...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Engineering Structures >Seismic retrofit of external concrete beam-column joints reinforced by plain bars using steel angles prestressed by cross ties
【24h】

Seismic retrofit of external concrete beam-column joints reinforced by plain bars using steel angles prestressed by cross ties

机译：交叉筋预应力钢角钢加固钢筋混凝土外部梁柱节点的抗震改造

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A method for seismic retrofit of beam-column joints, designed without seismic considerations and reinforced by plain bars, is examined. The method, already applied to connections reinforced by deformed bars, has been modified for joints with plain bars. Retrofit of these relatively old connections needs special attention due to the weak steel concrete bond, let alone the lack of seismic consideration in design. In this method, steel angles are placed on the faces of beam-column intersections and are externally fixed by prestressed cross-ties. Five half-scale specimens were tested under cyclic load: two control specimens under two levels of axial load, and three retrofitted specimens with varying dimensions of angles, different number and prestressing rate of cross ties, with and without stiffener plates in the angles. The tests show significant improvement of the retrofitted specimens in terms of protecting the joint region against large deformation, showing more ductile response and higher hysteresis energy capacity, as well as moderate strength improvement. The tests show that the specimen with the minimum level of retrofit, which had the smallest angle, minimum number of cross ties, and lowest rate of prestressing, with no stiffeners, has performed well. Accordingly, the corresponding retrofit measures may be recommended for similar cases. (C) 2017 Elsevier Ltd. All rights reserved.
机译：研究了一种在无地震考虑的情况下设计并由普通钢筋加固的梁柱节点的抗震改造方法。该方法已经应用于变形钢筋加固的连接，现在已修改为用于普通钢筋连接的方法。这些较旧的连接的改造由于钢混凝土结合力较弱而需要特别注意，更不用说在设计中缺乏抗震性了。在这种方法中，将钢角放置在梁柱相交处的表面上，并通过预应力横梁在外部固定。在循环载荷下测试了五个半比例试样：两个在两个轴向载荷水平下的对照试样，以及三个在不同角度尺寸，不同数量和不同预应力的横梁上加装和不加筋板的改型试样。这些测试表明，在保护接头区域免受大变形影响方面，翻新标本有了显着改善，表现出了更大的延性响应和更高的滞后能量，以及中等强度的提高。测试表明，在不加劲肋的情况下，具有最小程度的改型，具有最小的角度，最小的横梁数量和最低的预应力率的试样性能良好。因此，在类似情况下，可能会建议采取相应的改造措施。 （C）2017 Elsevier Ltd.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号