Computational study of self‐centering buckling‐restrained braced frame seismic performance
Computational study of self‐centering buckling‐restrained braced frame seismic performance
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DOI：
10.1002/eqe.2428
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发表时间：
2014-10
影响因子：
4.5
通讯作者：
M. Eatherton;L. Fahnestock;David J. Miller
中科院分区：
文献类型：
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作者：
M. Eatherton;L. Fahnestock;David J. Miller
最近的研究开发和实验验证了一种自定心屈曲约束支撑（SC‐BRB），该支撑采用了一种恢复机制，该机制使用与预张紧形状记忆合金杆齐平的同心管，结合屈曲约束支撑（BRB）来耗散地震能量。本计算研究调查了如何在真实的建筑中实施SC‐BRB以提高抗震性能。首先，计算支撑模型的开发和校准对实验数据，包括一个新的循环材料模型的定义，超弹性NiTi形状记忆合金。然后进行了参数研究，以探索SC-BRB的设计空间。最后，一组原型建筑物的设计和计算进行了一套地面运动。还研究了重力式框架的侧向阻力对自定心的影响。
Recent research developed and experimentally validated a self‐centering buckling‐restrained brace (SC‐BRB) that employs a restoring mechanism created using concentric tubes held flush with pretensioned shape memory alloy rods, in conjunction with a buckling‐restrained brace (BRB) that dissipates seismic energy. The present computational study investigated how the SC‐BRB can be implemented in real buildings to improve seismic performance. First, a computational brace model was developed and calibrated against experimental data, including the definition of a new cyclic material model for superelastic NiTi shape memory alloy. A parametric study were then conducted to explore the design space for SC‐BRBs. Finally, a set of prototype buildings was designed and computationally subjected to a suite of ground motions. The effect of the lateral resistance of gravity framing on self‐centering was also examined.