论文部分内容阅读
最近的地震记录表明,近断层地震与普通地震不一样,它具有非常大的能量或指向波。该波能导致相当严重的地震破坏,尤其对于自振周期接近地震周期的结构。近断层地震作用下现代工程结构的倒塌说明了目前钢筋混凝土结构抗震性能较差。这可能因为这些结构主要使用由持续时间较长,震源更远的地震形成的现有标准设计谱进行设计。因此,为了在近断层地震作用下性能保持良好,许多结构可能需要加强。由于安装简捷、生命周期成本低和零维护的优点,纤维增强复合材料是可行的选择。阐述了典型的钢筋混凝土结构近断层地震响应的研究结果和对纤维加强结构进行重要改进的可行方案。结果表明,通过纤维加强能成功实现结构刚度、强度、横向变形能力的提高。这表明,对于自振周期范围广的结构的优化,采用纤维加强方式是非常有效的。
Recent seismological records show that near-fault earthquakes, unlike ordinary earthquakes, have very large energies or directional waves. This wave can lead to quite serious earthquake damage, especially for structures with natural cycles close to the seismic cycle. The collapse of modern engineering structures under the action of near-fault earthquakes shows that the current seismic behavior of reinforced concrete structures is poor. This may be due to the fact that these structures are mainly designed using the existing standard design spectrum formed by long duration, quake-sourced earthquakes. Therefore, many structures may need to be strengthened in order to maintain good performance under near-fault earthquakes. Due to the ease of installation, low life cycle costs and zero maintenance, fiber reinforced composites are a viable option. The research results of the typical near-fault seismic response of reinforced concrete structures and the feasible solutions for the important improvement of fiber reinforced structures are described. The results show that the structural rigidity, strength and lateral deformation ability can be successfully improved by fiber reinforcement. This shows that for the optimization of structures with a wide range of natural periods, the use of fiber reinforcement is very effective.