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1、厚度为t=l()mm,螺栓材料为45号钢(8.8级),4=320Nmm, fc =405NmmF-4图螺栓连接示意图解:(1)抗剪:fl2n = 7(25O1O3)2+F12 =908.7103N(2)承压:z,102012 = F2F2 =400x10x20x12 =960 kn=668.2 103(后线)F =(200-3x20.5)x10x215;F3(3)净截面:12F; =(300 -220.5)10215 =556.9103V (前.线)F;=(40 x 2 + 30xl.414x4-20.5x5)xl0x215 =316.410 (折线)最终取尸5569K7V8.12、如图所示的
2、螺栓连接采用45号钢,A级8.8级螺栓,直径d = 16mm,=320Nm,广=405NtW0钢板为 钢,钢板厚度12mm,抗拉强度设图螺栓连接示意图解:(1)抗剪:f; =102-132320 = 2612103N承压 J=20203405 = 2106l0(3)净截面:F3 =215 (320 -61.5)20 = 1112 103TV选用max= 1112 kn值。计值/ = 21577/加层。求此连接能承受的皿若用M16替M20,则:Fl = 82 13 2250 =1.306 106TVF2 =201613 400 =1.6641067VF3 = 215 (320-49.5)20 =
3、 1.163 106TV选用 1163KNo8.13、P269-8.13:解:单个高强蛛粒摩擦型连接的受剪祇段力N: = 0.9%= 0.9203155 = 83.7 kN连接一侧螺阶所能承受的力F = nN: = 13x83.7 = 1088JtV连接件(或被连接件)自身强度由连接构造可知,连接件的总月度,= 12x2 = 24,而被连接件的总月度1 = 20“.故构件最危险的械面应为被连接件1-1械面或22械面分别如下图所示)由1-1根面的强度8.14.下图梁的拼接用高强度螺栓承压型连接,F=200kN,构造如下图所示,高强度螺栓的钢材为109级,梁的钢板用Q235B,螺栓M20,梁连接处
4、的接触面采用喷砂处理,螺栓的强度设计值广 10 / n, c 7O2V / hm o(1)确定翼缘接头处螺栓数FI和连接板尺寸;(2)验算腹板拼接螺栓是否满足要求。,1 = fdAn = 205 (60 4 40 2 -16 3) 20 = 1115.2tV考虑摩擦壁遥接孔前传力/: = /, (1 -0.5nl)= F =I -0.5nln1115.2/八.r-=1260.7fcV1-O,533由2 2技面的强度F; 2 = A = 205(60602 4402-165)20 = 1391.6A考虑摩擦型连接孔前传力I -0.5n1n1391.6l-O.5V3=7229kN综上所述,该连接所
5、能承受的外荷战llil =nin(l 088.1 1260.7 1722.9)= 1088. U.VN: = 0.9%= 0.9203155 = 83.7 kN连接一侧螺阶所能承受的力F = nN: = 13x83.7 = 1088JtV连接件(或被连接件)自身强度由连接构造可知,连接件的总月度,= 12x2 = 24,而被连接件的总月度1 = 20“.故构件最危险的械面应为被连接件1-1械面或22械面分别如下图所示)由1-1根面的强度,1 = fdAn = 205 (60 4 40 2 -16 3) 20 = 1115.2tV考虑摩擦壁遥接孔前传力/: = /, (1 -0.5nl)= F
6、=I -0.5nln1115.2/八.r-=1260.7fcV1-O,533由2 2技面的强度F; 2 = A = 205(60602 4402-165)20 = 1391.6A考虑摩擦型连接孔前传力I -0.5n1n1391.6l-O.5V3=7229kN综上所述,该连接所能承受的外荷战llil =nin(l 088.1 1260.7 1722.9)= 1088. U.VN: = 0.9%= 0.9203155 = 83.7 kN连接一侧螺阶所能承受的力F = nN: = 13x83.7 = 1088JtV连接件(或被连接件)自身强度由连接构造可知,连接件的总月度,= 12x2 = 24,而
7、被连接件的总月度1 = 20“.故构件最危险的械面应为被连接件1-1械面或22械面分别如下图所示)由1-1根面的强度,1 = fdAn = 205 (60 4 40 2 -16 3) 20 = 1115.2tV考虑摩擦壁遥接孔前传力/: = /, (1 -0.5nl)= F =I -0.5nln1115.2/八.r-=1260.7fcV1-O,533由2 2技面的强度F; 2 = A = 205(60602 4402-165)20 = 1391.6A考虑摩擦型连接孔前传力I -0.5n1n1391.6l-O.5V3=7229kN综上所述,该连接所能承受的外荷战llil =nin(l 088.1
8、 1260.7 1722.9)= 1088. U.VN: = 0.9%= 0.9203155 = 83.7 kN连接一侧螺阶所能承受的力F = nN: = 13x83.7 = 1088JtV连接件(或被连接件)自身强度由连接构造可知,连接件的总月度,= 12x2 = 24,而被连接件的总月度1 = 20“.故构件最危险的械面应为被连接件1-1械面或22械面分别如下图所示)由1-1根面的强度,1 = fdAn = 205 (60 4 40 2 -16 3) 20 = 1115.2tV考虑摩擦壁遥接孔前传力/: = /, (1 -0.5nl)= F =I -0.5nln1115.2/八.r-=12
9、60.7fcV1-O,533由2 2技面的强度F; 2 = A = 205(60602 4402-165)20 = 1391.6A考虑摩擦型连接孔前传力I -0.5n1n1391.6l-O.5V3=7229kN综上所述,该连接所能承受的外荷战llil =nin(l 088.1 1260.7 1722.9)= 1088. U.VN: = 0.9%= 0.9203155 = 83.7 kN连接一侧螺阶所能承受的力F = nN: = 13x83.7 = 1088JtV连接件(或被连接件)自身强度由连接构造可知,连接件的总月度,= 12x2 = 24,而被连接件的总月度1 = 20“.故构件最危险的械
10、面应为被连接件1-1械面或22械面分别如下图所示)由1-1根面的强度,1 = fdAn = 205 (60 4 40 2 -16 3) 20 = 1115.2tV考虑摩擦壁遥接孔前传力/: = /, (1 -0.5nl)= F =I -0.5nln1115.2/八.r-=1260.7fcV1-O,533由2 2技面的强度F; 2 = A = 205(60602 4402-165)20 = 1391.6A考虑摩擦型连接孔前传力I -0.5n1n1391.6l-O.5V3=7229kN综上所述,该连接所能承受的外荷战llil =nin(l 088.1 1260.7 1722.9)= 1088. U.V