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λã > ɹ > ຣwģW(wng)ʩY(ji)(gu)|(zh)...ຣwģW(wng)ʩY(ji)(gu)|(zh)
䓽ӋҎ(gu)t
1䓽(yng)^(q)eF(xin)A(y)Ƙ(gu)ͬ䓷NҎ(gu)քeO(sh)ӋLȳԆλԇӋ
2Ӌ䓽rO(sh)ӋҎ(gu)䓽LȵҎ(gu)LӋO(sh)ӋδҎ(gu)LȵѰ䓽ēp֮(ni)ӋLȡ䓽ͲDȽ^ԂӋ㡣
3ȏA(y)(yng)䓽(gu)γߴӋLA(y)(yng)䓽O(sh)ӋDҎ(gu)A(y)(yng)䓽A(y)Lȣ^(q)eͬ^քeҎ(gu)Ӌ㣺
1)ͺϽ䓽ɶ˲ݗU^ߕrA(y)(yng)䓽A(y)LȜp0.35mݗUӋ
2ͺϽ䓽һ˲û^ƬһݗU^ߕrA(y)(yng)䓽LȰA(y)LӋݗUӋ
3ͺϽ䓽һ˲û^Ƭһ˲Î͗l^ߕrA(y)(yng)䓽0. 15mɶ˲Î͗l^ߕrA(y)(yng)䓽0.3mӋ
4ͺϽ䓽ú^rA(y)(yng)䓽L0. 35mӋ
5ͺϽ䓽䓽gJM XM QM^߿L20mԃ(ni)rA(y)(yng)䓽LlmL20mϕrA(y)(yng)䓽L1.8mӋ
6̼䓽zF^ߣL20mԃ(ni)rA(y)(yng)䓽LlmL20mϕrA(y)(yng)䓽L18m.
7̼䓽zɶ˲煴^rA(y)(yng)䓽zL0. 35mӋF(xin)ʼnĹӋҎ(gu)tʽ
1F(xin)ܽY(ji)(gu)ļӋ㷽Dʾߴm3Ӌ(yng)۳Tڼ0.3m2ռweӋ㹫ʽVLߡ0.3m2Te
ʽУL≦L(ni)L(ni)߾(c) ߡԻA(ch)ϱDҎ(gu)䓽ĩҪ1800 1350 900^rAֱD(yng)С䓽ֱd2.5ƽֱLȲС䓽ֱd3HRRB335HRB400䓽ď(ni)(yng)С䓽ֱd4^ƽֱLȑ(yng)O(sh)ӋҪ 1800ÿ^L=6.25 d( d䓽ֱmm)
A(ch)ӋҎ(gu)tʽ
≦lλA(ch)Ĺ≦lλA(ch)ľLȡlλA(ch)Ľe
(ni)lλA(ch)Ĺ(ni)lλA(ch)LLȡlλA(ch)Ľe
ע⣺LӋ㑪(yng)ŗlλA(ch)ֱбӃLӋ
2MûA(ch)Ӌ㼰ʽ
MûA(ch)=MûA(ch)eMûA(ch)װ崹ֱֺȣϲ_we
3A(ch) ŪA(ch)cڻA(ch)ϱֽ磩
(1)λA(ch) V=L
(2)AλA(ch) V=ƸA(L)
(3)^FλA(ch) V=V1+V2=1/6 h1 AB+A+aB+b+ab+ABh2
V1A(ch)ϲ_weV2A(ch)²Lwweh1_߶AB_߅Lab_߅Lh2A(ch)²Lw߶
ӋҎ(gu)tʽ
š(gu)Ӌ
٘(gu)we(gu)we+Rwe=HAB+0.03bn
ʽУH(gu)߶ AB(gu)L b(gu)cuҧ1/2 nR߅(sh)
٬F(xin)O(sh)ӋDʾߴweӋ۳(gu)(ni)䓽A(y)Fռwe
wee*
ߣ
a (yng)ϱ(ǰϱ)һӘǰ±֮gĸ߶Ӌ㡣
b o(yng)ϱ(ǰϱ)ñ±֮gĸ߶Ӌ
c (yng)ϱ픸߶Ӌ
d A(y)ƻO(sh)ӋDʾߴweӋ㣬۳(gu)(ni)䓽A(y)Fռweţ(yng)weӋ
䓽Ҏ(gu)t
1һӋ㹫ʽĽe*LȰO(sh)ӋDʾߴweӋ۳(gu)(ni)䓽A(y)Fռwe뉦(ni)^|we(ni)
2Lȡ
cBӕrL(c)棬cBӕrL(c)档
3Ȧ
≦ȦĹ≦ȦľLȡȦĽe
(ni)ȦĹ(ni)ȦLLȡȦĽe 䓽ĹӋ
1һF(xin)Ӌ㷽F(xin)尴O(sh)ӋDʾߴweӋ۳(gu)(ni)䓽A(y)Fe0.3m2ԃ(ni)ĿռweӋ㹫ʽVL匒
2ϵָcF(xin)һw乤weӋ(c)we֮Ӌ
3oϵֱָñ֧εİ塣wecñweӋ
4ƽָoֱɉ֧εİ塣乤匍weӋ
3A(ch)we
Ӌ㷽A(ch)we=ăLă
䓽ӋLȵĴ_
䓽L=(gu)Dʾߴ磭oӿ+ɶˏ^L+DעĴL䓽бLֵ
ʽбoӺ䓽^L䓽L䓽бLֵԼN䓽O(sh)ӋLȵӋ㹫ʽҊ£
1䓽űoӺ
䓽űoӺ(yng)O(sh)ӋҪO(sh)ӋowҪr(yng)С䓽ֱ(yng)±Ҫ
2̎҃(ni)h(hun)ɹSa(chn)A(y)Ƙ(gu)ŏȵȼC20ʩ|(zh)пɿCr䱣oӺȿɰҎ(gu)p5mmA(y)Ƙ(gu)еA(y)(yng)䓽ıoӺȲ(yng)С15mm̎¶҃(ni)ߝȭh(hun)A(y)Ƙ(gu)ˮɰ{Ĩ|(zh)ɿCʩr䱣oӺȿɰ҃(ni)h(hun)еĘ(gu)ıoӺȔ(sh)ֵá
3䓽(gu)䓽^ıoӺһ10mmA(y)ƵΰߵıoӺȿɰ]
䓽^LָN(gu)̎˴˵䓽(yng)^̵L
O(sh)ӋD_Ҏ(gu)䓽^LȰDӋ㣻O(sh)ӋowҪrtY(ji)(gu)O(sh)ӋҎ(gu)Ҏ(gu)Ӌ
GB500102002Ҏ(gu)Ҏ(gu)
1䓽^L
䓽^Lȑ(yng)йʽӋ㣺
ͨ䓽 La=a(fy / ft)d
A(y)(yng)䓽 La=a(fpy / ft)d
ʽ fy fpy ͨ䓽 A(y)(yng)䓽ĿO(sh)Ӌֵ
ft SĿO(sh)ӋֵȵȼC40rC40ȡֵ
d 䓽ֱ a 䓽ϵ(sh)䓽aȡ0.16䓽aȡ0.14
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