Lecture 25 (December 2)

Lecture 25 (December 2) - 1. Unreinforced masonry o Brick,...

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1. Unreinforced masonry o Brick, mud brick (adobe), stone Fall down if shaken; no shear resistance o Also called URM or POR—piles of rubble 2. Non-ductile reinforced concrete buildings o Most common building design in the world o Steel reinforcing bar (“Re Bar”) 3. Ductile reinforced concrete buildings o Can deform without breaking o Main difference between ductile and non-ductile is the amount of steel rebar “confinement” and stronger column-to-beam connections (key that it stays at 90 ° ) 4. Steel-framed buildings o Expensive 5. Wood-framed buildings o Basically shear walls; extremely rigid Issue of earthquake safety and cost o You can always make a building more earthquake resistant, but at increased costs Jericho o Been building unreinforced masonry structures at least 10,000 years ago These buildings have always been falling down during eqs o Oldest city in the world o Next to the Dead Sea So salty, nothing can live in it Never flows to the ocean, water evaporates and salt stays there
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Lecture 25 (December 2) - 1. Unreinforced masonry o Brick,...

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