Improving Seismic Resilience Using Structural Systems with Friction-Based Fuses
Improving Seismic Resilience Using Structural Systems with Friction-Based Fuses
复制标题
使用带有摩擦保险丝的结构系统提高抗震能力
DOI：
10.1061/9780784480502.049
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
C. Horiuchi
中科院分区：
文献类型：
--
作者：
M. Sarkisian;N. Mathias;R. Garai;C. Horiuchi
目前的抗震设计规范没有考虑建筑物损坏对震后恢复过程的影响。基本的生命安全方法将建筑物视为一个离散的物体，但忽略了建筑物在完全受到同一灾难影响的社区内的环境。未来的结构抗震设计将通过保护大部分建筑结构并消除完全拆除和更换的需要来努力提高灾后使用性能。强调这些想法的结构系统的一个例子是 Pin-Fuse 抗震系统集合。这些系统使用滑动摩擦表面来模拟塑料铰链。通过限制孤立摩擦表面的“屈服”行为，地震后的结构修复可能就像更换特定连接处的螺栓和摩擦垫片一样简单。总结了 Pin Fuse 系统，解释了如何将基于摩擦的能量耗散概念应用于力矩框架连接、支撑框架和连接梁，并演示了如何通过使用滑动摩擦表面来增加阻尼和耗散能量，从而相对于传统系统改进整体结构行为。潜在的引脚熔断器连接示例将展示如何详细说明系统，以考虑超出典型框架系统限制的旋转时的可靠行为。此外，还提供了这些系统的当前研究的更新，包括正在进行的动态摩擦测试的结果。这些测试表明，使用复合摩擦表面可以实现可靠的滞后行为，并且可以自信地预测摩擦力。
Current seismic design codes do not consider the consequences of building damage on the post-earthquake recovery process. A basic life safety approach views the building as a discrete object but ignores the building’s context within a community wholly affected by the same disaster. The future of structural seismic design will strive for improved post-disaster occupancy performance by protecting a majority of the building structure and eliminating the need for full demolition and replacement. An example of a structural system which places an emphasis on these ideas is the Pin-Fuse collection of seismic force resisting systems. These systems use slipping friction surfaces to simulate plastic hinges. By limiting “yielding” behavior to isolated friction surfaces, structural repairs after an earthquake may be as simple as replacing bolts and friction shims at specific connections. A summary of the Pin Fuse systems is presented, explaining how the concept of friction-based energy dissipation can be applied to moment frame connections, braced frames and link beams, and demonstrating how global structural behavior can be improved versus conventional systems by using sliding friction surfaces to increase damping and dissipate energy. Examples of potential Pin Fuse connections will show how systems can be detailed to account for reliable behavior at rotations beyond the limits of typical framing systems. Furthermore, an update of the current research into these systems is provided, including results from ongoing dynamic friction tests. These tests demonstrate reliable hysteresis behavior can be achieved using composite friction surfaces and friction forces can be confidently predicted.