9214_k_value

21 sample observation and calculations determination

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Unformatted text preview: Dia of plate used PROVINCJ RING DIAL GAUGE READINGS : 1.8 g/cm3 : 75 cm LOAD IN kN (kgf) DEFLECTION (mm)Drar, GAUQE READINGS ~______h____--~ DG DG 1 DG 2 3 AVERAGE DE~LECWON, mm IO.04 3.1 kN (310 kgf) ( 0*007 MPa) 26.00 15.10 11.26 17.45 IO.72 34.1 kN (3410 kgf) ( 0.07 MPa ) 25.72 14.62 10.88 17.07 1106 49.6 kN ( 4 960 kgf) (.I12 MPa) 25.37 14.52 11.73 16.87 Il.40 65.1 kN (6510kgf) ( 0.150 MPa ) 25.00 14’00 IO.36 16.45 11.74 80.6 kN (8OGOkgf) (0.182 MPa) 24.70 13.90 10’16 16.25 12.08 94.1 kN (9410 kgf) (0.217 MPa ) 24,77 13.85 9.99 16.20 Ku kg/cm+n MPa/cm 19 18’5 is t 9314- 1979 0.07 ..= [Total deflectIon m cm at 341 kN ( 3 410 kgf) Total deflection at 3.1 kN (310 kgf) load ] Calcularions KU = 0.07 o.038= 1.85 MPa/cm or -% = 18.5 kgf /cme/cm. 0.038 CORRECTION FOR K-VALUE MPa/cm MODULUSOFSUBCX~ADE tcorrected for *Corrected for load deformation bending of plate of 75 cm + curve for 75 cm I$ Uncorrected value KU for 75 cm 4 Kd 1 (kgfcmz/cm) 1.85 ( 18.5) $Corrected for saturation 75 cm 4 plate ( to be done at the end ) Kb 1.555 ( 15.55) x I.21 ( 12.1 ) K-b 0.97 (9.7 ) *For applying correction to the KU value obtained in the field using 75 cm dia plate for load deflection, plot load-deflection curves as explained in 5.2.2 and demonstrated in Fig. 4. Assuming that the curve obtained is for shear failure having concave shape upwards, draw a dotted correction curve passing through origin, parallel to the shear failure curve. Enter at the loading intensity of 0.07 MPa ( 0.7 kg/cm2 ) and determine corrected deflection. From Fig. 4, we obtain 0.045. Correc:ed value for load deflection is Kd = G:!& = (3%) 1.555 MPa/cm ( 15.55 kgf /cm2/cm ). tcorrection for bending of plate of 75 cm dia shall be applied as shown in Fig. 5 (see 5.1.3). Enter at K= 1.555 MPa/cm ( 15.55 kg/ems/cm ), and read the corrected valuer? bendmg of plate, that IS Kb = 1.21 MPa/cm ( 12.1 kgf /cme/cm ). #Assuming or, = 0.8 which is obtained from consolidation Substituting value of-$ @97 MPa/cm in ( 9.7 kgf /cma/cm equation d KS:- ds ). 20 test result ( refer 5.1.4 ). x Ku = 0.8 x 1.21 ( 0.8 x 12.1) = IS :9214 - 1979 ( Continuedfrom page 2 ) Representing Members Snn~ R. C. DESAI DIRECTOR Asia Foundations and Construction Bombay Mah;ar;tra Engineering Research (P ) Ltd, Institute, RESEARCX OFFICER ( &era&e ) Geological Survey of India, Calcutta DIRECTOR GENERAL SARI S. K. Spoils ( Allernate ) SHXI P. N. MEHTA ( Allernale) Central Public Works Department, New I?elhi ENQINEER EXECUTIVE ( DESIGNS V ) EXECUTIVE ENGINEERS SM & RD ) Public Works Department, Government of 7’amil ( Nadu, Madras Centrai Road Research Institute ( CSIR ), Xew Snn~ T. K. NATARAJ~N Delhi River Research Institute, Government of West SH~I H. R. PRAMANIK Bengal, Calcutta SHRI H. L. SAHA ( Alternate) Engineer-in-Chief’s Branch, Army Headquarters MAJ K. M. S. SAHASI M~J V. B. AT~OR~ ( Alternate) Roads Wing, Ministry of Shipping and Transport SI~RI N. SIVAGURU SHRI P. K. THOMAS (Alternate) Public Works Department, Government of Uttar SHRI M. M. D. SETH Pradesh, Lucknow Associated Instruments Mfrs (I) Pvt Ltd, iYew SHRI H. C. VERNA Delhi SRRI T. S. NAQARAJ ( Alternate ) 21 BUREAU OF INDIAN STANDARDS H&dq-: Manak Bhavan, 9 Bahadur Shah Zafar Marg, NEW DELHI 110002 Telephones: 323 0131. 323 3375, 323 9402 Fax : 91 113234062, 91 113239399, 91 113239362 Telegrams : Manaksanstha (Common to ail Offices) cenfrai T&phon6 Labordory: Plot No. 20/9, Site IV, Sahibabad Indu...
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This note was uploaded on 03/14/2014 for the course CE 684 taught by Professor Prof.deepankarchoudhury during the Spring '13 term at IIT Bombay.

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