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U形薄壳渡槽应力分析比较繁杂,各种简化计算方法很多,其中武汉水院的折板分析法电算成果比较突出,尤其对跨宽比小于3的拱上短跨度壳槽,给出了较高精度的解答。对于跨宽比大于3时,虽也给出了部分解答,在实用中仍感到有某些不便之处。为能迅速查出设计所需要的主要参数,本丈提供一些自成体系的表格,供设计时选用,达到提高工效的目的,现分述如下: 一,壳槽的型号本文编制的薄壳渡槽定型表格包括三种壳槽型号,半园1型,半园2型,半园4型,其主要区别如下: 半园1型h=0.4R, b=0.2R. 半园2型h=0.6R, b=0.2R. 半园4型h=1.0R, b=0.25R. h是壳槽直段高度,b是边梁高度,R是壳槽平均半径,其他区别详见表2—1,2—2,
The stress analysis of the U-shaped thin-walled aqueduct is complicated, and various simplifications are calculated. Among them, the computational results of the folded-plate analysis method of Wuhan Water Institute are outstanding. Especially for short-span domes with a span-width ratio of less than 3, More accurate solution. Although some answers are given for a span ratio greater than 3, some inconveniences remain in practice. In order to quickly identify the main parameters required for the design, the Zhang provide some form of self-contained system for design selection, to achieve the purpose of improving ergonomics, are as follows: First, the shell of the shell model of the preparation of the shell aqueduct The semi-circular type 1, semi-circular type 2 and semi-circular type 4 have the following main differences: Semi-circular type 1 h = 0.4R, b = 0.2R. R, b = 0.2R. Half Park type h = 1.0R, b = 0.25R. H is the shell straight section height, b is the side beam height, R is the average shell radius, the other differences in Table 2-1 , 2-2,