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You are designing a pedestrian bridge to cross a busy urban street. The bridge connects an open plaza on one side of the street with a group of office buildings on the other. The estimated dead loads for the bridge deck are
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Learn your wayIncludes step-by-step video
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Chapter 5 Solutions
Foundation Design: Principles and Practices (3rd Edition)
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- The single degree of freedom system shown in Figure 3 is at its undeformed position. The SDOF system consists of a rigid beam that is massless. The rigid beam has a pinned (i.e., zero moment) connection to the wall (left end) and it supports a mass m on its right end. The rigid beam is supported by two springs. Both springs have the same stiffness k. The first spring is located at distance L/4 from the left support, where L is the length of the rigid beam. The second spring is located at distance L from the left support.arrow_forwardFor the system shown in Figure 2, u(t) and y(t) denote the absolute displacements of Building A and Building B, respectively. The two buildings are connected using a linear viscous damper with damping coefficient c. Due to construction activity, the floor mass of Building B was estimated that vibrates with harmonic displacement that is described by the following function: y(t) = yocos(2πft). Figure 2: Single-degree-of-freedom system in Problem 2. Please compute the following related to Building A: (a) Derive the equation of motion of the mass m. (20 points) (b) Find the expression of the amplitude of the steady-state displacement of the mass m. (10 pointsarrow_forwardAssume a Space Launch System (Figure 1(a)) that is approximated as a cantilever undamped single degree of freedom (SDOF) system with a mass at its free end (Figure 1(b)). The cantilever is assumed to be massless. Assume a wind load that is approximated with a concentrated harmonic forcing function p(t) = posin(ωt) acting on the mass. The known properties of the SDOF and the applied forcing function are given below. • Mass of SDOF: m =120 kip/g • Acceleration of gravity: g = 386 in/sec2 • Bending sectional stiffness of SDOF: EI = 1015 lbf×in2 • Height of SDOF: h = 2000 inches • Amplitude of forcing function: po = 6 kip • Forcing frequency: f = 8 Hzarrow_forward
- A study of the ability of individuals to walk in a straight line reported the accompanying data on cadence (strides per second) for a sample of n = 20 randomly selected healthy men. 0.95 0.85 0.92 0.95 0.93 0.85 1.00 0.92 0.85 0.81 0.78 0.93 0.93 1.05 0.93 1.06 1.08 0.96 0.81 0.96 A normal probability plot gives substantial support to the assumption that the population distribution of cadence is approximately normal. A descriptive summary of the data from Minitab follows. Variable cadence Variable N Mean 20 cadence 0.9260 Min 0.7800 Median 0.9300 Max 1.0800 TrMean 0.9256 Q1 0.8500 StDev 0.0832 Q3 0.9600 SEMean 0.0186 (a) Calculate and interpret a 95% confidence interval for population mean cadence. (Round your answers to two decimal places.) strides per second Interpret this interval. ○ with 95% confidence, the value of the true mean cadence of all such men falls inside the confidence interval. With 95% confidence, the value of the true mean cadence of all such men falls above the…arrow_forwardWhat is the purchase quantity of 2 x 6 rafters needed for the roof and how many pieces of ridge shingles are needed for the roof? The slope of the roof is 4:12 and the exposure is 5 inches wide. arrow_forwardFor the system shown in Figure 2, u(t) and y(t) denote the absolute displacements of Building A and Building B, respectively. The two buildings are connected using a linear viscous damper with damping coefficient c. Due to construction activity, the floor mass of Building B was estimated that vibrates with harmonic displacement that is described by the following function: y(t) = yocos(2πft). Figure 2: Single-degree-of-freedom system in Problem 2. Please compute the following related to Building A: (a) Derive the equation of motion of the mass m. (20 points) (b) Find the expression of the amplitude of the steady-state displacement of the mass m. (10 pointsarrow_forward
- The direction of the force F_11 is __________LB. The magnitude of the force F_11 is __________LB.arrow_forwardIn the figure below, assume that complete mixing occurs between the two inflows before the mixture discharges from the pipe at C. Find: a. the mass flow rate in pipe C b. the velocity in pipe C Closed tank A c. the specific gravity of the mixture in pipe C Q=3 cfs SG=0.95 Diameter 6 in. Q = 1 cfs SG=0.85 B Diameter 4 in. Diameter 6 in. Q= 4 cfsarrow_forwardMANUALLY DRAW THE FLOW NET. SHOW THE SCALE USED. do not just explain how to draw it, give me a completed flow net.arrow_forward
- In a simulation experiment on a single lane road, one vehicle is travelling at 18 m/s.After 1.5seconds, the vehicle suddenly accelerates at a rate of 1.5 m/s2 for the next2 seconds and remains0 acceleration then after. Simulate the behavior of subsequent vehicle with an initial speedof16 m/s using GM car following model for the first 3 seconds if the initial distanceheadwayis 20 m. Tabulate the results. Assume headway exponent 1.2, speed exponent1.5, sensitivitycoefficient 0.8, reaction time 0.6 seconds, and update interval of0.3 seconds.arrow_forwardFORWARD FROM POINT B TO POINT A GIVEN THE FOLLOWING: POINT BN=13,163,463.03'E=3,072,129.30' DIRECTION FROM B TO A (NAZ)=276.07529° DISTANCE FROM B TO A = 10.00'arrow_forwardIt proposed to provide pile foundation for a heavy column; the pile group consisting of 4 piles. placed at 2.0 m centre to centre, forming a square pattern. The under-ground soil is clay, having cu at surface as 60 kN/m², and at depth 10 m, as 100 kN/m². Compute the allowable column load on the pile cap with factor of safety of 3.0, if the piles are circular having diameters 0.5 m each and length as 10 m.arrow_forward
- Traffic and Highway EngineeringCivil EngineeringISBN:9781305156241Author:Garber, Nicholas J.Publisher:Cengage LearningArchitectural Drafting and Design (MindTap Course...Civil EngineeringISBN:9781285165738Author:Alan Jefferis, David A. Madsen, David P. MadsenPublisher:Cengage LearningConstruction Materials, Methods and Techniques (M...Civil EngineeringISBN:9781305086272Author:William P. Spence, Eva KultermannPublisher:Cengage Learning
- Fundamentals Of Construction EstimatingCivil EngineeringISBN:9781337399395Author:Pratt, David J.Publisher:Cengage,Solid Waste EngineeringCivil EngineeringISBN:9781305635203Author:Worrell, William A.Publisher:Cengage Learning,Materials Science And Engineering PropertiesCivil EngineeringISBN:9781111988609Author:Charles GilmorePublisher:Cengage Learning
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