ʱ : һ -碧桂园斜屋面高支模施工方?- 百度文库ϿʼĶ
йʽ㣬ȡеĽСֵ: F1=0.22t12V1/2 F2=H
-- ŵܶȣȡ24.000kN/m3 t -- ½ijʱ䣬ȡ3.000h T -- ŵģ¶ȣȡ20.000棻 V -- ŵĽٶȣȡ1.500m/h
H -- Ųѹλô½Ŷܸ߶ȣȡ0.500m 1-- ӼӰϵȡ1.000 2-- ̮Ӱϵȡ1.000 ʽõ F1=19.400 kN/m2 F2=12.000 kN/m2
½ģѹG4k=minF1F2=12.000 kN/m2 ŲѹЧѹͷ߶ȣh=F/=12.000/24.000=0.500m () ʱĺرֵQ2k
Q2k=4kN/m2 () ȷõĺ
ӶȲñϣ q=12.0001=12.000kN/m غͼûϣ ײأ
q=maxq1q2=18.108kN/m
ɿɱЧӦƵϣ
q1=0.9(1.212.000+1.44)1=18.000kN/m
úЧӦƵϣ
q2=0.9(1.3512.000+1.40.74)1=18.108kN/m
أ
q=0.91.40.741=3.528kN/m
2.
ܾãʵе㣬õͼͼ£
18.108kN/m3.528kN/m10015070
غͼͼ
0.0830.011
ͼ(kNm)
1.3240.3590.1971.583
ͼ(kN)
12kN/m10015070
μͼ
0.0170.127
ͼ(mm) õ:
M= 0.083kNm V= 1.583kN Σ= 0.127mm ֧F= 2.906kN
3.
(һ) 忹ǿȼ
=M/W=0.083106/5.400104 =1.536N/mm2
ʵӦֵ =1.536N/mm Сڿǿֵ [f]=15N/mmҪ
() Ӷȼ
Ӷ: ṹ[]=l/250
1ӶΪ0.127mmӶΪ0.400mmҪ 2ӶΪ0.017mmӶΪ0.600mmҪ 3ӶΪ0.020mmӶΪ0.280mmҪ ʵӶȼֵСӶֵҪ
2
2
ģ֧ŵļ
1.
2483.5ֹΪһ飬2顣
ĽԾIֿW͵ģEֱΪ I=212.19104= 2.438105 mm4 W=25.08103= 1.016104 mm3 E=206000 N/mm2
ֱӳģ崫ݵĺأվµ㡣 ذ֧ȵõ (a) غͼãq = 2.906/1=2.906 kN/m (b) ӶȲãq = 1.835/1=1.835 kN/m M = 0.1ql2=0.12.9060.4502=0.059kN.m V=0.6ql=0.62.9060.450=0.785kN
֧ N=1.1ql =1.12.9060.450=1.439kN
= 0.677ql4/100EI=0.6771.835450.0004/(1002060002.438105)=0.010mm
(1) 㿹ǿȼ
=M/W=0.059106/1.016104 =5.793N/mm2
ʵӦֵ =5.793N/mm2 Сڿǿֵ [f]=205N/mm2Ҫ
(2) 㿹ǿȼ
=VS0/Itw=0.39210006946/(2.4381053.5)=3.194N/mm2
ʵʼӦֵ 3.194 N/mm2 Сڿǿֵ [fv]=120.000 N/mm2Ҫ
(3) Ӷȼ Ӷȣ =0.010mm
Ӷ: ṹ[]=l/250=1.800mm
ʵӶȼֵ: =0.010mmСӶֵ:[] =1.800mmҪ
2.˨
㹫ʽ: N<[N]= fA
N -- ˨ܵ A -- ˨Ч (mm2)
f -- ˨Ŀǿֵȡ170 N/mm2 ˨ͺ: M12 ã ˨Чֱ: 9.85 mm ˨Ч: A = 76 mm2
˨ֵ: [N] = 17076/1000 = 12.920 kN ˨ܵ: N =1.439 kN
˨ܵ N=1.439kN С ˨ֵ