how can i design a bridge with this girder?
Subject CSM20001: Design of Constructed Structures General Instructions All final design submissions must be completed on computation sheets (non-Swinburne University computation sheets are acceptable). The first page of your design must be marked A and is a title page, containing the name of the person(s) responsible for the submission, and the project title. The second page marked B is the index of the succeeding pages of computations and sketches. The following pages should be numbered consecutively, the number including the total number of pages. For example 4/21, 4 of 21, fourth page of a total of 21 pages. The following sequence of paragraph headings is suggested. These depend on the type of structure and load conditions, but they should reflect the logical sequence of gathering of information and its subsequent use: 1. Codes, references, and general requirements 1.1 Codes a) AS3600 - Concrete Structures b ) ... 1.2 References a) 1.3 General Requirements a) Concrete Strength b ) Cover Requirements 2. Layout C (Include a brief description of the structure, sketches, and a marking plan) 3. Loads 3.1 Dead Loads 3.2 Live Loads 4. Computation of Design Actions (Load combinations, design loads, BMDs, SFD, etc.) 5. Design 5.1 Girders in bending 5.1.1 Positive Bending design (midspan) 5.1.2 5.1.3 Negative bending design (over central support) Shear Design (at distance do left and right of central column) 5.1.4 Shear Design (at distance do from supports 1 & 3) 5.2 Column Design 5.2.1 Central column 5.2.2 Edge Column 5.3 Detailing 5.3. Submission You should form yourselves into groups of two. There should be a single submission (one report) per group as per above format. The deadline for the submission is 23:59 Friday 21st September. 2018 This project accounts for 20% of the total subject assessment. Swinburne University of Technology Page 3
Subject CSM20001: Design of Constructed Structures The task does not require you to calculate any external dimensions of slabs, beams or columns. The architect has set the dimensions of the concrete profile and you are constrained with them. All slab depths, beam widths and depths, and column dimensions have been provided in Figure 1. As a part of the design, you are required to check the adequacy of these dimensions, and document the reinforcement required, in accordance with AS3600-2018. Design Criteria The following criteria must be adhered to: (a) All concrete to be of 28 day strength fc = 32 MPa. (b) All reinforcing steel to be class N with 500MPa yield strength (c) All reinforced concrete to be designed for a fire resistance period of 120 minutes. (d) The office is located in Hawthorn, Victoria. (e) An analysis of the loads has determined that the girder is required to take an unfactored dead load (G) of 10 kPa (excluding self weight) and live load (Q) of 40 kPa. Important Notes All the lateral loads from wind and earthquakes are to be ignored. You are not required to design for lateral loads due to wind and earthquakes. Start your design by determining the required cover for durability and fire in order to get the effective depths for the slab, beam and columns. In order to estimate the design actions, use appropriate load combinations listed in AS/NZS1 170.1 and in AS3600. Use approximate methods of analysis to determine bending moments and shear forces in the frame. Insert hinges to reduce structural indeterminacy Ensure bar spacing and general detailing of reinforcement in accordance with AS3600 are followed (for example, refer to Section 10.7.3 of AS3600 for detailing of column ties). Design the beams slabs and columns for bending, shear and axial loads and determine the amount of steel reinforcement required to resist the critical design actions. Detail your solution in the form of drawings. Swinburne University of Technology Page 2
Subject CSM20001: Design of Constructed Structures Assignment No 1: Design of an RC bridge girder Submission Date: Friday 8th November, 2019 Problem: An existing reinforced concrete box bridge girder is to be assessed for a proposed increase in vehicle loads. Consider the existing 2 span box-girder with the following geometry: 1500 150 150 150 500 800 Cross section of girder 9750 9750 800 500 600 500 4300 Elevation of girder Figure 1 - Cross section properties Each span is supported by columns and spans a total length of 9750mm. Swinburne University of Technology Page 1
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