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銆€銆€(涓€)Mu < 1.2Mp浣曟剰?濡備綍瑙f焙?
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銆€銆€Mu 鈮� 1.2Mp---(8.2.8-1)
銆€銆€寮忎腑锛歁u-姊佷笂涓嬬考绶e叏鐔旈€忓潯鍙g剨绺殑妤甸檺鍙楀綆鎵胯級鍔�锛屽叾瑷�(j矛)绠楀叕寮忕偤锛�
銆€銆€Mu =Af(h-tf)fy
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銆€銆€Mp =Wpfy
銆€銆€Wp-妲�(g貌u)浠舵埅闈㈠鎬ф姷鎶楃煩
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銆€銆€鈶燤(f猫i)u涓昏鑸囨缈肩罚鏉块潰绌嶅拰姊侀珮鏈夐棞(gu膩n)锛岃垏姊佽吂鏉垮帤鐒¢棞(gu膩n);
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銆€?銆佸儹璇硅嵎鑸蜂贡鐮'骞栨湁銊愪紵?濡傚湒2鎵€绀�锛屽湒鐣�)銆傞€氶亷鍦ㄦ绔笂涓嬬考绶h檿鍔犳褰㈡澘锛屽澶у叏鐔旈€忓潯鍙g剨绺殑闀�(zh菐ng)搴�锛屽緸鑰屽鍔犱簡鐒婄斧鐨勬サ闄愭姉褰庢壙杓夊姏銆�
銆€銆€浠ユ湰宸ョ▼鐐轰緥锛岃ō(sh猫)妤斿舰鏉挎寫鍑洪暦(zh菐ng)搴︾偤0.08m锛屾牴鎿�(j霉)鍏紡(1)锛�
銆€銆€Mu=0.08脳(0.15+0.016)脳(0.25-0.008)脳4.7脳105=151.05kn-m>1.2Mp=145.73kn-m
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銆€?銆佽鑽疯埛涔辩牠澹栨湁銊愮磰w鏉�(濡傚湒3鎵€绀�锛屽湒鐣�)
銆€銆€閫氶亷鍦ㄦ绔笂涓嬬考绶h檿鍔犳褰㈣搵鏉匡紝澧炲ぇ鍏ㄧ啍閫忓潯鍙g剨绺殑楂樺害锛屽緸鑰屽鍔犱簡鐒婄斧鐨勬サ闄愭姉褰庢壙杓夊姏銆�
銆€銆€浠ユ湰宸ョ▼鐐轰緥锛岃ō(sh猫)妤斿舰钃嬫澘鏉垮帤鐐� 0 008m锛屾牴鎿�(j霉)鍏紡(1)锛�
銆€銆€Mu=(0.008+0.006)脳0.15脳(0.25-0.008)脳4.7脳105=238.85kn-m>1.2Mp=145.73kn-m
銆€銆€婊胯冻瑕�(gu墨)鑼冭姹�
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銆€?銆侀厓楗瑺?濡傚湒4鎵€绀�锛屽湒鐣�)
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銆€?銆佸,椴滈媹類燦閫f帴鏂规硶鐨勯仼鐢ㄦ浠躲€�
銆€銆€涓婅堪涓夌ó瑷�(sh猫)瑷�(j矛)鏂规硶涓昏鐢ㄤ簬姊佹煴鍓涙€ч€f帴锛屽皪(du矛)浜庢鏌遍壐鎺ラ€f帴鐨勭瘈(ji茅)榛�(di菐n)锛岀敱浜庡叾閫f帴鏂瑰紡涓嶅爆浜庘€滃挤(qi谩ng)閫f帴寮辨(g貌u)浠垛€濓紝鍥犳涓嶉渶瑕侀€�(j矛n)琛屽湴闇囩祫鍚堜綔鐢ㄤ笅鐨勬サ闄愭姉褰庢壙杓夊姏椹�(y脿n)绠�銆�
銆€銆€(浜�)绡€(ji茅)榛�(di菐n)鍩熶笉婊胯冻瑕佹眰浣曟剰?濡備綍瑙f焙?
銆€?銆佷箵?gu墨)鑼冭姹傦細鏍规摎(j霉)銆婃姉闇囪(gu墨)鑼冦€嬬8.2.5姊濈2娆剧殑瑕�(gu墨)瀹氾細绡€(ji茅)榛�(di菐n)鍩熺殑灞堟湇鎵胯級鍔涙噳(y墨ng)绗﹀悎涓嬪紡瑕佹眰锛�
銆€銆€[唯(Mpb1+Mpb2)/Vp]鈮(4/3)fv]----(8.2.5-2)
銆€銆€宸ュ瓧褰㈡埅闈㈡煴锛歏p=hbhcbtw----(8.2.5-3)
銆€銆€銆婃姉闇囪(gu墨)鑼冦€嬬8.2.5姊濈3娆剧殑瑕�(gu墨)瀹氾細宸ュ瓧褰㈡埅闈㈡煴鍜岀褰㈡埅闈㈡煴鐨勭瘈(ji茅)榛�(di菐n)鍩熸噳(y墨ng)鎸変笅鍒楀叕寮忛(y脿n)绠楋細
銆€銆€tw鈮�(hb+hb)/90-----(8.2.5-5)
銆€銆€[唯(Mb1+Mb2)/Vp]鈮(4/3)fv/纬RE]----(8.2.5-6)
銆€銆€寮忎腑锛孧pb1+Mpb2--鍒嗗垾鐐虹瘈(ji茅)榛�(di菐n)鍩熷叐鍋�(c猫)姊佺殑鍏ㄥ鎬у彈褰庣煩鎵胯級鍔�;
銆€銆€Mb1+Mb2--鍒嗗垾鐐虹瘈(ji茅)榛�(di菐n)鍩熷叐鍋�(c猫)姊佺殑褰庣煩瑷�(sh猫)瑷�(j矛)鍊�;
銆€銆€Vp--绡€(ji茅)榛�(di菐n)鍩熺殑楂旂⿳銆�
銆€銆€閫氶亷閶肩祼(ji茅)妲�(g貌u)鐨勭瘈(ji茅)榛�(di菐n)閫f帴瑷�(j矛)绠楁垜鍊戝緱鐭�锛屽叕寮�(8.2.5-2)鍜�(8.2.5-5)涓嶆豢瓒宠姹傜殑鏈€澶�锛屽叕寮�(8.2.5-6)涓€鑸純瀹规槗婊胯冻瑕佹眰銆備粩绱�(x矛)鍒嗘瀽閫欎笁鍊�(g猫)鍏紡鐨勫叿楂斿惈缇�锛屾垜鍊戜笉闆e緱鍑轰互涓嬬祼(ji茅)璜栵細
銆€?銆佷繜顐�?8.2.5-2)涓昏椹�(y脿n)绠楃殑鏄瘈(ji茅)榛�(di菐n)鍩熺殑灞堟湇鎵胯級鍔�锛屽叾澶у皬鍙垏妲�(g貌u)浠剁殑鎴潰澶у皬绛夋湰韬€ц唱(zh矛)鏈夐棞(gu膩n)锛岃€岃垏澶栧姏鐒¢棞(gu膩n)銆�
銆€?銆佽癄顐�?8.2.5-5)鑸�(8.2.5-2)涓€妯�锛屼篃鏄彧鑸囨(g貌u)浠剁殑鎴潰澶у皬鏈夐棞(gu膩n)鐨勭墿鐞嗛噺锛岃€岃垏澶栧姏鐒¢棞(gu膩n)銆�
銆€?銆侀厓顐�?8.2.5-6)涓昏鏄(y脿n)绠楃瘈(ji茅)榛�(di菐n)鍩熷叐鍋�(c猫)姊佺殑绔綆鐭╀箣鍜屾墍鐢�(ch菐n)鐢熺殑寮�(qi谩ng)搴︽噳(y墨ng)鍔涜婊胯冻瑕�(gu墨)鑼冪殑鍏佽ū闄愬€�銆傚鏋滃収(n猫i)鍔涗笉鏄緢澶�锛屼竴鑸儏娉佷笅閮借兘婊胯冻瑕佹眰銆�
銆€?銆佷箳銇撹檼?sh铆)渚嬶細鍦�1绲�(ji茅)妲�(g貌u)骞抽潰鍦�(鍦栫暐)
銆€銆€宸ュ瓧褰㈡1鍜屾2鏂烽潰灏哄鐐猴細B脳H脳tw脳tf=150脳250脳4.5脳8
銆€銆€宸ュ瓧褰㈡煴1鏂烽潰灏哄鐐�;B脳H脳tw脳tf=175脳350脳6脳81
銆€銆€灏囦笂杩板悇鍙冩暩(sh霉)浠e叆鍏紡(8.2.5-2)涓緱
銆€銆€[唯(Mpb1+Mpb2)/Vp]=362.56>[(4/3)fv]=240
銆€銆€涓嶆豢瓒宠(gu墨)鑼冭姹�
銆€銆€tw=6<(hb+hc)/90=6.3
銆€銆€涔熶笉婊胯冻瑕�(gu墨)鑼冭姹�
銆€銆€鈶剁瘈(ji茅)榛�(di菐n)鍩熺殑妲�(g貌u)閫犳帾鏂斤細
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