6.1
.
鐭╁舰鎴潰鎮噦姊佸鍥炬墍绀猴紝宸茬煡
l
=
4
m
锛?/p>
b / h
=
2/3
锛?/p>
q
=
10
kN/m
锛?/p>
[
飥?/p>
]=
10
MPa
锛岃瘯纭畾姝ゆ妯埅闈㈢殑灏?
瀵搞�?/p>
瑙ｏ細
(1)
鐢绘鐨勫集鐭╁浘
鐢卞集鐭╁浘鐭ワ細
(2)
璁＄畻鎶楀集鎴潰绯绘暟
(3)
寮哄害璁＄畻
6.2. 20a
宸ュ瓧閽㈡鐨勬敮鎵垮拰鍙楀姏鎯呭喌濡傚浘鎵�绀猴紝鑻?/p>
[
飥?/p>
]=
160
MPa
锛岃瘯姹傝鍙浇鑽枫�?/p>
瑙ｏ細
(1)
鐢绘鐨勫集鐭╁浘
鐢卞集鐭╁浘鐭ワ細
(2)
鏌ヨ〃寰楁姉寮埅闈㈢郴鏁?/p>
(3)
寮哄害璁＄畻
鍙栬鍙浇鑽?/p>
6.3.
鍥剧ず鍦嗚酱鐨勫浼搁儴鍒嗙郴绌哄績杞淬�傝瘯浣滆酱寮煩鍥撅紝骞舵眰杞村唴鏈�澶ф搴斿姏銆?/p>
瑙ｏ細
(1)
鐢绘鐨勫集鐭╁浘
鐢卞集鐭╁浘鐭ワ細鍙兘鍗遍櫓鎴潰鏄?/p>
C
鍜?/p>
B
鎴潰
(2)
璁＄畻鍗遍櫓鎴潰涓婄殑鏈�澶ф搴斿姏鍊?/p>
C
鎴潰锛?/p>
B
鎴潰锛?/p>
(3)
杞村唴鐨勬渶澶ф搴斿姏鍊?/p>
6.5.
鎶婄洿寰?/p>
d
=1 m
鐨勯挗涓濈粫鍦ㄧ洿寰勪负
2 m
鐨勫嵎绛掍笂锛岃
E
=200 GPa
锛岃瘯璁＄畻閽笣涓骇鐢熺殑鏈�澶ф搴斿姏銆?/p>
瑙ｏ細
(1)
鐢遍挗涓濈殑鏇茬巼鍗婂緞鐭?/p>
(2)
閽笣涓骇鐢熺殑鏈�澶ф搴斿姏
6.8.
鍘嬫澘鐨勫昂瀵稿拰杞借嵎濡傚浘鎵�绀恒�傛潗鏂欎负
45
閽紝
飥?/p>
s
=
380 MPa
锛屽彇瀹夊叏绯绘暟
n=1.5
銆傝瘯鏍℃牳鍘嬫澘鐨勫己搴︺�?/p>
瑙ｏ細
(1)
鐢绘鐨勫集鐭╁浘
鐢卞集鐭╁浘鐭ワ細鍗遍櫓鎴潰鏄?/p>
A
鎴潰锛屾埅闈㈠集鐭╂槸
(2)
璁＄畻鎶楀集鎴潰绯绘暟
(3)
寮哄害璁＄畻
璁哥敤搴斿姏
寮哄害鏍℃牳
鍘嬫澘寮哄害瓒冲銆?/p>
6.12.
鍥剧ず妯埅闈负鈯ュ舰鐨勯摳閾佹壙鍙楃函寮洸锛屾潗鏂欑殑鎷変几鍜屽帇缂╄鐢ㄥ簲鍔涗箣姣斾负
[
飥?/p>
t
]/[
飥?/p>
c
]=1/4
銆傛眰姘村钩缈肩紭鐨?
鍚堢悊瀹藉害
b
銆?/p>
瑙ｏ細
(1)
姊佹埅闈笂鐨勬渶澶ф媺搴斿姏鍜屾渶澶у帇搴斿姏
q
l
b
h
20
38
A
A
蠁
12
20
30
P
1
=15.4kN
A-A
A
P
P
B
D
C
2m
2m
2m
No20a
M
2
P
/3
2
P
/3
x
(+)
(-)
400
800
200
300
5kN
3kN
3kN
蠁
60
蠁
45
A
C
D
B
E
M
1.34kNm
x
(+)
(-)
0.9kNm
M
308Nm
x
(+)
M
ql
2
/2
(-)
x
400
30
60
z
C
C
M
M
y
1