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土建预算五金手册

2021-11-18 来源:好走旅游网
常用图形求面积、体积公式图形尺寸符号面积(F) 表面积(S) 重心(G)a-±ß³¤F=a2a=F=0.77dd=1.414a=1.414F正方形b-¶Ô½ÇÏß在对角线交点上a-¶Ì±ßb-³¤±ßF=a·bd=a2+b2在对角线交点上长方形d-¶Ô½ÇÏßh-ß·三角形1l-ÜÖ³¤2a,b,c-¶ÔÓ¦½ÇA,B,CµÄ±ß³¤bh1=absinC22a+b+cl=2F=GB=1/3BD CD=DA平行四边形a,b-Àâ±ßh-¶Ô±ß¼äµÄ¾´ÀëF=b·h=a·bsina=AC·BDsinb2对角线交点上任意四边形d1,d2-¶Ô½ÇÏßa-¶Ô½ÇÏ߼нÇd2(h1+h2)2dd=12sina2F=r-ÄÚÇÐÔ²°ë¾¶R-Íâ½ÓÔ²°ë¾¶F==pr2n2Rsin2a22正多边形a=2a-180Ro-r2Ò»±ß=an在o点上£ºn£¨n-±ßÊý£©p-Öܳ¤a-180o£ºn£¨n-±ßÊý£©=an2p-Öܳ¤d1,d2-¶Ô½ÇÏß菱形a-±ßa-ǽF=a2sina=d1d22在对角线交点上CE=ABAF=CDa=CD£¨Éϵ³±ß£©b=AB£¨Ïµ³±ß£©h-ß·梯形F=a+b·h2ha+2b·3a+bh2a+bKG=·3a+bHG=r-°ë¾¶圆形d-Ö±¾¶p-Ô²Öܳ¤1F=pr2=pd24=0.785d2=0.07958p2p=pd在圆心上椭圆形a·b-主轴F= (π/4) a·b在主轴交点G上r-°ë¾¶扇形s-»¡³¤F=s=1ar·s=pr22360G0=2rb·3sa-»¡sµÄ¶ÔÓ¦ÖÐÐĽÇr-°ë¾¶s-»¡³¤ap180±µa=900±ÊG0=42·r3p»0.6rrF==12apr(-sina)2180弓形a-ÖÐÐĽÇb-ÏÒ³¤h-·ß1[r(s-b)+bh]2ps=r·a·=0.0175r·a180r2-1a421b2G0=·12F±µa=1800±ÊG0=4r=0.4244r3ph=r-R-Íâ°ë¾¶r-Äڰ뾶D-ÍâÖ±¾¶d-ÄÚÖ±¾¶t-»²¿íF=p(R2-r2)=p22(D-d)=p·Dpjt4b-ÏÒ³¤h-s=r·a·h=r-180=0.0175r·a1a42r2-G0=4r=0.4244r3pR-Íâ°ë¾¶r-Äڰ뾶D-ÍâÖ±¾¶F=p(R2-r2)=圆环d-ÄÚÖ±¾¶t-»²¿íDpj-ƽ¾ùÖ±¾¶p22(D-d)=p·Dpjt4在圆心OR-Íâ°ë¾¶r-Äڰ뾶F==ap360(R2-r2)部分圆环D-ÍâÖ±¾¶d-ÄÚÖ±¾¶t-»²¿íRpj-Ô²»²Æ½¾ùÖ±¾¶ap180Rpj·tG0=38.2R-r33sin·R2-r2a2a2L-Á½·öÔ²ÐļäµÄ¾´Àëd-Ö±¾¶F=r2(p-P=p-pa+sina)=r2·P180新月形pa+sina180PÖµ¼ûϱíO1G=(π-P)L/2PL d/102d/10 3d/10 4d/105d/10 6d/10 7d/108d/10 9d/10P 0.400.79 1.18 1.561.91 2.25 2.552.81 3.02b-µ³±ßh-ß·l-ÇúÏß³¤S-DABCµÄÃæ»ýl=b2+1.3333h2F=24b·h=·S33抛物线形2F=K·a2a-±ß³¤Ki-ϵÊýiÖ·¶´±ßÐεıßÊýý±ÈßÐÎK3=0.433ıËßÐÎK4=1.000å±ÎßÐÎK5=1.720等多边形 ù±ÁßÐÎK6=2.598ß±ÆßÐÎK7=3.614˱°ßÐÎK8=4.828ű¾ßÐÎK9=6.182®±ÊßÐÎK10=7.694 在内、外接圆心处

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