MindTap Engineering, 1 term (6 months) Printed Access Card for Dunlap's Sustainable Energy, SI Edition, 2nd
2nd Edition
ISBN: 9781337551779
Author: DUNLAP, Richard A.
Publisher: Cengage Learning
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As a structural engineer, your task is to design an optimum section that has sufficient resistance to the applied
loading for the primary beam proposed in Figure 1. A UB in grade S275 steel is required for the unrestraint
beam to carry the ultimate loads over the given span. Choose an optimumUB section and justify your selection.
You are required to submit a design analysis by considering bending, shear, transverse force, and deflection
checking for the selected member based on Eurocode 3 and the assumption of support condition and loading
must be clearly stated.
P=15 kN. a 2 m. b=3m
·L·
·b.
Figure 1 Simply supported steel beam
Why is it important to establish logical relationships between tasks when developing a construction schedule?
For the gravity concrete dam shown in the figure, the following data are available:
- Unit weight of concrete (Yeone) = 2.4 ton/m³
Neglect( Wave pressure, silt pressure, ice force and earth quake force)
-0.65, (Ywater) 1 ton/m³
Find factor of safety against sliding and overturning (F.Said & F.Sover), If heel and toe stresses (Pais &
Pmas) are 57.17ton/m2 and 84.53 ton/m² respectively.
w.s.l
83m
10m
80m
8m
Solve on paper step by
step with sketch
Chapter 7 Solutions
MindTap Engineering, 1 term (6 months) Printed Access Card for Dunlap's Sustainable Energy, SI Edition, 2nd
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- Why is proper planning important when developing a baseline construction project schedule?arrow_forwardDetermine the minimum possible surface area of a secondary clarifier treating activated sludge with a design influent flow rate (Q) of 1,000 m³/d, a return activated sludge (RAS) recycling ratio of 25%, and a mixed liquor total suspended solids (MLSS) concentration of 4,000 mg/L, if the overflow rate must be less than 33 m/d and the solids loading rate must be less than 250 kg/m²/d. Express your answer in m² and round up to the next integer.arrow_forwardEstimate the required air flow rate for the new activated sludge plant at Pea Ridge (Problems 23-223-723-10, and 23-13). The flow rate is 8,450 m³/day, the concentration of bCOD going into the system (So) is 137 mg/L, the concentration of bCOD leaving the system (S) is 16.3 mg/L, and the mass of cells produced per day (Pxvss) is 277.4 kg/d. Use the following assumptions to estimate the required air flow rate: . Clean water correction, a = 0.50 . Salinity correction, B = 0.95 Fouling factor = 0.9 Wastewater temperature = 12°C Atmospheric pressure = 101.325 kPa .Elevation 500 m . Depth of aerator = 5.6 m Operating DO 2.0 mg/L Percent oxygen leaving aeration tank - 19% ■ Manufacturer's SOTR = 535 kg/d Manufacturer's air flow rate at standard conditions 50 m³/d - aerator Express your answer with the units of m³/d and round to the nearest integer.arrow_forward
- Determine the required solids retention time (SRT) of a completely mixed activated sludge aeration tank for a conventional activated sludge system treating a design flow rate of 34,560 m³/d, where the effluent standards are 30.0 mg/L for BODs and 30.0 mg/L for total suspended solids (TSS). Assume that the BOD5 of the effluent TSS is 70% of the TSS concentration. Assume the BODs concentration leaving the primary clarifier is 128 mg/L that the MLVSS concentration (X₂) is 2,500 mg/L. Assume the following values for the growth constants: Ks 100 mg/L BODS ⚫ Hm - 2.5 d 1 kd = 0.050 d 1 Y = 0.50 mg VSS/mg BODs removed Express your answer in days and round to the nearest 0.1.arrow_forwardQ1: Figure below shows loaded beam with its cross-section area, (A) Draw shear force and bending moment diagrams, stating the main values, (B) Find central slope and deflection, (C) Sketch the distribution of shear stress at left support, (D) Find maximum tensile and compressive bending stresses set up in beam at right support. E-205GN/m² P1 P2 P3 W1 W2 Lin Lin # A Length in (m) and loads in kN 3a a 2a 2a (Cross-section area, All dimensions in (mm))arrow_forwardEstimate the mass of oxygen to be supplied for a new activated sludge plant at Pea Ridge to treat a flow rate of 8,450 m³/day. Assume that the concentration of bCOD going into the system (So) is 137 mg/L, that the bCOD leaving the system (S) is 16.3 mg/L, and that the mass of cells produced per day (Pxvss) is 277.4 kg/d. Express your answer in kg/day and round to the nearest integer.arrow_forward
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