In response to Member suggestions, and with the help of the Geotechnical Society and the Society of Earthquake Engineering, fact sheets have been prepared giving an overview of the earthquake and performance of engineered systems, liquefaction and the building safety evaluation process. The attached PDF file contains these and we encourage you to share it with your networks.
GNS Science believe that the earthquake arose from the rupture of an 8 x 8 km fault running east-northeast at
a depth of 1-2 km depth beneath the southern edge of the Avon-Heathcote Estuary and dipping southwards at
an angle of about 65 degrees from the horizontal beneath the Port Hills. The amount of slip between the two
sides of the fault was up to 1.5 m. The Port Hills have risen by about 40 cm, the mouth of the estuary has moved
westward by a few tens of cm, and the land just north of the estuary by tens of cm to the east. Land west of the
estuary, and the estuary itself, will have sunk by roughly 10 cm as a direct result of the fault rupture. However,
there may be additional subsidence on top of this as a result of ground compaction during the strong shaking.
Earthquake records show that some buildings may have experienced shaking more than two times more intense
than a new building would be currently designed for, but perhaps for a lesser duration than envisaged by the
loadings code (NZS 1170.5). The intensity of shaking appears to have died out rapidly as it travelled westwards
from the fault.
.......................................
The two buildings which have catastrophically collapsed
(the Pyne Gould Corproration and CTV buildings), while described by the press as modern, are understood to
have been constructed in about 1963 and 1986 respectively. Many buildings designed before the early 1980s
may have experienced earthquake loads significantly above that for which they were designed. Nevertheless,
many of them have experienced no or minimal structural damage. A number of experienced structural engineers
have observed that buildings with well-conceived and simple structural systems with minimal irregularities
have exhibited superior performance to those which may have only nominally or theoretically met codified
requirements. 作者: chrise 时间: 2011-3-4 17:02:07
helpful info. thanks作者: 马小哈 时间: 2011-3-4 18:20:18
求翻译 {:7_357:}作者: songinator 时间: 2011-3-4 22:15:06
看了下 不错 有疑问可以问我作者: rosy258 时间: 2011-3-5 00:47:02
Dr Andrew Cleland， 原来Massey的吧作者: songinator 时间: 2011-3-5 01:29:49
Dr Andrew Cleland， 原来Massey的吧
rosy258 发表于 2011-3-5 00:47
