Vízügyi Közlemények, 1953 (35. évfolyam)

2. szám - XI. Kisebb közlemények

(40). The stiffness of the border of the cylindrical wall against rotation is — similarly 12 (1 — u

2) to circular plates — characterized by — times the ratio : MJ&, and this is called stiffness factor. According to different conditions of support the values of the stiffness factor are given by formulae (85 — 90). The numerical values of variables (k

9 u) can be read of table XII. and also from diagram 12. 6. Cases of application of the cylindrical ivall In fig. 18. some tank designs are sketched, composed of circular or annular plates and cylindrical walls. The calculation of these can be executed entirely, or at least in parts, by the method shown. No water tower tank is presented, because the support of these is usually not circle-symmetrical. In the last case, of course, tbe principles above said can be applied according to their sense. In the case of high water columns (Л> 6) further simplifications are possible in the formulae derived, namely sh l ЯЙ ch X. 7. Application of the calculation method; examples The initial fixed-end moment is regarded as positive if the loading tends to rotate clockwise the structural parts joining the border of the cylinder (border of circular plate). The sense of rotation is determined for the part of the frame left of the centre axis, and the calculation is also executed only there. Because of symmetry moment distribution is effected on circular plates only for radial moments (M

r), on cylindrical side walls only for moments M

y. Tangential moments (M

z) and ring forces (N<p) are determined from the loading and the radial support moments mund by moment distribution. The method of calculation is otherwise identical with the routine procedure used in the analysis of frames. A) First example To be determined the moment and ring force diagrams of the cylindrical side wall in fig. 19. The diagrams are determined with aid of graph 1. (fig. 20.). B) Second example The cylindrical wall presented in the first example joins a reinforced concrete base plate (fig. 21.) Uniformly distributed soil reaction supposed (fig. 22.), the moment and force diagrams are to be determined. Calculation is made in tabular form. Moments M

r, M

t, M

y ánd force N

c

p are given in fig. 23. C) Third example Ring force and moment diagrams of the single-compartment'reinforced concrete drinkwater storage tank of 1500 m

3 serviceable capacity to be determined. The frame structure is illustrated in fig. 25., the loading in fig. 26. The moment distribution is executed in fig. 27. and 28. beside the sketch of the frame. The diagrams of moments and forces are given in fig. 29. and 30. D) Fourth example In the following the moment and force diagrams of a storage tank of 2000 m

3 serviceable capacity, divided by a concentrical wall into two equal compartments, are determined. The sketch of the frame is presented in fig. 32., the loading in fig. 33. The calculation is made in tabular form here too. Moments M

r, M

t, M

y and force N<p are presented in fig. 36 and 37. ГРАФИЧЕСКОЕ ИЗОБРАЖЕНИЕ ВОДОХОЗЯЙСТВА ЗАВОДОВ N Han. : Др. К. Болбериц (Рисунки см. на 394—403 стр. венгерского текста) ОДТ. 628.17.001.13 Для обеспечения экономичного водохозяйства заводов необходимы подробные данные не только о количестве и распределении водотребования, о времени и величине максимумов, но также о физических, химических и бактериологических характеристиках использованной воды и о потребуемых напорах. Такое множество исходных данных очень неудобно при расчетах, поэтому весьма выгодным является наглядное изображение, которое содержит все данные необходимые при водохозяйственных рассуждениях.