Haiti is not the wealth of works is blind, no project is illusory wealth

 16 years ago, Northridge, California earthquake, magnitude 6.7, 60 people died, and made the same as the heavens, which also studies that have studied, also what performance-based seismic design before moving out to scare .15 Japan Kansai Kobe earthquake, magnitude 6.9, 5 thousand people died, is an incredible catastrophe .11 years ago, Chi-Chi earthquake in Taiwan, 7.7, almost 5 thousand fellow victims, disaster unprecedented .2 years ago, earthquake, magnitude 8.0, my 8 million compatriots died, the whole nation mourning. Today, Haiti, 7.0, is expected to nearly 20 million people killed! Although the number of victims of an earthquake with magnitude, time of occurrence, population density and other factors related, but not very clear yet? almost determines the level of economic earthquake death toll.
rely on the economic level is determined the number of deaths? I think one very important aspect is the level of earthquake-proof building structure ! This shows the earthquake engineering practice and research are? If there is no earthquake engineering research, the money can reduce earthquake casualties? I think not necessarily. whether the development of earthquake engineering, or economic development, are not against the independent and earthquakes.
Photo: AP
Haiti's presidential palace was a serious two-tier structure, so not bad money, and simple construction in the modern seismic technology seems not much to say. It Discard the earthquake too much, as that is too far behind in Haiti.
Photo: Reuters
the top of the frame structure being left out of story drift estimates are 1 / 3 of the. how to see how I feel this way thin column can never be achieved only in our minds . This type of collapse mechanism can be regarded as a whole, but compared with the layer mechanism, tragic even harder!
Photo: Washington Post
like structure behind a reinforced concrete frame, and also the layers of film together look.
Photo: Gerel Pedre via Twitter
familiar diagonal crack the wall between the windows. relatively light damage.
Photo: Washington Post
in Haiti, in addition to breaking the puzzle into a pile of rubble outside the structure, probably on a number of seismic damage of reinforced concrete frame structure was the worst.
Photo: AP
masonry structure, do not know that there are several layers, anyway, except now only a part of the next layer .
photos collected from the current point of view, Haiti earthquake damage of reinforced concrete frame structure is also very serious. and Tian in 2008, the U.S. Congress have pointed out structural engineering, reinforced concrete frame structure in the world within large number of applications is a huge potential risk. Sure enough, whether for architectural concept for the pursuit of simplicity, or a structural point of view on the ductility and blindly rely on computational analysis, reinforced concrete frame structure appears to have a strong vitality in the world , but it appears so strong earthquake vulnerability.