LABORATORIUM UJI BAHAN

JURUSAN TEKNIK SIPIL

POLITEKNIK NEGERI BANDUNG

Jl. Gegerkalong Hilir Ds. Ciwaruga Kotak Pos 6468 BDCD Tlp. (022) 2013789, Fax. (022) 2016150 Ext. 266 Bandung

JOB 4 AMBANG PERSEGI DAN SEGITIGA

ALIRAN DIATAS BENDUNGI. CONTOH PERHITUNGANDari data 1

Diketahui :Lebar Saluran (b) = 10 cm Tangki pengukur debit (BxL) = 50cx70cmPercepatan gravitasi (g) = 9.81 m/detik2 L= 5 meterY1 = 158.1 mm

H = 50 cm.

T = 7,52 detik

Peyelesaian :

h = y P = 158.1 105 = 53.07 mm

Rasio Ketinggian = H / P = 62.872 / 105 = 0.60Cd1=

EMBED Equation.3 ==0.645Cd2=

EMBED Equation.3 ==0.500Cd dengan Rehbock Cd= 0.611 + 0.08 (H/P) = 0.611 + 0.08 (62.87/105) = 0.659Cd dengan Cd- Francis Cd = Qact/( Qtheo x Cc((1+)-()))Cd = = 0.215VII. DATA DAN TABEL PERHITUNGAN

VIII. GRAFIK

VIIII. KESIMPULAN DAN SARAN

Dari Hasil Percobaan didapat rata-rata:Y1= 14.31mmY2= 1.1833mmHw= 747.44mmT= 47.05 detikQ= 1.174 liter/detikA1= 0.0014 m2A2= 0.00012 m2V1= 8.786 m/detikV2= 9.0091 m/detikH1= 0.054 mmH2= 4.537 mmCw= 8.243

= 0.15

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