Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
On Tuesday, August 23, 2011 the mid-Atlantic area was shaken by a magnitude 5.8 earthquake centered near Mineral, Virginia. Events of this magnitude are highly unusual for the region around the nations capital. Fortunately the effects of quake were generally mild and caused only modest amounts of structural damage to buildings and other structures. One structure that did incur some significant damage was the Washington Monument. In part due to its height of slightly more than 555 feet, the upper portion of the Monument suffered several significant cracks that have forced the closure of the structure until such time as repairs can be made by the National Park Service (NPS). Since that time NPS has been actively engaged in a number of efforts to determine the extent of damage caused by the quake to not only the Washington Monument but also the numerous other monuments and memorials in the area of the Washington Mall. One area of concern was what, if any, settlement or subsidence occurred in the area of the Washington Monument and others structures to the west including the Jefferson and Lincoln Memorials. Few visitors to the sites today appreciate that all of the structures from the Washington Monument west to the Potomac River are constructed on fill of sand, gravel and blue clay. A 1950 report by the U.S. Geological Survey shows the 25 foot deep foundation of the Monument is approximately 65 feet above bedrock. This type of fill can be especially vulnerable to the effects of soil liquefaction as have been noted in numerous other earthquakes.
On Tuesday, August 23, 2011 the mid-Atlantic area was shaken by a magnitude 5.8 earthquake centered near Mineral, Virginia. Events of this magnitude are highly unusual for the region around the nations capital. Fortunately the effects of quake were generally mild and caused only modest amounts of structural damage to buildings and other structures. One structure that did incur some significant damage was the Washington Monument. In part due to its height of slightly more than 555 feet, the upper portion of the Monument suffered several significant cracks that have forced the closure of the structure until such time as repairs can be made by the National Park Service (NPS). Since that time NPS has been actively engaged in a number of efforts to determine the extent of damage caused by the quake to not only the Washington Monument but also the numerous other monuments and memorials in the area of the Washington Mall. One area of concern was what, if any, settlement or subsidence occurred in the area of the Washington Monument and others structures to the west including the Jefferson and Lincoln Memorials. Few visitors to the sites today appreciate that all of the structures from the Washington Monument west to the Potomac River are constructed on fill of sand, gravel and blue clay. A 1950 report by the U.S. Geological Survey shows the 25 foot deep foundation of the Monument is approximately 65 feet above bedrock. This type of fill can be especially vulnerable to the effects of soil liquefaction as have been noted in numerous other earthquakes.
Project Report Leveling of the Washington Monument and the Washington Mall
D. Doyle (Autor:in)
2012
10 pages
Report
Keine Angabe
Englisch
Civil Engineering , Construction Equipment, Materials, & Supplies , Construction Materials, Components, & Equipment , Soil & Rock Mechanics , Recreation , Natural Resources & Earth Sciences , Geotechnical engineering , Earthquake engineering , Ground motion , Seismic design , Structures , Washington Monument(Washington DC) , Washington Mall(Washington DC)
| Engineering Index Backfile | 1934
George Washington : man and monument
| UB Braunschweig | 1960