ESolutionsTechReport_FINAL

ESolutionsTechReport_FINAL - Figure 1 Cross section of an...

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Figure 2. Cross section of an interior girder at midspan. Figure 1. Cross section of an interior girder at the support. One-Span Bulb Tee Spliced Girder Bridge California State University Sacramento Department of Civil Engineering CE 168, Prestressed Concrete Team: E Solutions Charlow Arzadon, Gil Vazquez, Andrew Huang, and Crysten Samudio Dr. Matsumoto, Professor Report Due: December 17, 2010 1
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Table of Contents Executive Summary 1 Introduction 2 Design/Analysis 2 Cost 10 Materials 10 Results 10 Conclusion 13 References 14 Appendix A. General Plans A-1 B. Load Calculations A-2 C. Shear Calculations A-3 D. Powerpoint Presentation A-4 E. Presentation Handout A-5 F. Original Proposal A-6 2
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G. CD of Spreadsheet Analysis A-7 Executive Summary To explore spliced girders, the program CONSPLICE was used to design a 200-ft simple-span bridge. The bridge design specifications used were AASHTO LRFD codes. The 200-ft span was chosen taking into consideration that precast girders are usually transported in a limited length of 150 ft. E Solutions proposes to use type PCI BT-96 (see Figures 1 and 2) spliced girder over the 200 ft span Main Street Bridge. The bridge will have a width of 50 feet with two vehicle lanes, shoulders, and a pedestrian walkway with separating barriers. The superstructure system will have three pretensioned segments, with a 50 ft length segment near each abutment and a 100 ft length drop-in segment in the middle. The girders were design using the program CONSPLICE. The results were verified using custom spreadsheets. Table 1. Main Street Superstructure Design Summary Number of Girders 7 girders Number of Post-tensioning tendons 5 tendons Number of Strands per Tendon 20 - 0.5 inch diameter lolax strands Number of prestressing strands 12 - 0.5 inch diameter lolax strands Number of shear reinforcement 200 – Double leg # 4 rebar Splice length 2 ft Amount of concrete in girders 407 cu. yds. of concrete (f’c = 5000 psi) Amount of concrete in slab 262 cu. yds. of concrete (f’c = 5000 psi) Amount of concrete in barriers 73 cu. yds. of concrete (f’c = 5000 psi) Cost per Sq. ft. of bridge (per Comparative Bridge Cost) $240.00 3
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Total Cost $2.4 M Introduction The use of prestressed concrete in bridge design have increased rapidly because of its good structural performance, economic benefits, constructability, and because it requires minimal maintenance. One main application of prestressed concrete is precast prestressed spliced girder superstructure. Spliced girder system is used mainly due its great contribution to constructability of longer span bridges. To study spliced girders, use CONSPLICE along with AASHTO LRFD Bridge Design Specifications to design a simple-span spliced girder bridge, verify results by hand calculations along with custom spreadsheets, discuss constructability concepts, and perform a preliminary cost estimate of the bridge superstructure are the main objectives of this project.
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This note was uploaded on 05/22/2011 for the course CIVIL ENGI 101 taught by Professor Merrayan during the Spring '11 term at CSU San Bernardino.

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ESolutionsTechReport_FINAL - Figure 1 Cross section of an...

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