高层混合结构地震整体损伤指标研究

Studies on Global Seismic Damage Indices of High-rise Hybrid Structures

摘要:

首先基于模态参数，给出高层混合结构在四个损伤状态下的最终软化指标；然后用非线性分析软件CANNY对9个不同结构参数高层混合结构模型进行了近500次不同地震动作用下的非线性时程分析，建立了最大层间位移角与最终软化指标及结构参数之间的关系，以及最大层间位移角和最大总位移角之间的关系；并结合Pushover分析，提出了高层混合结构基于变形和能量的双参数损伤指标；最后通过一高层混合结构的模拟地震振动台试验对建议的各损伤指标量化值进行了验证。

Abstract:

Based on the modal parameters of the structures, four damage states and the range of final softening index of each state are suggested in this paper firstly. Then, 9 hybrid structures with different structural characteristics are analyzed by structural analysis program CANNY for about 500 times subjected to different ground motions. So, the relationship of the maximum interstory drift and the main structural characteristics, as well as the final softening index is obtained. At the same time, the relationship between the maximum interstory drift and the maximum roof displacement over the height is also acquired. Based on the pushover analysis, a damage index of high-rise hybrid structures accounting for maximum deformation and cumulative damage is put forward. Finally, a case study is conducted on a high-rise hybrid structure model tested on the shaking table before, and verifies the quantities of damage indices suggested in the paper.