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prof. Svetko Lapajne, ing.

Csonkova metoda obremenitvami računanja skeletov s horizontalnimi obremenitvami

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CSONKA’S METHOD

CSONKA’S METHOD Summary
Mr. Csonka, Profesor of the University of Budapest has established a new method for statical analysis of multistorey frameworks for a horizontal loading. The basis consists of a system of columns rigidly fixed on top and bottom which oppose a determined sway with certain shear forces. Relaxing the joints according to Cross’s method a considerable part of shear forces is lost. Thus Mr. Csonka is searching for a manner of moment distribution so, as the shear forces on columns would not be reduced. This is possible only if the rotations of joints are accompanied by an additional side sway of storeis above and below the joints. This is the Csonka’s sway: the columns yield in form of a circle with a constant bending moment and remain without any additional shear forces.
The numerical operation is accomplished in a similar way ais in Cross’si method. Each bending moment distribution refers to a row of beams and adjacent two rows of columns. The stiffnesses of girders are 3fa of the normale ones, the stiffnesses of columns are only / of the same. The carry-over factor is — 1, applied only on columns. In addition to the Csonka’s sway a supplement Cross’s proceeding for rotations-differences is necessairy, because all joints of one storey do not have the same rotations.
The technical proceedings of calculus are possible according to Mr. Csonka in several different manners. The author of this article recommends a longer, but clearer way of them so, that the Gsonka’s sway remains wholy separated of the adjacent Cross’s moment-distribution. The Csonka’s proceedings are very useful, though relatively little known. The aim of the article is to extend its use among the engineers of this country.

Summary

Mr. Csonka, Profesor of the University of Budapest has established a new method for statical analysis of multistorey frameworks for a horizontal loading. The basis consists of a system of columns rigidly fixed on top and bottom which oppose a determined sway with certain shear forces. Relaxing the joints according to Cross’s method a considerable part of shear forces is lost. Thus Mr. Csonka is searching for a manner of moment distribution so, as the shear forces on columns would not be reduced. This is possible only if the rotations of joints are accompanied by an additional side sway of storeis above and below the joints. This is the Csonka’s sway: the columns yield in form of a circle with a constant bending moment and remain without any additional shear forces.

The numerical operation is accomplished in a similar way ais in Cross’si method. Each bending moment distribution refers to a row of beams and adjacent two rows of columns. The stiffnesses of girders are 3fa of the normale ones, the stiffnesses of columns are only / of the same. The carry-over factor is — 1, applied only on columns. In addition to the Csonka’s sway a supplement Cross’s proceeding for rotations-differences is necessairy, because all joints of one storey do not have the same rotations.

The technical proceedings of calculus are possible according to Mr. Csonka in several different manners. The author of this article recommends a longer, but clearer way of them so, that the Gsonka’s sway remains wholy separated of the adjacent Cross’s moment-distribution. The Csonka’s proceedings are very useful, though relatively little known. The aim of the article is to extend its use among the engineers of this country.

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