Introduction to Sustainable Civil Engineering Design
1st Edition
ISBN: 9780134013916
Author: Neumann
Publisher: PEARSON
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Chapter 3, Problem 11EDDS
To determine
List three options that can be examined to cope with the situation of low lying area threatened by rise in sea level. Find the cost associated with these three methods.
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Introduction to Sustainable Civil Engineering Design
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- Two alternatives are under consideration for maintenance of a bridge. Select the mostcost-effective alternative using present worth analysis. Assume an interest rate of10% per year and a design life of 50 years for each alternative.Alternative A consists of annual maintenance costs of $5,000 per year for the designlife except for:Year 20, in which bridge deck repairs will cost $20,000Year 30, in which a deck overlay and structural repairs will cost $105,000Alternative B consists of annual maintenance costs of $3,000 per year for the designlife except for:Year 20, in which bridge deck repairs will cost $35,000Year 30, in which a deck overlay and structural repairs will cost $85,000arrow_forwardQuestion 3. Calculate the risk for each option below. a) A dam shall be constructed to withstand a flood that occurs once every 10,000 years. The dam is expected to have an economic life of 100 years. What is the probability of a flood exceeding the design flood over the life of the dam? b) The intended design life of a bridge is 120 years and it is designed for a flood expected to occur once in 100 years. What is the probability of seeing a flood greater than the expected one in 100 years during the bridge's design life? c) One bridge foot will be built inside the temporary cofferdam. If the cofferdam is designed for a flood that is expected to occur once in 20 years and will remain in the river for two winters, what is the probability of a flood greater than the design flood?arrow_forward(1.1) What are the differences between life cycle cost analysis (LCCA) and life cycle assessment (LCA)? (1.2) What are the key inputs and outputs of a building energy model in BEM? (1.3) List three software tools commonly used for BEM and introduce each. Also, explain what are the advantages and limitations of each tool/software.arrow_forward
- i need the answer quicklyarrow_forwardA road is being proposed to facilitate a housing development on a scenic Two alternatives have been suggested. One of the roadway alignments is to go around the lake and slightly impact a wetland. The second alternative will also go around the lake and will significantly impact two wetlands. The following table shows the anticipated costs for each alternative. Assuming that the annual interest rate (i) is 7%, determine which alternative is preferred using the Net Present Value method. Alternative First Cost ($) Annual Maintenance ($) Service Life (Years) Salvage Value ($) Annual Wetland Rehabilitation Costs ($) Annual Roadway Lighting Costs ($) I 75,000 3000 15 45,000 7500 1500 II 125,000 2000 15 25,000 2500 2500arrow_forward12. An engineer must choose between two technically equivalent alternatives, A and B. Based upon the data in the table below and an interest rate of 9%, which alternative should be selected? A B $3,000 $6,000 $500 First Cost Annual Maintenance $300 End of Useful Life Salvage Value $700 $1,000 15 Useful Life years years a. Choose A; we want to maximize the costs O b. Choose B; we want to minimize the costs O c. Choose A; we want to minimize the costs O d. Choose B; we want to maximize the costs O e. I don't wanna choose O other:arrow_forward
- The proposed steel bridge has an indefinite life. The initial cost of the bridge is $3,750,000 and annual maintenance costs are estimated to be $25,000. The bridge deck will be resurfaced every 10 years for $900,000 and anti-corrosion paint will be applied every 5 years for $250,000. If the interest rate is 8%, what is the EUAC?arrow_forwardC) Two alternatives have been proposed to construct a new road project to improve capacity and safety. The table below explains each alternative's costs: the initial construction costs, annual operating and maintenance costs after the first year, and resurface of road costs. Assume that the annual interest rate is 5%. Determine the present worth for each alternative, then choose the preferred alternative based on the economic criteria. by present worth Alternative The initial construction costs The annual operating and maintenance costs The resurface costs Service life (years) $4.000.000 $3.900 $850,000 (Every five years) 14 $3,800,000 $4,100 $800.000 (Every four years)arrow_forwardIn point form what will be required to make a sustainable cityarrow_forward
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