Báo cáo Chuyên dề nền móng.docx

Chuyn nn mng GVHD: TS Trng Quang ThnhDANH SCH NHM 16STTH v tnMSSV

1Phm c Trng10510301518

2Nguyn Cao Thu10510300960

3Nguyn T Duy Thin10510301480

4Nguyn Cao Sang10510300752

5Nguyn Minh Quang10510300714

6Nguyn nh Ngha10510300577

7Nguyn Ngc Tuyn10510301119

8on Minh Tng10510301533

9Phm Thanh Ton10510301505

10V nh Hong Lm10510300455

MC LCCHNG 1: TNH TON NI LC CHO KHUNG NH IN HNH CUNG CPD LIU U VO THIT K MNG NNG41.1.Kch thc khung ngang nh..41.2.S b tit din cc cu kin trong khung51.3.Xc nh ti trng...61.4.T hp ni lc8CHNG 2: THIT K MNG N GCH, , B TNG142.1.Khi qut phng php tnh ton.142.2.V d tnh ton..15CHNG 3: THIT K MNG N B TNG CT THP.183.1.nh ngha v phn loi183.2.Tnh ton mng n chu ti thng ng ng tm, lch tm...183.3.V d minh ho cho vic tnh ton cho mng n b tng ct thp chu ti lchtm263.3.1.S liu bi...263.3.2.Chn din tch y mng.263.3.3.Kim tra tit din y mng273.3.4.Tm chiu cao i theo iu kin chng chc thng...283.3.5.Tnh ton ct thp mng.293.3.6.Kim tra li tit din mng chn bng cp ni lc Mmax, Ntu, Qtu.303.3.7.Kim tra iu kin bin dng ca nn t...31CHNG 4: THIT K MNG PHI HP 2 CT..344.1.S b kch thc mng.344.2.Xc nh p lc tnh ton y mng.344.3.Kim tra chiu cao mng theo iu kin chc thng354.4.D tnh ln cho nn di mng374.5.Tnh ton thp mng.384.5.1.Xc nh ni lc dm mng.384.5.2.Xc nh ct thp dm mng..404.5.3.Xc nh ni lc bn mng.404.5.4.Xc nh ct thp bn mng414.6.Xc nh ni lc dm mng theo m hnh nn n hi bng SAP 2000 v15...414.6.1.C s l lun414.6.2.Cc bc tnh ton..414.6.4.So snh vi quan nim mng cng v nhn xt.51CHNG 5: THIT K MNG CC (CC NHI)535.1.Xc nh ti trng.535.2.Thng k s liu a cht..535.3.La chn gii php cc.535.3.1.Vt liu.535.3.2.S b cc kch thc ..535.4.nh gi sc chu ti ca cc545.4.1.Sc chu ti ca cc theo vt liu545.4.2.Sc chu ti ca cc theo t nn.545.5.Xc nh s lng cc v b tr cc vo i.555.5.1.Xc nh s lng cc..555.5.2.B tr cc vo i.555.6.Kim tra lc tc dng vo u cc565.7.Kim tra p lc v d tnh ln ca nn di mng cc...575.7.1.Khi mng quy c.575.7.2.Kim tra p lc ti y khi mng quy c585.7.3.D tnh ln cho nn di mng..585.8.Tnh kt cu i cc..595.8.1.Kim tra iu kin chc thng cho i595.8.2.Tnh ton ct thp chu un cho i cc..605.9.Kim tra kh nng chu ti trng ngang ca h cc.615.9.1.Xc nh momen ngm tnh ton ti lin kt cc v i.615.9.2.Xc inh ni lc trong cc..625.9.3.Kim tra kh nng chu ti trng ngang ca mi cc n...675.9.4.Kim tra n nh nn quanh cc..685.10.ng dng phn mm SAP 2000 v15 xc nh ni lc cc.685.10.1.C s l lun.685.10.2.Cc bc tnh ton695.10.3.So snh vi phng php tra bng v nhn xt.78

CHNG 1: TNH TON NI LC CHO KHUNG NH IN HNH CUNG CP D LIU U VO THIT K MNG NNG1.1.Kch thc khung ngang nh:-Chn cao trnh mt ngm ti ct -0.7m.

Hnh 1.1 S khung ngang nh 4 tng, 4 nhp1.2.S b tit din cc cu kin trong khung:

-Tit din sn theo sn c kch thc 6x6m: mm.

-S b tit din dm khung ngang: ;

+Dm A-B v C-D: Chn tit din 200x200;

+Dm B-C v D-E: Chn tit din 200x400.-S b tit din dm dc Chn tit din 200x200.

-S b tit din ct: Act = +Hot ti sn xc nh theo TCVN 2737-1995:Bng 1.1 Ti trng tiu chun cc tngTngTi trng tiu chun (daN/m2)

Ton phnPhn di hn

1,2,320070

Mi30-

+Ct trc B,C,D tng 1,2,3 (tnh theo ct trc D tng 1):

Hnh 1.2 Din tch truyn ti sn ct trc D

Act =cm2Chn tit din 300x200;+Ct trc B, C, D tng 4 v ct bin trc A, E -> Chn tit din 200x200.1.3.Xc nh ti trng:1.3.1.Tnh ti v hot ti s dng:-S truyn ti sn vo khung:

Hnh 1.3 S truyn ti vo khung ngang-Tnh ton gi tr ti trng tp trung v phn b ln khung ngang, gi tr tiu chun ca ti trng c th hin cc bng sau.

Bng 1.2 Tnh ti sn v thnh phn hot ti di hn(Khng k trng lng bn thn khung ngang)Tnh tiNhp A-BNhp B-CNhp C-DNhp D-E

Ti tp trung (daN)Ti phn b (daN/m)Ti tp trung (daN)Ti phn b (daN/m)Ti tp trung (daN)Ti phn b (daN/m)Ti tp trung (daN)Ti phn b (daN/m)

Tng 1TriPhi23702370-38003800217323702370-355535552370

Tng 2TriPhi23702370-380038002173

23702370-355535552370

Tng 3TriPhi23702370-38003800217323702370-355535552370

Tng 4TriPhi19501950-31303130178819501950-292529251950

Bng 1.3 Tnh ti tng v dm dc (Tng bao ngoi 200, tng ngn 100)Tnh tiNhp A-BNhp B-CNhp C-DNhp D-E


Tng 1TriPhi69063560558

-558

35603560558

-6906558

Tng 2TriPhi69063560558-55835603560558-6906558

Tng 3TriPhi69063560558-55835603560558-6906558

Tng 4TriPhi210210---210210--210-

Bng 1.4 Thnh phn hot ti ngn hnHot tiNhp A-BNhp B-CNhp C-DNhp D-E


Tng 1TriPhi780780-12501250715780780-11701170780

Tng 2TriPhi780780-12501250715

780780-11701170780

Tng 3TriPhi780780-12501250715780780-11701170780

Tng 4TriPhi180180-290290165180180-270270180

1.3.2.Hot ti gi:-Vng gi IIB.-Gi tr tnh ton ti gi n (ti phn b dc chiu di ct):Bng 1.5 Gi tr hot ti gi cc tng mt n giTngW0(daN/m2)hkcB(m)Wh(daN/m2)

1953.30.810.86370

2956.60.920.86420

3959.910.86456

49513.21.050.86479

-Gi tr tnh ton ti gi ht (ti phn b dc chiu di ct v dm mi):Bng 1.6 Gi tr hot ti gi cc tng mt khut giTngW0(daN/m2)hkcB(m)Wh(daN/m2)

1953.30.810.66277

2956.60.920.66315

3959.910.66342

49513.21.050.66360

1.4.T hp ni lc:-Cht hot ti sn trn tng nhp ca tng v 2 hot ti gi tri, gi phi.-Da trn kt qu phn tch ni lc t hp sau lc cc trng hp ti trng gy nguy him cho i tng ang xt tc l phn lc chn ct.1.4.1.Gii php mng gch :-S tnh vi lin kt gia ct v mng l lin kt khp mng khng chu un:

Hnh 1.4 S tnh khung ngang khi cu to mng gch

-Kt qu phn lc mng c th hin trong bng sau:Bng 1.7 Gi tr tiu chun cc thnh phn phn lc ctTABLE: Joint Reactions

JointOutputCaseCaseTypeF1F3

TextTextTextdaNdaN

ANmaxACombination887.3638657.91

BNmaxBCombination2610.8867100.67

CNmaxCCombination-2741.5864551.51

DNmaxDCombination-1794.4672627.56

ENmaxECombination-1318.5965390.40

Bng 1.8 Gi tr tnh ton cc thnh phn phn lc ctTABLE: Joint Reactions

JointOutputCaseCaseTypeF1F3

TextTextTextdaNdaN

ANmaxACombination1066.6643236.68

BNmaxBCombination3112.1874726.66

CNmaxCCombination-3256.2371892.50

DNmaxDCombination-2190.2981020.13

ENmaxECombination-1559.9972926.97

-Chn thit k mng gch di ct E, trng hp ti trng gy nguy him cho mng th hin trong bng sau.Bng 1.9 Trng hp cht ti cho ni lc NmaxENhp A-BNhp B-CNhp C-DNhp D-EGi triGi phi

Tng miXX

X

Tng 4XX

Tng 3XX

Tng 2XX

(X l v tr c hot ti)

1.4.2.Gii php mng b tng ct thp:-S tnh ct ngm vo mng:

Hnh 1.5 S tnh khung ngang khi cu to mng b tng ct thp-Kt qu phn lc mng c th hin trong bng sau:Bng 1.10 Gi tr tiu chun cc thnh phn phn lc ctTABLE: Joint Reactions

JointOutputCaseCaseTypeF1F3M2

TextTextTextdaNdaNdaN-m

ANmaxACombination960.1137389.351692.64

AMmaxACombination-1143.2330252.75-1955.26

ANmaxBCombination954.7437345.741685.38

AMmaxBCombination952.0935882.191681.17

ANmaxCCombination-1130.0130287.73-1931.61

AMmaxCCombination-1139.3028018.30-1950.16

ANmaxDCombination-1130.6828041.04-1939.26

AMmaxDCombination942.2937256.221662.21

ANmaxECombination-1135.8627990.35-1946.26

AMmaxECombination-1142.7428008.88-1955.14

BNmaxACombination2649.9564395.775424.52

BMmaxACombination-1801.6161974.55-4539.48

BNmaxBCombination2762.0066943.685572.30

BMmaxBCombination2779.9563538.895593.71

BNmaxCCombination-1789.1466402.01-4502.43

BMmaxCCombination-1792.7262115.26-4528.15

BNmaxDCombination-1918.8161615.92-4696.74

BMmaxDCombination2748.3662443.085531.90

BNmaxECombination-1908.6357647.10-4683.66

BMmaxECombination-1800.3559695.54-4539.65

CNmaxACombination1678.5759597.594136.78

CMmaxACombination-3034.2360046.15-6170.26

CNmaxBCombination1570.3464334.273993.10

CMmaxBCombination1564.0162379.433983.09

CNmaxCCombination-2985.1564563.67-6085.21

CMmaxCCombination-3031.3460215.52-6166.68

CNmaxDCombination-2906.1161932.08-6003.35

CMmaxDCombination1526.8257654.883913.72

CNmaxECombination-2915.9658003.17-6016.26

CMmaxECombination-3033.9260007.88-6171.70

DNmaxACombination2836.8760188.375671.09

DMmaxACombination-1327.5569680.24-3912.72

DNmaxBCombination2840.2562413.695674.99

DMmaxBCombination2822.2564581.065649.73

DNmaxCCombination-1504.4469177.03-4126.35

DMmaxCCombination-1355.3967525.04-3949.54

DNmaxDCombination-1361.2572033.44-3959.63

DMmaxDCombination3002.6764539.865867.98

DNmaxECombination-1355.9971929.13-3952.55

DMmaxECombination-1328.9569694.79-3916.44

ENmaxACombination840.9352911.431483.07

EMmaxACombination-1659.8162441.18-2693.94

ENmaxBCombination839.1152931.121480.48

EMmaxBCombination848.1354971.311491.89

ENmaxCCombination-1557.6961962.06-2552.36

EMmaxCCombination-1647.6762398.75-2677.98

ENmaxDCombination-1649.5764468.03-2681.18

EMmaxDCombination746.2856992.831350.68

ENmaxECombination-1649.9864481.49-2681.69

EMmaxECombination-1660.4662451.78-2695.35

Bng 1.11 Gi tr tnh ton cc thnh phn phn lc ctTABLE: Joint Reactions

JointOutputCaseCaseTypeF1F3M2

TextTextTextdaNdaNdaN-m

ANmaxACombination1155.1941709.102038.43

AMmaxACombination-1368.8333145.19-2339.05

ANmaxBCombination1148.7341656.782029.72

AMmaxBCombination1145.5639900.512024.67

ANmaxCCombination-1352.9733187.16-2310.67

AMmaxCCombination-1364.1130463.84-2332.93

ANmaxDCombination-1353.7730491.13-2319.85

AMmaxDCombination1133.7941549.362001.92

ANmaxECombination-1359.9930430.31-2328.25

AMmaxECombination-1368.2430452.55-2338.91

BNmaxACombination3141.3371483.736469.21

BMmaxACombination-2200.5468578.27-5487.59

BNmaxBCombination3275.7874541.226646.55

BMmaxBCombination3297.3270455.486672.24

BNmaxCCombination-2185.5773891.22-5443.14

BMmaxCCombination-2189.8868747.12-5474.00

BNmaxDCombination-2341.1968147.91-5676.31

BMmaxDCombination3259.4269140.516598.06

BNmaxECombination-2328.9763385.33-5660.61

BMmaxECombination-2199.0365843.46-5487.79

CNmaxACombination2075.5465945.545056.22

CMmaxACombination-3579.8166483.81-7312.23

CNmaxBCombination1945.6771629.564883.81

CMmaxBCombination1938.0869283.754871.80

CNmaxCCombination-3520.9271904.84-7210.17

CMmaxCCombination-3576.3566687.06-7307.93

CNmaxDCombination-3426.0768746.92-7111.93

CMmaxDCombination1893.4563614.294788.55

CNmaxECombination-3437.8964032.23-7127.43

CMmaxECombination-3579.4566437.89-7313.96

DNmaxACombination3336.6466096.556726.87

DMmaxACombination-1660.6677486.79-4773.70

DNmaxBCombination3340.7068766.936731.55

DMmaxBCombination3319.1071367.786701.24

DNmaxCCombination-1872.9376882.94-5030.05

DMmaxCCombination-1694.0774900.55-4817.88

DNmaxDCombination-1701.1080310.63-4829.99

DMmaxDCombination3535.6171318.336963.14

DNmaxECombination-1694.7980185.46-4821.49

DMmaxECombination-1662.3477504.25-4778.16

ENmaxACombination1051.0157953.361838.68

EMmaxACombination-1949.8869389.06-3173.72

ENmaxBCombination1048.8357976.981835.58

EMmaxBCombination1059.6660425.221849.27

ENmaxCCombination-1827.3368814.12-3003.83

EMmaxCCombination-1935.3169338.15-3154.57

ENmaxDCombination-1937.5971821.28-3158.42

EMmaxDCombination937.4462851.041679.82

ENmaxECombination-1938.0871837.44-3159.03

EMmaxECombination-1950.6669401.78-3175.42

-Chn thit k mng n di ct E, mng phi hp 2 ct C v D, cc trng hp ti trng gy nguy him cho mng th hin trong bng sau.Bng 1.12 Trng hp cht ti cho ni lc NmaxENhp A-BNhp B-CNhp C-DNhp D-EGi triGi phi

Tng miXX

X

Tng 4XX

Tng 3XX

Tng 2XX

Bng 1.13 Trng hp cht ti cho ni lc MmaxENhp A-BNhp B-CNhp C-DNhp D-EGi triGi phi

Tng miXX

X

Tng 4XX

Tng 3XX

Tng 2XXX

Bng 1.14 Trng hp cht ti cho ni lc NmaxCNhp A-BNhp B-CNhp C-DNhp D-EGi triGi phi

Tng miXXX

X

Tng 4XXXX

Tng 3XXXX

Tng 2XXXX

Bng 1.15 Trng hp cht ti cho ni lc MmaxCNhp A-BNhp B-CNhp C-DNhp D-EGi triGi phi

Tng miXX

X

Tng 4X

Tng 3X

Tng 2XX

Bng 1.16 Trng hp cht ti cho ni lc NmaxDNhp A-BNhp B-CNhp C-DNhp D-EGi triGi phi

Tng miXX

X

Tng 4XXX

Tng 3XXX

Tng 2XX

Bng 1.17 Trng hp cht ti cho ni lc MmaxDNhp A-BNhp B-CNhp C-DNhp D-EGi triGi phi

Tng miX

X

Tng 4XX

Tng 3X

Tng 2XXX

(X l v tr c hot ti)

CHNG 2: THIT K MNG N2.1.Khi qut phng php tnh ton:Gch, , b tng, b tng hc l nhng loi vt liu chu ko km, do phi cu to m bo mng khng b un di tc dng ca phn lc nn (mng cng).Vi kch thc y mng bit v chiu cao mng c xc nh nh sau:Bc 1:Tnh cng tnh ton trung bnh ti y mng:

Trong :

- ti trng nn tnh ton tc dng ti nh mng.

- trng lng ring trung bnh ca mng v t trn mng, thng chn t 2022kN/m3h chiu su chn mng trung bnhn- h s tin cy ca trng lng vt liu mng v t trn mng, n=1,1Am- din tch y mng

Bc 2: Xc nh gc m gii hn :

cnh mng khng b un do phn lc nn cn khng ch gc m hay cotg=H/L ca ton mng hay ca tng bc mng cotg khng c qu ln.

Tr s gii hn ca cotg ph thuc loi mng, mc b tng, cng tnh ton trung bnh di y mng (tra bng 2.11 v bng 2.12)

Hnh 2.1 Xc nh chiu cao mng cng

Bc 3: Xc nh chiu cao mng:

Hm=max(L[cotg],B[cotg])Trong :

bc ,lc ln lt l b rng v chiu cao tit din chn ctBc 4: Cu to mng:Do iu kin thi cng v kch thc vin xy (gch, hc...) mng cng thng cu to dng bc. Chiu cao ca bc mng hc ly bng hai dy xy, ph thuc vo kch thc , hb=33 60 cm. i vi mng b tng hc th hb 30 cm.

Bng 2.1 Tr s cotgi vi mng b tngMng b tngMc b tngp lc trung bnh di y mng do ti trng tnh ton gy ra

150 kPa 150 kPa

Mng n< 1001.652.00

1001.501.65

Mng bng< 1001.501.75

1001.351.50

Bng 2.2: Tr s cotgi vi mng hc v b tng hcMng hc v b tng hc khi mc vap lc trung bnh di y mng do ti trng tnh ton gy ra

200 kPa> 200 kPa

50 1001.251.50

15 351.501.75

4 101.752.00

2.2.V d tnh ton:Thit k mng n gch, cho mng di ct trc E, t nn theo h s a cht HK1.Ti ng tm khung trc E: Ntc= 654 kN

Trng lng n v th tch: =17.3kN/m3Bng 2.3 Quan h e-pLp tCp p lc (kN/m2)

02.5510203040

Lp 11.4721.4321.4251.4191.4121.3941.388

Lp 30.5840.5660.5480.530.5140.4980.486

Thit k:Bc 1: Kim tra nn c lm vic nh vt liu bin dng n hi vi iu kin Rtc ptc:Chn su t mng l 1.5 m, mng vung cnh 2 mp lc y mng:

Sc chu ti tiu chun:

Trong :m1=1.3; m2=1.1(gi s nh tng i mnh L/H>4)ktc=1 s dng kt qu t phng th nghim

Vy Rtc> ptc nn cn trong giai on n hi.Bc 2: Kim tra bin dng ca nn thng qua ln ti tm mng.p lc gy ln ti tm y mng:

Chia nn thnh cc lp phn t dy 0.5 m, lp bng d tnh ln cc lp nh sau:Bng 2.4 D tnh ln cho nn di mngLpimz(cm)z/bk0z(kPa)bt(kPa)p1i(kPa)p2i(kPa)e1ie2iSi(cm)

100011682731.5190.91.4301.4120.364

10.50.250.898150.836

240.5174.31.4271.4130.286

210.50.696116.945

349.5153.40.5500.5210.929

31.50.750.54190.854

458.5136.30.5440.5240.671

4210.38664.863

567.5124.20.5410.5260.505

52.51.250.2948.772

676.5117.10.5380.5270.364

631.50.19432.581

785.5114.70.5350.5270.246

73.51.750.15425.890

894.5117.00.5310.5280.125

8420.11419.199

S=3.493

Vy S=3.4936 < 8 cm tha yu cu gii hn ln.Bc 3: Xc nh chin cao mng:

m bo yu cu ca mng ta chn mc va 35MPa v p lc trung bnh di y mng 2.5 (L: chiu di tng; H: chiu cao tng) L/H

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Báo cáo Chuyên dề nền móng.docx