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ÀÛ¼ºÀÚ Uploader : ¹Ö±âÀû ÀÛ¼ºÀÏ Upload Date: 2022-06-06º¯°æÀÏ Update Date: 2022-06-06Á¶È¸¼ö View : 651

±×¸²°ú °°ÀÌ ±æÀÌ L (m) ÀÎ ´Ü¼øº¸¿¡, 0 - P (kN) ±îÁö ÀÏÁ¤ÇÏ°Ô Áõ°¡ÇÏ´Â »ï°¢Çü ºÐÆ÷ÇÏÁßÀÌ ÀÛ¿ëÇÒ ¶§, ÀÓÀÇÀÇ ÁöÁ¡ x (m) ¿¡¼­ÀÇ Àü´Ü·Â Sfx (kN) À» ±¸ÇÑ´Ù.

A ÁöÁöÁ¡ÀÇ ¹Ý·Â RA ´Â B ÁöÁ¡¿¡¼­ ¸ð¸àÆ® ÇÕÀÌ 0 ÀÓÀ» ÀÌ¿ëÇÏ¿© ±¸ÇÑ´Ù.

RA = ((1/2)PL*(1/3)L)/L = (1/6)PL

A ·Î ºÎÅÍ x ¸¸Å­ ¶³¾îÁø °÷¿¡¼­ÀÇ Èû Px ´Â, L : P = x : Px ·Î ºÎÅÍ

Px = x*P/L

ÀÌ µÇ°í, x ÁöÁ¡¿¡¼­ÀÇ Àü´Ü·Â Sfx ´Â,

Sfx = RA - (1/2)Px*x
   = (1/6)PL - (1/2)(P/L)*x^2

ÀÌ µÈ´Ù.

Sf = 0 ÀÌ µÇ´Â À§Ä¡´Â,

(1/2)(P/L)*x^2 = (1/6)PL

x = L/sqr(3)

ÀÌ´Ù.

*** Âü°í¹®Çå[References] ***

Sfx = (1/6)*P*L - (1/2)*(P/L)*x^2
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