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H鍨嬮嫾鐨勭考绶ｉ兘鏄瓑鍘氬害鐨�锛屾湁杌嬪埗鎴潰锛屼篃鏈夌敱3濉婃澘鐒婃帴绲勬垚鐨勭祫鍚堟埅闈�銆傛櫘閫氬伐瀛楅嫾閮芥槸杌嬪埗鎴潰锛岀敱浜庣敓鐢�(ch菐n)宸ヨ棟宸�锛岀考绶ｅ収(n猫i)閭婃湁1:10鍧″害銆侶鍨嬮嫾鐨勮粙鍒朵笉鍚屼簬鏅€氬伐瀛楅嫾鍍呯敤涓€濂楁按骞宠粙杓�锛岀敱浜庡叾缈肩罚杓冨涓旂劇(w煤)鏂滃害(鎴栨枩搴﹀緢灏�)锛屾晠闋堝瑷�(sh猫)涓€绲勭珛寮忚粙杓ュ悓鏅�(sh铆)閫�(j矛n)琛岃讥杌�锛屽洜姝�锛屽叾杌嬪埗宸ヨ棟鍜岃ō(sh猫)鍌欓兘姣旀櫘閫氳粙姗�(j墨)寰�(f霉)闆溿€傚湅(gu贸)鍏�(n猫i)鍙敓鐢�(ch菐n)鐨勫ぇ杌嬪埗H鍨嬮嫾楂樺害鐐�800mm锛岃秴閬�(gu貌)浜嗗彧鑳芥槸鐒婃帴绲勫悎鎴潰銆�
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鏅€氬伐瀛楅嫾鍜岃紩鍨嬪伐瀛楅嫾鐨勭考绶ｇ敱鏍归儴鍚戦倞涓婇€愭几璁婅杽鐨�锛屾湁涓€瀹氱殑瑙掑害锛屾櫘閫氬伐瀛楅嫾鍜岃紩鍨嬪伐瀛楅嫾鐨勫瀷铏�(h脿o)鏄敤鍏惰叞楂樺帢绫虫暩(sh霉)鐨勯樋鎷変集?d膩ng)?sh霉)瀛椾締(l谩i)琛ㄧず锛岃吂鏉�銆佺考绶ｅ帤搴﹀拰缈肩罚瀵害涓嶅悓鍏惰(gu墨)鏍间互鑵伴珮( h)脳鑵垮(b)脳鑵板帤(d)鐨勬鏁�(sh霉)琛ㄧず锛屽"鏅伐160脳88脳6"锛屽嵆琛ㄧず鑵伴珮鐐�160姣背锛岃吙瀵偤88姣背锛岃叞鍘氱偤6姣背鐨勬櫘閫氬伐瀛楅嫾銆�/"杓曞伐160脳81脳5"锛屽嵆琛ㄧず鑵伴珮鐐�160姣背锛岃吙瀵偤81姣背锛岃叞鍘氱偤5姣背鐨勮紩鍨嬪伐瀛楅嫾銆傛櫘閫氬伐瀛楅嫾鐨勮(gu墨)鏍间篃鍙敤鍨嬭櫉(h脿o)琛ㄧず锛屽瀷铏�(h脿o)琛ㄧず鑵伴珮鐨勫帢绫虫暩(sh霉)锛屽鏅伐16#銆傝叞楂樼浉鍚岀殑宸ュ瓧閶�锛屽鏈夊咕绋笉鍚岀殑鑵垮鍜岃叞鍘�锛岄渶鍦ㄥ瀷铏�(h脿o)鍙抽倞鍔燼 b c 浜堜互鍗€(q奴)鍒ワ紝濡傛櫘宸�32#a銆�32#b銆�32#c绛�銆傜啽杌嬫櫘閫氬伐瀛楅嫾鐨勮(gu墨)鏍肩偤10-63#銆傜稉(j墨ng)渚涢渶闆欐柟鍗�(xi茅)璀颁緵鎳�(y墨ng)鐨勭啽杌嬫櫘閫氬伐瀛楅嫾瑕�(gu墨)鏍肩偤12-55#銆�
鏈瑷�(j矛)绠楀叕寮�
婀栧窞{Q345B宸ュ瓧閶紏8#鐔遍崓閶呭伐瀛楅嫾鍚堣偉甯傞鎵硅│榛�(di菐n)娴风犊灏忓崁(q奴)鏁插畾鐩涘ぇ绀惧崁(q奴)鏈涙箹鍗楄嫅瀹夊窘鏀归€�(j矛n)琛屾斂鎳�(y墨ng)瑷� 琚ù琛屾斂姗�(j墨)闂�(gu膩n)涓嶅緱鍍呭鎵樺緥甯嚭搴俊闀�(zh菐ng)鏄熷湪鍚堣偉甯傝(di脿o)鐮斻€€銆€鍦�5锛氬喎杌嬪嵎鏉垮韩(k霉)瀛樻儏娉�
鎴潰楂樺害 H
宸ュ瓧閶�
宸ュ瓧閶�
鎴潰瀵害 B
鑵规澘鍘氬害 Tw
缈肩罚鍘氬害 Tf
浜ゆ帴鍦撳姬鍗婂緫 Rw
RA=RB=P/2
Mc=Mmax=Pl/4
fc=fmax=Pl^3/48EI
胃A=胃B=Pl^2/16EI
绗﹁櫉(h脿o)鎰忕京鍙婂柈浣�
P -- 闆嗕腑杓夎嵎锛孨;
q -- 鍧囧竷杓夎嵎锛孨;
R -- 鏀骇鍙嶅姏锛屼綔鐢ㄦ柟鍚戝悜涓婅€呯偤姝�锛孨;
M -- 褰庣煩锛屼娇鎴潰涓婇儴鍙楀锛屼笅閮ㄥ彈鎷夎€呯偤姝�锛孨m;
Q -- 鍓姏锛屽皪(du矛)閯拌繎鎴潰鎵€鐢�(ch菐n)鐢熺殑鍔涚煩娌块爢鏅�(sh铆)閲�?l猫)杈冭洏閭芥獛?锛孨;
f -- 鎾撳害锛屽悜涓嬭畩浣嶈€呯偤姝�锛宮m;
胃 -- 杞�(zhu菐n)瑙掞紝闋嗘檪(sh铆)閲�?l猫)杈冭洂顟嘍(zhu菐n)鑰呯偤姝�锛屄�;
E -- 褰堟€фā閲�锛孏pa;
I -- 鎴潰鐨勮桓鎱ｆ€х煩锛宮^4;
尉=x/l锛屛�=x'/l锛屛�=a/l锛屛�=b/l锛屛�=c/l
寰炲叐鏂归潰鑰冩叜:
锛屽緸姊佺殑鍓垏鎳�(y墨ng)鍔涜€冩叜
绗簩锛屽緸褰庢洸姝ｆ噳(y墨ng)鍔涜€冩叜銆�
寰炲瀷閶艰〃涓彲浠ユ煡鍒板畠鐨勫ぇ鍙敤鍓垏寮�(qi谩ng)搴
Tmax=Q/Ib[BH^2/8-<(B-b)h^2>/8]
寮忎腑: Tmax鐐哄ぇ鍓垏寮�(qi谩ng)搴�銆傛妸鍙敤鍓垏寮�(qi谩ng)搴浠ｉ€�(j矛n)鍘伙紝鍙畻鍑烘鐨勫ぇ鎵垮彈杓夎嵎銆�
Q鐐哄潎甯冭級鑽�
I鐐哄伐瀛楅嫾鐨勬埅闈㈡叄鐭╁彲鍦ㄥ瀷閶艰〃涓煡寰�(cm^4).
B鐐哄伐瀛楅嫾鎴潰鐨勫ぇ瀵害銆�
b鐐哄伐瀛楅嫾鎴潰鐨勫皬瀵害
h鐐哄伐瀛楅嫾灏忓搴︽埅闈㈢殑楂樺害銆�
H鐐哄伐瀛楅嫾澶у搴︽埅闈㈢殑楂樺害
姝ｆ噳(y墨ng)鍔涚殑瑷�(j矛)绠�:
Ysigma=M/W
M=澶у綆鐭�=杓夎嵎涔樿窛闆�
W=鎶楀綆妯￠噺銆�
瑷�(sh猫)Ysigma=鍏佽ū鐨勫ぇ鎳�(y墨ng)鍔�锛屽彲寰楀嚭杓夎嵎鐨勫ぇ鍊�銆�
鏅€氬伐瀛楅嫾瑕�(gu墨)鏍艰〃
W= 0.00785 脳[hd+2t ( b 鈥� d ) +0.615 ( R 2 鈥� r 2 ) ]
h= 楂�
b= 鑵块暦(zh菐ng)
d= 鑵板帤
t= 骞冲潎鑵垮帤
R= 鍏�(n猫i)寮у崐寰�
r= 绔姬鍗婂緫
姹� 250 mm 脳 118mm 脳 10mm 鐨勫伐瀛楅嫾姣� m 閲嶉噺銆傚緸閲戝爆鏉愭枡鎵嬪唺(c猫)涓煡鍑鸿┎宸ュ瓧閶� t 鐐� 13 锛� R 鐐� 10 锛� r 鐐� 5 锛屽墖姣� m 閲嶉噺 = 0.00785 脳[250 脳10+2 脳13 脳 ( 118 鈥�10 ) +0.615 脳 ( 10 2 鈥�5 2 ) ]= 41.91kg
30鐗瑰伐瀛楅嫾 鍙堢ū30鐣板伐瀛楅嫾 鎴�30t
宸ュ瓧閶�30鐗规槸灏堢偤钁槅寮忚捣閲嶆(j墨)瑷�(sh猫)瑷�(j矛)鐨勫伐瀛楅嫾锛屼笅缈肩罚鍔犲帤锛屼究浜庤懌铇嗚窇杌婂湪涓婇亱(y霉n)琛�
