原文传递
Rocking Timber Structure with Slip-Friction Connectors Conceptualized As a Plastically Deformable Hinge within a Multistory Shear Wall
| 题名： | Rocking Timber Structure with Slip-Friction Connectors Conceptualized As a Plastically Deformable Hinge within a Multistory Shear Wall |
| 正文语种： | 英文 |
| 作者： | Wei Y. Loo;Pierre Quenneville;Nawawi Chouw |
| 作者单位： | Univ, of Auckland |
| 关键词： | Timber shear walls; Rocking structures; Damage avoidance; Self-centering; Wood structures. |
| 摘要： | Recent experiments on a 2.44 x 2.44 m rigid timber wall panel with slip-friction connectors have demonstrated the feasibility of enabling elastoplastic behavior in structures that would otherwise be essentially rigid. The slip-friction connectors are adopted as the holddowns that anchor the ends of the wall to the foundation. These replace the traditionally used steel bracket hold-downs, which relied on inelastic damage to the screw or nail connections for energy dissipation. Overturning resistance of the wall directly relates to the slip-force in the slip-friction connectors. On the slip-force being reached, the intention is that the wall rocks in a controlled manner. A numerical study demonstrates the energy dissipation advantages of this approach. A direct-displacement-based design procedure is proposed for a multistory wall with slip-friction connectors. The wall is numerically modeled, and its response to earthquake time-history loadings compared with that of an idealized structure with a single plastic deformable hinge at the base. Results show that when gravity is not considered, the wall structure with slip-friction connectors behaves almost identically to that of its idealized equivalent. Taking into consideration higher mode effects of multi-degree-of-freedom (MDOF) rocking structures, base shears, and response accelerations are capped to the level expected, but residual displacements are significant. However, with self-weight considered, residual displacements of the wall are trivially small, and maximum displacements are also, in general, reduced. For the wall configurations investigated, the results suggest that a rocking timber wall unit at the base of a multistory shear wall will not only provide the load limiting benefits of a plastically deformable hinge, but also minimize maximum drifts, and allow for the structure to restore to its original position. DOI: 10.106l/(ASCE)ST.1943-541X.0001387. © 2015 American Society of Civil Engineers. |
| 出版日期： | 2016.04 |
| 出版年： | 2016 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.142 |
| 期： | NO.04 |
| 页码： | E4015010 |
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