震后可恢复功能木结构研究进展

A state-of-the-art review on earthquake resilient timber structures

震后可恢复功能概念引入木结构已成为近年来国际木结构抗震工程研究的热点。可恢复功能木结构体系主要包括自复位木框架结构和摇摆木剪力墙结构,研究表明,带有耗能机制的自复位及摇摆木结构具有很好的抗震性能,结构在震后无损伤或损伤很小,无需修复或稍加修复即可快速恢复使用。阐述了自复位木框架结构和摇摆木剪力墙结构的工作原理,对国内外的研究进展进行总结,综述了木结构中的预应力损失、结构损伤控制的研究成果以及可恢复功能木结构的设计方法。介绍了两个可恢复功能木结构工程案例和可恢复功能木结构的研究趋势,提出了对于耗能件设计、减少预应力损失、结构设计方法以及结构性能评估方法的热点研究方向。

In recent years, earthquake resilient timber structures, which mainly consist of self-centering timber frames and/or post-tensioned rocking timber walls, have become a worldwide research focus in timber engineering. Previous research has shown that when integrated with energy dissipaters, self-centering or rocking timber structures have excellent seismic performance with little or even no damage after an earthquake. Moreover, self-centering or rocking timber structures have the ability of restoring to original positions, which minimizes residual deformations and repair efforts. The state-of-the-art research on load resisting mechanism of self-centering timber frames and rocking timber shear walls are summarized. Meanwhile, the research progress on pre-stress loss in post-tensioned timber systems, structural damage control, and design methods for earthquake resilient timber structures are presented. At last, two case studies of earthquake resilient timber structures in practical engineering are introduced, and the future trends of the research on energy dissipater design, pre-stress loss control , structural design method, and structural performance assessment are summarized.