Page 244 - index

51-ɫɭɪɟɬ

ɋɨԙԑɵ ɬɟԙɞɟɭɥɟɪɞɿ ɤɨɨɪɞɢɧɚɬ ɨɫɶɬɟɪɿɧɟ ɩɪɨɟɤɰɢɹɥɚɩ, Ιɚɬɬɵ ɞɟɧɟɧɿΝ
ɠɚɡɵΙ ΙɨɡΕɚɥɵɫɵɧɵΝ ɞɢɮɮɟɪɟɧɰɢɚɥɞɵΙ ɬɟΝɞɟɭɥɟɪɿɧ ɚɥɚɦɵɡ:

xx xx o xx

¦ ¦ ¦Fsx M xC 0 ; Fsy M yC 0 ; M Cz (F ) s ICz1 M 0 ,

ɧɟɦɟɫɟ

xx ¦ Fsx , ½
°
M xC °°
¦ Fsy , ¾ (149)
xx
o°
M yC
¦ M Cz1 (F s ).¿°°
xx

I Cz1 M

Ɇɵɫɚɥ. ɋɚɥɦɚԑɵ Ɋ 4900ɇ ɠԛɤ ɛɨɥɚɬ ɚɪԕɚɧɦɟɧ ɠɨԑɚɪɵ ɤԧɬɟɪɿɥɟɞɿ (52-

ɫɭɪɟɬ). ɀԛɤ ԕɨɡԑɚɥɵɫɵɧɵԙ ԛɞɟɭɿ ɚ 6ɦ / ɫ2 . Ȼɨɥɚɬ ɚɪԕɚɧɧɵԙ ԧɡ ɫɚɥɦɚԑɵɧ
ɟɫɤɟɪɦɟɣ, ɨɧɵԙ ɫɨɡɵɥɭ ɤԛɲɿɧ (ɿɲɤɿ ɤԛɲɬɿ) ɚɧɵԕɬɚɭ ɤɟɪɟɤ.

Ȼɨɥɚɬ ɚɪԕɚɧɧɵԙ ɫɨɡɵɥɭ ɤԛɲɿ ɨɧɵԙ ɿɲɤɿ ɤԛɲɿɧɟ ɬɟԙ ɛɨɥɚɞɵ. Ɉɧɵ ɬɚɛɭ
ԛɲɿɧ Ⱦɚɥɚɦɛɟɪ ԕɚԑɢɞɚɫɵɧ ԕɨɥɞɚɧɚɦɵɡ. ɀԛɤɬɿԙ ɿɥɝɟɪɿɥɦɟɥɿ ԕɨɡԑɚɥɵɫɵɧ

o

ԕɚɪɚɫɬɵɪɚɦɵɡ. Ⱥɪԕɚɧԑɚ ԥɫɟɪ ɟɬɭɲɿ ɟɤɿ ɤԛɲɤɟ – ɫɚɥɦɚԕ ɤԛɲɿ ( P ) ɠԥɧɟ

oo

ɚɪԕɚɧɧɵԙ ɿɲɤɿ ɤԛɲɿ ( N ) – ɠԛɤɬɿԙ ɢɧɟɪɰɢɹ ɤԛɲɿɧ (Ɏ ) ԕɨɫɚɦɵɡ. ɀԛɤɬɿԙ
ɢɧɟɪɰɢɹ ɤԛɲɿ ԛɞɟɭ ɛɚԑɵɬɵɧɚ ԕɚɪɚɦɚ-ԕɚɪɫɵ ɛɚԑɵɬɬɚɥɚɞɵ, ɚɥ ɨɧɵԙ ɲɚɦɚɫɵ

Ɏ Ɋ ˜ɚ ɮɨɪɦɭɥɚɫɵɦɟɧ ɚɧɵԕɬɚɥɚɞɵ.
g

Ȼɚɪɥɵԕ ɤԛɲɬɟɪɞɿ Oz ɨɫɿɧɟ ɩɪɨɟɤɰɢɹɥɚɩ, ɨɥɚɪɞɵԙ ɠɢɵɧɵɧ ɧԧɥɝɟ
ɬɟԙɟɣɦɿɡ. ɋɨɧɞɚ

¦ Fsz P Ɏ N 0 .

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