Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Chapter 20, Problem 18P
To determine
Whether the slab thickness is adequate for the tensile stresses or not according to AASHTO.
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a) A 14-ft. tall and12-ft.-8-in. long fully grouted reinforced masonry wall is constructed of 8-in.CMU. It is to be analyzed for out-of-plane loading. Construct thenP -nM curves for the wallwith the following three vertical reinforcement scenarios: (1) 10 No. 6 bars at 16 in. spacing,(2) 10 No. 5 bars at 16 in. spacing, and (3) 7 No. 4 bars at 24 in. spacing. The steel is Grade60 with a modulus of elasticity of 29,000 ksi, and the masonry has a compressive strength of2,000 psi. You may use Excel or Matlab to construct the curves. Also, show the maximumnPallowed by the code for each case.(b) For each of the above reinforcement scenarios, determine the maximum axial loads that arepermitted for the tension-controlled condition and transition condition.(c) Discuss how the amount of vertical reinforcement affects thenPn-Mn curve.
YOU HAVE SET YOUR LEVEL UP AND ARE UTILIZING CP-101 ELEVATION FOR YOUR BENCHMARK AND HAVE THE FOLLOWING READING:CP-101=6.02YOUR FORM ELEVATION READINGS ("ATTACHED")( BEGINNING AT THE NORTHEAST BUILDING CORNER)AND WORKING IN A CLOCKWISE DIRECTION CHECKING THE BUILDING CORNER FORMSARE AS FOLLOWS: (CALCULATE THE ELEVATIONS OF 1-6 BELOW)
1. NE COR. = 1.152. SE COR. = 1.153. SW COR. = 1.354. (N) SW COR. = 1.155. INTERIOR = 1.306. NW COR. = 1.15
a) A 14-ft. tall and12-ft.-8-in. long fully grouted reinforced masonry wall is constructed of 8-in.CMU. It is to be analyzed for out-of-plane loading. Construct thenP -nM curves for the wallwith the following three vertical reinforcement scenarios: (1) 10 No. 6 bars at 16 in. spacing,(2) 10 No. 5 bars at 16 in. spacing, and (3) 7 No. 4 bars at 24 in. spacing. The steel is Grade60 with a modulus of elasticity of 29,000 ksi, and the masonry has a compressive strength of2,000 psi. You may use Excel or Matlab to construct the curves. Also, show the maximumnPallowed by the code for each case.(b) For each of the above reinforcement scenarios, determine the maximum axial loads that arepermitted for the tension-controlled condition and transition condition.(c) Discuss how the amount of vertical reinforcement affects thenPn - Mn curve.
Chapter 20 Solutions
Traffic and Highway Engineering
Ch. 20 - Portland cement concrete consists of what four...Ch. 20 - List and briefly describe the five main types of...Ch. 20 - What is the main requirement for the water used in...Ch. 20 - Prob. 4PCh. 20 - Prob. 5PCh. 20 - Prob. 6PCh. 20 - Prob. 7PCh. 20 - Prob. 8PCh. 20 - Prob. 9PCh. 20 - Prob. 10P
Ch. 20 - Prob. 11PCh. 20 - Prob. 12PCh. 20 - Repeat Problem 20-12, with the slab containing...Ch. 20 - Prob. 14PCh. 20 - Prob. 15PCh. 20 - Prob. 16PCh. 20 - Prob. 17PCh. 20 - Prob. 18PCh. 20 - An existing rural 4-lane highway is to be replaced...Ch. 20 - Prob. 20PCh. 20 - Prob. 21PCh. 20 - Prob. 22PCh. 20 - Prob. 23PCh. 20 - Prob. 24PCh. 20 - Prob. 25PCh. 20 - Prob. 26PCh. 20 - Prob. 27P
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- If you could help me answer these questions in matlab that would be great, I provided an additional picture detailing what the outcome should look like.arrow_forwardA fully grouted reinforced masonry wall is to be constructed of 8-in. CMU. The wall height is 18feet. It is assumed to be simply supported. The wall is to be designed for an out-of-plane seismicload of 52 lbs./ft.2, which can act in either direction. The wall also supports a roof dead load of600 lbs./ft. and a roof live load of 300 lbs./ft. along the wall length. The roof loads have aneccentricity of 2.5 inches. Since there is seismic load, load combinations (6) and (7) in Chapter 2of ASCE 7-22 should be considered. In these two load combinations,horizontal seismic loadhE =andvertical seismic loadvE = . You may ignorevE in this problem for simplicity. The masonryhas a specified compressive strength of 2,500 psi. (a) Use the strength design provisions of TMS402 to determine the size and spacing of the vertical bars needed. Use the P-δ analysis method inSection 9.3.4.4.2 of TMS 402 to determine Mu. (b) Repeat the design using the momentmagnification method in Section 9.3.4.4.3 instead.arrow_forwardThe factor of safety for tipping of the concrete dam is defined as the ratio of the stabilizing moment due to the dam's weight divided by the overturning moment about OO due to the water pressure (Figure 1). Suppose that aa = 5 mm , dd = 2 mm , hh = 7 mm . The concrete has a density of ρconcρconc = 2.5 Mg/m3Mg/m3 and for water ρwρw = 1 Mg/m3Mg/m3arrow_forward
- can you answer both plss, i will give u a likearrow_forward*1-4. The hollow core panel is made from plain stone concrete. Determine the dead weight of the panel. The holes each have a diameter of 100 mm. 200 mm 300 mm 300 mm 300 mm 300 mm 300 mm Prob. 1-4 300 mm 4 marrow_forwardderive the expressions for V and M, and draw the shear forceandbendingmomentdiagrams.Neglecttheweightofthebeam.arrow_forward
- a. Draw trajectories of approximately 8 to 11 vehicles moving on a one way 1-lane road with different time-varying speeds. b. Consider a time-space window in the time-space diagram of part (a). See below. Denote the number of vehicles passing BD, DC, AC, and AB respectively as n1, N2, N3, and n4. Write an equation relating n₁, N2, N3, and n4 to each other. What is the physical intuition of this equation? Please elaborate. X 4 X. n4 n3 с n2 X1 D B n1 t c. Using density (k) definition at time instances t₁ and t₂ and flow (q) definition at locations X1 and X2, rewrite equation of interest in part (b) to demonstrate KAB-KCD 9BD-9AC + t₂-t1 x2-x1 = 0. d. What will be the equation in part (c), in case of x2 → x1 and t₂ → t₁.arrow_forwardConsider a city center where the traffic conditions are described by a Macroscopic Fundamental Diagram (MFD) of network outflow (g- rate of trips finished) vs. accumulation (n- number of cars) with a trapezoidal shape, as shown in the figure below. The values of the parameters are: • • maximum trip completion rate gmax=100 [veh/min] critical accumulations ncr1=1000 [veh] and ncr2=1500 [veh] jam accumulation njam=4000 [veh]. gmax ncr1 ncr2 njam There are two types of demands in the morning peak hour (7-8am): trips generated from outside the city center with rate q1=80 [veh/min], and trips generated from within the city center with rate q2=50 [veh/min]. In addition, a perimeter traffic control, u, is available that only restricts vehicles entering the city from outside. If at 7am there are already no=500 [veh] in the city center: a. Write the dynamic equations (mass conservation equation) in a continuous form for the center of the city. b. Convert the continuous dynamic into the discrete…arrow_forwardAssume a car park facility where the arrival rate is 1 customer every minute, and the service process including pressing the button, taking the card, and waiting for the boom to rise leads to service rate of μ customer every minute. a. Assume the arrival and service processes are stochastic. Using any software (Excel, Matlab, or the one you prefer), plot average delay time (including service time) and average queue size (including the vehicle currently being served) for all combinations of λ = {1,2,3,..,10} and p = {0.1,0.3,0.5,0.7,0.9}. Specifically, we ask you to make 2 graphs (one for average delay and the other for average queue size), where the x-axes contains the different values for 1, and where you make one curve for each p. b. Assume the arrival process is stochastic but the service process is deterministic with rate μ. Using any software (Excel, Matlab, or the one you prefer), plot average delay time (including service time) and average queue size (including the vehicle…arrow_forward
- A traffic signal has a 60-second cycle length (Red time + Green time). For the travel direction of interest, the red and green times are 30 seconds each, the arrival rate is constant at 20 [veh/min] and the saturation flow (i.e., the departure rate) is 1 [veh/sec]. a. Calculate the average delay (for all vehicles) for the travel direction of interest. b. Assume a work zone on the street downstream of the intersection so that only 25 [veh/min] (in the direction of interest) can pass. Calculate the average delay caused by the work zone to a vehicle leaving the intersection. Assume that the queue at the work zone never backs- up into the intersection. c. Discuss qualitatively the implications of queue spillback from the work zone on the delay of the system. Traffic Direction (a) Traffic Direction (b)arrow_forwardAttached pics is a sample problem, can you compute it for me, I just want to compare my answer. Thank you.arrow_forwardProblem 2: The Douglas fir beam below supports uniform live (WL) and dead loads (WD) as shown below. Assume the total distributed load is 700 lb/ft. WD=300#/PT. W₁ = 400# W₁ = 400#/FT- J J J J I J J J L=161 a) Assuming an alllowable deflection of L/360, compute the magnitude of the allowable deflection. b) Using an 8"x12" timber beam (see Table A1-b on page 567 of your text for properties) compute the actual deflection. Assume E = 1.6 x 100 psi. c) Based on your answers for parts a and b, determine if an 8"x12" timber beam is safe for this applicationarrow_forward
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