| 长周期地震动下高层钢管混凝土框架侧移性倒塌性能 |
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| 引用本文： | 白涌滔.长周期地震动下高层钢管混凝土框架侧移性倒塌性能[J].建筑钢结构进展,2021,23(3):74-84. |
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| 作者姓名： | 白涌滔 |
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| 作者单位： | 重庆大学土木工程学院,重庆 400045 |
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| 基金项目： | 中国地震局地震工程与工程振动重点实验室重点专项(2020EEEVL0413);城市与工程安全减灾教育部重点实验室开放课题(2021B04);中央高校基本科研业务费基础前沿与学科交叉培育项目(2020CDJQY-A063);重庆市留创计划创新类项目(cx2020022)。 |
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| 摘 要： | 开发了新的高精度钢与钢管混凝土(concrete-filled steel tube,CFST)的损伤与性能退化模型,研究了钢管混凝土柱在超高轴压下的抗震性能及其退化规律,基于该退化本构模型开发了纤维有限元仿真程序.基于长周期地震波峰值速度,分析了高层钢管混凝土框架在长周期地震作用下的倒塌行为.通过建立了高层CFST框...
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| 关 键 词： | 钢管混凝土 性能退化 长周期地震波 高层框架 侧移性倒塌 |
Earthquake-Induced Sidesway Collapse Resistance of High-Rise Concrete-Filled Steel Frames Subjected to Long-Period Ground Motions |
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| BAI Yongtao.Earthquake-Induced Sidesway Collapse Resistance of High-Rise Concrete-Filled Steel Frames Subjected to Long-Period Ground Motions[J].Progress in Steel Building Structures,2021,23(3):74-84. |
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| Authors: | BAI Yongtao |
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| Affiliation: | (School of Civil Engineering,Chongqing University,Chongqing 400045,China) |
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| Abstract: | This paper presents a novel damage and performance degradation model for high-rise steel and concrete-filled steel structures.The effects of concrete confinement and damages,and the post-local buckling deterioration are accounted in this model,which is calibrated by analyzing the seismic behavior of square CFST beam-columns under high-axial forces.Incremental dynamics analyses on typical high-rise CFST frame structures subjected to long-period ground motions are performed by using this numerical model with the strength degradation(SD)effect and P-Δ effect.It is found that a side-sway collapse mechanism is formed due to the development of drift concentration at bottom stories with a finite height controlled by coupled SD and P-Δeffect. |
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| Keywords: | concrete-filled steel tube strength deterioration long-period ground motion high-rise frame side-sway collapse |
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