M
HNG1TÍNH TOÁN SÀN PHNGBTT................................................1
1.1. Vtl............................................................................................................1
1.2. Chnsbkchthc.....................................................................................1
1.3. cnhttrngsàn......................................................................................1
1.4. cnhstnh .........................................................................................2
1.5. cnhnlc..............................................................................................3
1.6. Tính toán ctthsàn......................................................................................4
1.7. Btrctthsàn............................................................................................5
HNG2TÍNH TOÁN KHUNG PHNG BTCT.........................................7
2.1. Vtl ...........................................................................................................7
2.2. Phân tích slàm viccakhng......................................................................7
2.3. Chnsbkchthc ....................................................................................8
2.4. Chnstnh ............................................................................................11
2.5. cnhttrngtcdnglên khung ..........................................................13
2.5.1.Ttrngng......................................................................................13
2.5.2.Ttrngngang ....................................................................................23
2.6. cnhnlc ...........................................................................................24
2.6.1.Nguyên lí chttlên khung .................................................................24
2.6.2.Thnlc ......................................................................................26
2.7. Tính toán ctthkhng ..............................................................................28
2.7.1.Tính toán ctthdm .........................................................................29
2.7.2.Tính toán ctthct ...........................................................................34
2.7.3.Kimtralkchthcdmct...........................................................38
2.8. Btrctthkhng ....................................................................................39
2.8.1.Btrctthdm ...............................................................................39
2.8.2.Btrctthct .................................................................................40
2.8.3.Ctoctthntkhng ...................................................................41
HNGVÍ DTNHTONKHNGHNGBÊTÔNG CTTH 47
3.1. Ndngn..............................................................................................47
3.2. Tính toán sàn tngnhình..........................................................................47
3.2.1.Vtl.................................................................................................47
3.2.2.Chnsbkchthc..........................................................................48
3.2.3.Xácnhttrngsàn...........................................................................48
3.2.4.cnhstnh...............................................................................49
3.2.5.cnhnlc ...................................................................................50
3.2.6.Tính toán ctthsàn...........................................................................51
3.2.7.Btrctthsàn.................................................................................52
3.3. Tính toán khung phngtrc ........................................................................58
3.3.1.Vtl.................................................................................................58
3.3.2.Phân tích slàm vickhng .................................................................58
3.3.3.Chnsbkchthc khung trc .....................................................58
3.3.4.cnhstnh...............................................................................62
3.3.5.cnhttrngtcdnglên khung trc.........................................62
3.3.6.cnhnlc khung trc...............................................................71
3.3.7.Tính toán ctthkhung trc ............................................................76
3.3.8.Btrctthkhung trc ..................................................................77
PH...........................................................................................................107
TÀI LITHAM KHO.................................................................................111
1
hng1
TÍNH TOÁN SÀN BÊ TÔNG CTTH
1.1. Vtlu
bê tông: sdngbê tông nngccpbnkhngnhhnB15.
ctthpthng(khngcng:tronglbuccaktcubn dùng ct
thép AI.
1.2. Chnsbkchthc.
Chiudày sàn phthucào nhpà ttrngtácdngcthsbxácnh
chiudàysànthocáccáchsauy:
Sàn1phng 1b L
25
1
h
Sàn2phng:
:L
42
1
38
1
:L
50
1
45
1
cm148
h
1
1b
Dmph:
Chiucaottdndmph:
mm200h
4
1
2
1
b
L
20
1
12
1
h
dpdp
dp
.
Dmchnh:
Chiu cao titdndmchnh:
mm200h
4
1
2
1
b
L
12
1
8
1
h
dcdc
dc
Brngttdndm: 200h5,03,0b
1.3. Ttrngtrên sàn
- Tnhttnhtoán:trnglngcáclpcutosànnhsau:
Hình 1.1: Cutosàn
2
+Gch: )m/kN(n..g 2
1gg1
+Lpalót: )m/kN(n..g 2
2vlvl2
+Bnsàn BTCT: )m/kN(n..hg 2
3BTCTb3
+Lpatrát: )m/kN(n..g 2
4vtvt4
- Trnglngbnthnsàn: )m/kN(gg 2
is
rong:
;- chiudày, trnglngrêng catlulpth.
i
n- hsttcalpsàn th.
i
g-trnglngbnthncalpcutosàn th )m/kN( 2
- Hotttnhtoán: )m/kN(n.pp 2
p
tc
s
tc
p- hotttêu chuntácdnglên sàn. Máncasinh viên sc
mtgátrrêng.
p
n- hstt.
- Tngt: )m/kN(pgq 2
sss
1.4. Stnh bnsàn.
ánhsthtbn
Các ô bncánhcùng 1 skh:
-Kchthcgngnhau.
- Ttrnggngnhau.
- Liên ktchugng nhau
ácnhlobn
Theo kinh nghimcthxm
- Khi chiucaodmhd > 3hb bncngàm lên dm.
- Khi chiucaodmhd < 3hb bnctalên dm.
Xét tscnhdài và cnhngn
- Khi 2
1
2 : thucbnkê 4 cnhbnlàm victhohaphng.
- Khi 2
1
2 l
l: thucbnlodmbnlàm vicmtphngthophng
cnhngn.
3
Bng11:Stnhsàn
Ô s L1 L2 Tsll1 Lobn
11,5 1,6 1,07 Bnkê los9
21 3,2 3,2 Bnlodm2ungàm
1.5. ácnhnlc.(thosàn hbnn
a. Sàn2hng
Nlctrongbnndùng bngtralpsnchocácbn
Hình 1.2: stnhcácsàn2phng
Công thcxácnhmmntrongtrnghptngquátchosàn2phng.
-Mmndnglnnhtgabn:
+Thophngngn:M1 = mi1.P (kNm/m).
+hophngdà:M2 = mi2.P (kNm /m).
- Mômen âm lnnhttrên g:
+hophngngn:MI = ki1.P (kNm /m).
+hophngdà:MII = ki2.P (kNm /m).
rong:
21ss l.lpgP
là tngttrngtrên 1 ô bn.
(gs , ps là tnhthottphnbutrên ô bnckchthc
l1xl2)
i=1,2,…,11 là chslobn.
Ch s 12 – ch phng ang xt là phng cnh ngn l1 hay
phngcnhdài l2.
Các hsmi1, mi2, ki1, ki2ctrabngphthuctsl2/l1và
lobn.
b. Sàn1hng