摘要
密肋复合墙结构独特的构造使结构在地震作用下表现出填块→框格→外框的破坏模式,实现对地震能量的分级释放,形成结构抗震的三道防线。为探讨密肋复合墙体中各道抗震防线对抗震性能的影响,进行2组复合墙体的试验研究。观察墙体主要破坏形态和破坏过程,分析墙体承载力、滞回特征、延性、刚度、耗能能力等抗震性能。研究表明:肋格约束下的填充砌块极限承载力明显提高,屈服位移减小,延性降低。加外框的墙体比不加外框的墙板承载力明显提高。屈服荷载之前主要为砌块开裂耗能,屈服荷载后主要为裂缝的开裂闭合及相互摩擦耗能,标准墙板中的砌块及墙板内裂缝分别受到肋格和外框的约束,摩擦耗能较为充分。在密肋结构中,可通过调整每道防线的设计参数改变三道抗震防线的发生顺序及耗能性能,实现三道抗震防线量化设计。
A unique multi-fibbed composite wall structure earthquake, it realizes the release of seismic energy with different to explore its a seismic performance, two groups of the composite shows the failure mode of block-grid-outer frame under levels, it forms triple seismic fortification lines. In order walls were studied. The main destruction mode and the main failure process of the wall were observed, the a seismic performances including bearing capacity, hysteresis characteristics, ductility, stiffness, and energy dissipation were analyzed Studies showed that under constraint of filled rib grid block , the bearing capacity of the well significantly improves, its yield displacement reduces, its ductility decreases ; compared with non-framed wall panels, the framed wall capacity improves significantly; before yielding the main energy is dissipated for block cracking, after yielding, the main energy is dissipated for crack closure and friction between the crack ; the blocks and cracks of the standard wall are constrained respectively by the rib grid, the energy consumption for friction can be more adequately; in a ribbed structure, by adjusting design parameters of each line of defense, the sequence of triple seismic fortification lines and seismic energy consumption performance can be changed, and the quantitative aseismic design of triple seismic fortification lines is achieved.
出处
《振动与冲击》
EI
CSCD
北大核心
2013年第3期119-123,共5页
Journal of Vibration and Shock
基金
北京交通大学基本科研业务费(2011JBM082)
国家自然科学基金(50878021)资助项目
关键词
密肋复合墙
抗震性能
三道防线
试验研究
multi-grid composite wall
aseismic performance
triple seismic fortification lines
experimental study
