Feasibility study of utilizing superelastic shape memory alloy plates in steel beam–column connections for improved seismic performance
Feasibility study of utilizing superelastic shape memory alloy plates in steel beam–column connections for improved seismic performance
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DOI：
10.1177/1045389x14529032
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发表时间：
2015-03
影响因子：
2.7
通讯作者：
S. Moradi;M. Alam
中科院分区：
文献类型：
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作者：
S. Moradi;M. Alam
钢抗弯框架在地震活跃区很容易遭受大面积损坏。使用形状记忆合金等智能材料可以减轻强震后结构构件的大永久变形。在本文中，通过三维有限元分析来研究采用形状记忆合金板的梁柱连接的抗震性能。对梁塑性铰中带有形状记忆合金板的八个梁柱连接组件进行了循环载荷下的分析。基于数值结果，发现超弹性形状记忆合金板的回心特性可有效减少翼缘板梁柱连接的残余位移，同时表现出优异的延展性。此外，形状记忆合金板可以防止结构构件发生局部屈曲和损坏。新的自定心连接还可以表现出良好的能量耗散能力。
Steel moment-resisting frames are prone to extensive damage in seismically active zones. Large permanent deformations in structural members following strong earthquakes can be mitigated using smart materials such as shape memory alloys. In this article, three-dimensional finite element analyses are conducted to study the seismic performance of beam–column connections incorporating shape memory alloy plates. Eight beam–column connection subassemblies with shape memory alloy plates in the plastic hinge of beam were analyzed under cyclic loading. Based on the numerical results, the recentering properties of superelastic shape memory alloy plates were found to be effective in reducing the residual drifts of a flange plate beam–column connection, while displaying an excellent ductility. In addition, shape memory alloy plates could prevent the occurrence of local buckling and damage in structural members. The new self-centering connections could also exhibit a good energy dissipation capability.