RESPONSE CONTROL OF CANTILEVERED RC WALLS IN GYMNASIA WITH ENERGY-DISSIPATION ROOF BEARINGS
RESPONSE CONTROL OF CANTILEVERED RC WALLS IN GYMNASIA WITH ENERGY-DISSIPATION ROOF BEARINGS
复制标题
带有耗能屋顶轴承的体育馆悬臂钢筋混凝土墙的响应控制
DOI：
10.3130/aijs.80.157
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
T. Takeuchi
中科院分区：
文献类型：
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作者：
Kazuhiko Narita;Yuki Terazawa;R. Matsui;T. Takeuchi
2011年东北大地震中，钢筋混凝土体育馆的钢屋面支座发生了大量的破坏，支撑屋架的钢筋混凝土悬挑墙的面外反应是造成破坏的主要原因之一。为了在地震后将这些体育馆用作避难所，需要对它们进行抗震改造。然而，传统的抗震加固方法需要用钢角板加固支座，并更换所有的屋面支撑，这是不经济的。本文讨论了在屋面支座中加入耗能元件的抗震加固方法，并对其对体育馆的减震效果进行了研究。在此基础上，提出了基于等效单自由度体系和等效线性化技术的减震支座优化设计简化计算方法。
A large numbers of steel roof bearings in RC gymnasia are damaged at 2011 Tohoku Earthquake, and out-of-plane response of cantilevered RC walls supporting the roof frame is identified as one of main causes of damage. In order to use these gymnasia as shelters after the earthquake, they are required seismic retrofit. However, a conventional seismic retrofit method requires strengthening bearings with steel corner plates and replacing all the roof braces, which is uneconomical. In this paper, a seismic retrofit method inserting energy-dissipation elements into roof bearings is discussed and their response reduction effects on the gymnasium are investigated. Furthermore, a simplified response evaluation method using equivalent SDOF system and equivalent linearization technique are proposed to determine the optimum design of the energy-dissipation bearings.