Design of Concrete Structure with Essay

1370 Words 6 Pages
Figure 3 11. BBS of a Beam Bar Bending Schedule of Columns
The column’s reinforcement are not particularly similar on all floors, therefore all columns were studied floor wise. The columns are also divided in two phases per floor, similar to that of beams. The values derived from the STAAD.Pro results re percentage of steel and stirrup spacing. The percentage is multiplied with the gross area of section and the reinforcement area is achieved. STAAD.Pro aims at lesser number of bars with higher diameter, but it cannot always be sufficient, therefore the number of bars were calculated manually for all columns.
Also, STAAD.Pro does not consider lap length for the column reinforcement, and the members are designed on a single element basis.
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The columns, and design code are selected. Then, in the job created, the design properties are put. The screen shot of the same is shown in figure 555. The information regarding concrete and reinforcement detail, soil properties and dimensions of footings are entered. Fixed dimensions are used when the manual results need to be checked. Otherwise, the option is set to calculate dimensions. Figure 5 1. Properties Area in STAAD.Foundation
Then, the design is run and results are obtained. STAAD.Foundation gives the schedule of drawings, structure drawings, and concrete design calculations. The data can be complied to make the Bar Bending Schedule for the footings. The BBS for Isolated footings is attached in Appendix ABC. The design has been cross checked with the manual results. Isolated Footing
There are 9 different sizes of isolated square footings, with sizes ranging from 1.65 × 1.65 m to 3.65 × 3.65 m. The total area covered by isolated footings is 407.7 m2, which is 11.6% coverage of the total site area. The depths of the footings range from 0.4 m to 0.9 m. The soil bearing capacity has been assumed at 300 kN/ m2.
The reinforcement calculations for few footings has been attached in Appendix ABC. The figure 555 shows the plan of isolated footings for the entire structure, which was developed in STAAD.Foundation. Figure 5 2. Isolated Footings Plan in AutoCAD Raft Foundation Raft foundation is provided in

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