## 20130917

### Take Home Quiz ;-)

Note: This was updated on 9/17/13 at 8:00 PM.

This is a take home quiz that I gave my students 10 13 days to complete on their own. To encourage independent work, I based the parameters they were going to use on their "student numbers." If you are a practicing structural engineer, go ahead and choose from the values listed below and try to answer the questions yourself.

Problem 1 GEF calculation (50%)
If a student number were of this format: YEAR-BCDFG, for Problem #1 they should take note of the following instructions.
1. If B is odd, they will assume a concrete MWFRS. Otherwise, assume a steel MWFRS.
2. CD represents the height of the building in meters. For example, if my student number is 2013-05852, 58 meters is my building height.
3. FG represents the gust wind speed experienced at the site, in m/s. For the same example student number above, 52 m/s is the gust wind speed. However, a gust wind speed lower than 5 m/s shall not be used.
4. The building is square in plan, and its side width is the same as its height, except that the side width shall not be taken to be more than 30 meters.
Problem #1 itself goes as follows.
Create a spreadsheet of your own using Microsoft Excel, Google Docs Spreadsheets, or Apple iWork Numbers that calculates the gust effect factor for buildings according to the NSCP 2010. You may also use any programming language except VBA. (VB is okay but not VBA!) You can also calculate manually, and just make sure to send your calculations as a PDF.
Assuming sub-urban terrain, calculate the gust effect factor for the building you were assigned. Note that you need to have good estimates of natural frequency and damping ratio to arrive at a gust effect factor. Compare your estimated gust effect factor with the gust effect factor for rigid buildings and discuss the difference (if any). Submit your spreadsheet/calculations highlighting your results, and including the required discourse/discussion.
For their aid, they can also just use this table:

 Student No. Primary MWFRS h (m) V (m/s) B, L (m) 2009-26278 Steel 62 78 30 2010-78269 Concrete 82 69 30 2010-04118 Steel 41 18 30 2009-31801 Concrete 18 5 18 2009-17715 Concrete 77 15 30 2010-78802 Concrete 88 5 30 2009-39212 Concrete 92 12 30 2009-41743 Steel 17 43 17 2009-21828 Steel 18 28 18 2009-21829 Steel 18 29 18 2009-12110 Concrete 21 10 21 2009-13764 Concrete 37 64 30 2009-16567 Concrete 65 67 30 2010-32353 Concrete 23 53 23 2009-04601 Steel 46 5 30 2008-18611 Concrete 86 11 30 2009-20380 Steel 3 80 3 2009-56979 Concrete 69 79 30 2009-78516 Concrete 85 16 30 2009-23533 Steel 35 33 30 2008-52044 Concrete 20 44 20 2009-25444 Steel 54 44 30 2009-30603 Concrete 6 5 6 2009-26579 Steel 65 79 30 2009-03715 Steel 37 15 30 2009-53075 Concrete 30 75 30 2009-35034 Concrete 50 34 30 2009-51469 Concrete 14 69 14 2009-00951 Steel 9 51 9 2009-08370 Steel 83 70 30 2009-31880 Concrete 18 80 18 2010-11381 Concrete 13 81 13 2009-24607 Steel 46 7 30 2008-16128 Concrete 61 28 30 2009-62495 Steel 24 95 24

Problem 2 Other fields of wind engineering (35%)
Based on a very recent 27-minute presentation on different aspects of wind engineering, list down the 9 aspects of wind engineering presented (3 applications, 3 fields of study, and 3 tools), and discuss which one for you is the most interesting aspect of wind engineering other than structural wind engineering. Make sure to state why you chose that aspect of wind engineering.

Problem 3 New things you have learned (15%)
Based on what you've been reading from this blog so far (for practicing structural engineers / readers) or based on what you've gathered so far from this introductory course on structural wind engineering (CE 197 for UP ICE students this semester), list down the top 10 most important new things you've learned. Discuss why they are the top 10 most important to you.

For my students, submit all responses to engg@ronjie.com by 1:00 pm of agreed submission date. For practicing structural engineers and readers of this blog, you can post your responses/answers in the comments. :-)

Kevin18 said...

Hi sir! Ano po yung 'E' sa equation for Rb? Wala po kasi siyang notation sa section ng wind loads. Thanks sir

ronjiedotcom said...

Erratum yon. Wala dapat E sa equation.

Kevin18 said...

Sir last thing na lang po.email address niyo po yung engg@ronjie.com? Doon namin sir isusubmit yong exams po namin.

ronjiedotcom said...

Mukhang yun ang sabi sa instructions.