补国斌, 马晓宇, 沈华, 刘方成, 李兆超, 周靖. 速度脉冲强震下偏心重力柱-核心筒体系的抗震性能研究[J]. 工程力学, 2023, 40(12): 89-98, 132. DOI: 10.6052/j.issn.1000-4750.2022.02.0153
引用本文: 补国斌, 马晓宇, 沈华, 刘方成, 李兆超, 周靖. 速度脉冲强震下偏心重力柱-核心筒体系的抗震性能研究[J]. 工程力学, 2023, 40(12): 89-98, 132. DOI: 10.6052/j.issn.1000-4750.2022.02.0153
BU Guo-bin, MA Xiao-yu, SHEN Hua, LIU Fang-cheng, LI Zhao-chao, ZHOU Jing. SEISMIC BEHAVIOR OF ECCENTRIC GRAVITY COLUMN-CORE WALL SYSTEM SUBJECTED TO PULSE-LIKE GROUND MOTIONS[J]. Engineering Mechanics, 2023, 40(12): 89-98, 132. DOI: 10.6052/j.issn.1000-4750.2022.02.0153
Citation: BU Guo-bin, MA Xiao-yu, SHEN Hua, LIU Fang-cheng, LI Zhao-chao, ZHOU Jing. SEISMIC BEHAVIOR OF ECCENTRIC GRAVITY COLUMN-CORE WALL SYSTEM SUBJECTED TO PULSE-LIKE GROUND MOTIONS[J]. Engineering Mechanics, 2023, 40(12): 89-98, 132. DOI: 10.6052/j.issn.1000-4750.2022.02.0153

速度脉冲强震下偏心重力柱-核心筒体系的抗震性能研究

SEISMIC BEHAVIOR OF ECCENTRIC GRAVITY COLUMN-CORE WALL SYSTEM SUBJECTED TO PULSE-LIKE GROUND MOTIONS

  • 摘要: 研究速度脉冲强震和结构偏心双重不利对新型重力柱-核心筒结构体系地震响应的影响。以地震模拟振动台试验为基础,采用CANNY软件校验参数设置合理性。设计不同高度质量偏心重力柱-核心筒结构,分别选取10条速度脉冲和10条非速度脉冲地震记录作为输入,采用CANNY软件对偏心体系进行动力时程分析,系统地研究了速度脉冲地震和偏心率对结构地震响应的影响规律。结果表明:脉冲地震工况下各偏心体系的弹性和弹塑性层间位移角、剪力、扭矩、扭转角均显著高于非脉冲地震工况对应值。弹塑性工况比弹性工况增大效应明显,变形增大效应比力增大效应更为显著。随着偏心率增大,弹性和弹塑性层间位移角、扭矩和扭转角均增大,层间剪力则呈现减小趋势。增量动力分析结果亦表明,偏心和速度脉冲地震效应均会显著增大层间位移角。建议在新型重力柱-核心筒结构的抗震设计中,应充分考虑速度脉冲地震和偏心对其地震响应的耦合影响。

     

    Abstract: The effects of the pulse-like ground motion and structural eccentricity on the seismic response of a new gravity column-core wall structural system are investigated. Based on the earthquake shaking table test, the rationality of parameter setting is verified using CANNY software. Gravity column-core wall structures with mass eccentricity and different height are designed, and 10 pulse-like and 10 corresponding non-pulse-like ground motion records are selected as the input. The dynamic time-history analysis is conducted to these eccentric systems upon employing CANNY. The effects of the velocity pulse and the eccentricity on the structural seismic response are systematically studied. The results show that: the elastic and elastic-plastic inter-story drift, shear force, and torsional and rotational angles of each eccentric system for pulse-like cases are significantly higher than those for non-pulse cases. The increasing effect of the elastic-plastic cases is more obvious than that of the elastic cases, and the increasing effect of the deformation is more significant than that of the force. With the increase of eccentricity, the elastic and elastic-plastic inter-story drift, and torsional and rotational angles increase, while the inter-story shear decreases. The results of incremental dynamic analysis also show that the eccentricity and velocity pulse effects will significantly increase the inter-story drift. It is suggested that the coupling effect of pulse-like ground motion and eccentricity on the seismic response should be fully considered in the seismic design of the new gravity column-core wall structure.

     

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