unity and performance for dynamic analyses of structures in multi region

1995年1月17日的地震，即众所周知的兵库县南部地震，造成了广泛的建筑物破坏。在许多倒塌或损坏的建筑物中，存在着一些与以往地震破坏不同的结构破坏类型。它们是钢筋混凝土和钢结构中的柱的水平断裂、8-9层以内的中高层建筑的中间层倒塌以及钢结构高层建筑中的特厚柱的水平破坏。特别是芦屋滨住宅钢结构高层建筑中特厚钢柱的水平破坏，是结构工程师最感兴趣的破坏。与标准抗震设计规范相比，该建筑在日本技术水平较高，结构形式也很简单。有14层、19层、24层、29层四种类型，除建筑高度不同外，均由相同的结构框架组成。本文仅对24层结构进行了研究，因为这一结构类型的破坏是这些建筑中最显著的。这种破坏的原因被认为与日本乃至世界抗震设计中的共同问题密切相关，因此有必要澄清。本文从多方面调查的角度阐述了研究的目的，芦屋滨高层钢结构住宅目前损坏的原因。并从这一根本原因出发，指出了为防止结构的现代破坏，抗震设计必须改进的重要课题。

The earthquake of 17 January 1995, as well known as the Hyogo-ken Nanbu Earthquake, caused extensive damages of structures. Among many collapsed or damaged buildings, there are some types of structural damages being different from past earthquake damages. They are horizontal breaking of column in reinforced concrete and steel structures, collapse of the middle story at medium tall buildings within 8-9 stories, and horizontal failure of very thick column in steel tall building,Especially, the most interesting damage among these collapsed or damaged structures for structural engineers may be horizontal failure of very thick steel column on Ashiyahama residential high-rise steel building. This building is designed on technically high level in Japan, as compared with standard earthquake-resistant design code, and its structural form is also very simple. There are four types of 14, 19, 24, and 29 stories, in which they consist of same structural frames except for the difference of building's height. This research concerns on only structure of the 24 stories because the damage of this structural type is the most notable among these buildings.It is necessary to clarify the cause of why such a failure is occurred because it is considered to be related closely with the common problem in earthquake-resistant design in not only Japan but also universally world.The aim of this research is stated from the point of many-sided investigation, the cause of current damage of Ashiyahama residential high-rise steel building. Also, important subject that must be improved on earthquake-resistant design to prevent current damage of structures is pointed out from this prime cause.