲拱渡槽已被广泛采用。但在建成的工程中有不少出现了主拱圈的纵向裂缝。对此,大家较普遍地认为需要加强横向联系。目前对主拱圈的横向内力尚缺乏分析方法,而拱波、拱板断面也常因未考虑横向内力而设计得不尽合理。研究主拱圈的空间受力状态,分析横向内力更不失为一种有效的途径。横向内力按空间体系分析比较复杂,而一般渡槽跨宽比又多大于三,故可近似地分纵、横向作为平面问题来处理。本文即据此提出一种近似分析方法。
In hydraulic engineering, double curved arch aqueduct has been widely used. However, many of the completed projects have suffered longitudinal cracks in the main arch. In response, it is generally accepted that horizontal ties need to be strengthened. At present, there is still a lack of analytical methods for the horizontal internal forces of the main arch, and the arch wave and the arch section are often not designed reasonably considering the lateral internal force. It is an effective way to study the stress state of the main arch ring and analyze the horizontal internal force. Horizontal internal force analysis by space system is more complicated, but the general aqueduct span ratio and more than three, it can be approximately vertical and horizontal plane problems to deal with. This article accordingly proposed an approximate analysis method.