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- V125 cos- – j sin 11 11 Simplify cos + j sin 11 Cos 114.5.12 OIC Section Properties Write functions for A, I, c, radius of gyration. Each function works for the three sections below. Example Function name: OICSEC_A() • OICSec_() Etc. 을 + 12 BIP - bhs V, 12(BII-bh) BII -- bha 6/1 - 8There is a statically indeterminate beam in which the horizontal force at the left and right ends (points A and D) is zero, and the vertical force is shown in the figure below, The flexural stiffness of the beam section is constant El: Try to find the slope (Slope) of point B after deformation.
- Streeter-Phelps Model: kaba (e-Rt – e-kt) + Da(e-k) k. - ka 1 In k, – ka k„ – k. D = to ka La 1.135 T4 – 20 3.9 u0.5 BOD, = L, (1– e-kat) k = k20 6T-20 kr,20 1.056 T 20 – 30 %3D | h1.5 1.024 Wastewater is being discharged into Diliman River, both waters having a temperature of 20 °C. After mixing, it was found that the initial ultimate BOD of the mixed water is 15 mg/L. The DO in the Diliman River right after the mixing point is at saturation. At 20 °C, the deoxygenation rate constant (ka) is 0.3/day while the reaeration rate constant (k,) is 0.5/day. Express your computed values in at least four (4) significant figures. 1A. Determine the critical time t. (days) for the DO of the river. 18. Calculate the minimum D0 concentration DOmin (mg/L) of the river. 1C. Draw and label properly the DO Sag Curve of the river. Is the assimilative capacity of the river restricted? Explain your answer. Saturation Values of DO in Freshwater exposed to specific saturated vapor pressure Temperature (°C}…5.13 The shallow foundation shown in Figure 5.29 measures 1.5 mx 2.25 m and is subjected to a centric load and a moment. If e, = 0.12 m, e, = 0.36, and the depth of the foundation is 0.8 m, determine the allowable load the foun- dation can carry. Use a factor of safety of 4. For the soil, we are told that the unit weight y = 17 kN/m³, friction angle o'= 35°, and cohesion c' = 0.p2 – 3r + 2 lim r-1 | r - 1
- 8+81 al 25 Ey Eg 1. What is the value of ybar from the 1-1 line [Select } 2. What is the value of centroldal MOI Ixx? Select J 3. What is the value of centroidal MOI lyy? [Select]DETERMINE THE CENTROIDAL MOMENT OF INERTIA OF THE BUILT-UP SECTION SHOWN USING A STEEL PLATE 1"X16" AND C-12X25 STEEL SECTION WELDED TOGETHER. REFER TO THE TABLLE BELOW FOR THE PROPERTIES 12 Type EDSM Nomenciature AISC Manual Label C15X50 14.7 3.72 3.52 3.40 15.0 8716 0.799 404 11.0 17 C1SK40 C15X40 118 10.0 150 0520 0.400 0510 0650 0.650 0.501 0.501 0.501 0.778 348 315 C15K339 15.0 120 0.788 .07 C1200 C12X25 C12207 C1200 8.01 7.34 3.17 0.674 162 5.12 C1228 C12207 12.0 3.05 234 0.674 144 445 12.0 0.282 129 3.05 1. Determine Ixx (Centroidal) Not in the choices [Select] 1987.6 2. Determine lyy (Centroidal) 1642.67 Not in the choices 1612.7 1752.5Convert the properties of your assigned AASHTO I-beams to Sl units. B1 BI Assigned AASHTO I-beam Туре 1 Туре 2 Group No. D2 1 D3 D2 2 D4 B3 B4 B5 Туре 3 Туре 4 Туре 5 Туре 6 B3 B4 4 DI B6 B6 D5 D6 DS Туре 1 Туре 2 8 B2 D6 Туре 1-IV Dimensions (inches) Type V-VI Туре D1 D2 D3 D4 D5 D6 B1 B2 B3 B4 B5 B6 28 4 3 5 5 12 16 6 3 5 II 36 3 6 6 12 18 6 3 6 III 45 4.5 7.5 7 16 22 7 4.5 7.5 IV 54 8. 6 8. 20 26 8 6. 9 V 63 4 10 8. 42 28 8 4 13 10 VI 72 5 3 4 10 8 42 28 8 4 13 10 Properties: Area in.? Inertia Ybottom in. Weight kip/ft Туре in. 276 12.59 22,750 0.287 II 369 15.83 50,980 0.384 III 560 20.27 125,390 0.583 IV 789 24.73 260,730 0.822 V 1,013 31.96 521,180 1.055 VI 1,085 36.38 733,320 1.13 67