PCI Big Beam Project
Designed By XDFDesign Discription
The New Oriental begin to approach this project by reviewing the contest rules, assign tasks to team member, and ask technical advisor for some suggestions. In addition, information of the concrete mix is given by the sponsor company. A visit to the sponsor company gives the New Oriental a lot of information about fabrication. The project manager of Sponsor Company provides the limitation of strand spacing to two inches and the availability of ½-inch “special” strands. And only #4 and #5 of A615 steel could be used in beam design.Normal weight self consolidate concrete is used to build the beam. Wood forms are used to fabricate “I” shape beam. Moreover, the beam design must meet the provisions of ACI-318 or the 7th edition of the PCI Design Handbook.
Technical Basic Requirement
The beam must no longer than 20 feet and must be tested as a simply supported span of 18 feet, center to center of bearing. It may have any cross sectional shape but the top surface must be flat and horizontal along the entire span.
The beam shall be designed for dead load plus TWO applied service (UNFACTORED) live loads of 10 kips (i.e. in equations 9-1 through 9-7 in ACI 318-08 LL = 10 kips each). This translates to factored live loads of 16 kips at each loading point. The beam must not crack under service live load of 10 kips at each point.
The beam shall be loaded by applying two point loads, symmetrically, 7 feet from the center of each support (or 2 ft. on either side of mid-span) as shown. The loading mechanism must apply the loads equally at both points. Use of a single jack and a spreader beam to create two loads is permitted. As the Figure 1 shown:
Figure 1
Design Alternatives Options & Decision Matrices
Considering the construct convenient and efficiency, “I” shape is used to design the beam. In order to satisfy the moment capacity and shear capacity, The New Oriental make several alternatives based on “I” shape by changing the dimension of cross-section of the beam, type of concrete, number of strand, and number of reinforcement bar. Meanwhile, a design matrix is created with judge criteria, such as cost, weight, and deflection. The whole design is conduct in Excel spreadsheet. The following links are the cross-section view of each design option and the design matrix is shown in Figure 2:
Option-1: Click here
Option-2: Click here
Option-3: Click here
Option-4: Click here
Option-5: Click here
Option-6: Click here
Auto Cad Drawings of Final Design
The final design is selected from the six design options. They compare with each other in the design matrices. The decision is made based on several criteria, such as cost, weight, and deflection. The following pictures are the cross-section view and plan view of our final design. In addition, the PDF file can be download under the document page.
Gantt Chart
A detailed project development schedule is provide on the following link with critical path tasks shown in red and tasks by others shown in green. Key project milestones are summarized in the Figure 3:
Figure 3 :Click Here
This schedule is based on the following assumptions:
If Tpac, a Division of Kiewit Western Co. (Sponsoring Company) prefers to accelerate the schedule, one option is to submit final design before December 15th, 2012. However, the analysis of design performed during this time would be insufficiency. In addition, the differences between predicted results and test results might be large and complex. The quality of the design report will not be affected if the schedule is intensive.
Internal Team Budgeting
A fixed regular payment needs to be paid on an hourly basis. Based on the different job types, the different hourly rate are given to each person:
A cost of wages paid to workers during an accounting period on different sections needs to be given to before the starting of the project. Different sections have different labor costs due to the different type of work. Here is the table of labor cost:
Team Meeting Notes
The New Oriental regular meetings serve as the primary forum for understanding the project and identifying and resolving the project issues. In addition, The New Oriental coordinate technical design issues with the technical advisor, project manager of Tpac, a Division of Kiewit Western Co. (Sponsoring Company) and others through meeting and correspondence. The meeting notes is prepared during each meeting to record some important things relate to the project.