Sunday, November 30, 2008
Wednesday, November 26, 2008
Video Clip: Popsicle Bridge Testing using a UTM at DLSU CE Lab
Friday, November 21, 2008
Shapes play a major role in the behavior of structures. Observed that because of the stable upright triangular shape, the Pyramids of Egypt and the Eiffel Tower have remained structural wonders. In earthquake design of structures, rectangular and upright triangular shaped buildings and towers are more preferred because of their regular shape. To build tall skyscrapers like the Taipei 101, the floor area has to be reduced as it goes up. An inverted triangle is the worst type of configuration for a building because it will behave like an inverted pendulum where the inertia forces will be concentrated at the top and there is very little resistance to lateral movements. The overturning moment will be too large such that it can easily be toppled down. Irregularly shaped structures, of course, can still be built provided they are properly modelled, analyzed and designed.
Tuesday, November 18, 2008
Inspired by the Humpty Dumpty music, I created a short video clip about the damaged buildings during the 1990 Luzon Earthquake. Humpty Dumpty here represents Luzon and its damaged structures. Perhaps, nursery rhymes and children songs may be a good way of introducing Disaster Awareness and Preparedness to kids.
The idea of this blog was inspired from Henry Petroski’s book, “To Engineer is Human.” Petroski argues that “the ideas of engineering are in our bones and part of our human nature and experience.” This is a good book specially for non-technical people who wants to understand concepts of engineering design.
Friday, November 14, 2008
Friday, November 7, 2008
Bridge building is a fun and challenging activity. By applying basic strength of materials and bridge design principles, a little creativity and a lot of patience, you can create your own masterpiece similar to the CES bridges shown. So why not test your skills on popsicle stick bridge building by joining the 5th DLSU CES Bridge Building Competition? The competition is open to all civil engineering students in the Philippines. The best bridge design wins P5,000. The bridge with the largest “stiffness/weight ratio” wins P10,000. Check-out the rules in the ads shown in this blog site.