高层建筑场地边坡抗地震倒塌能力评估模型分析
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摘要
针对传统的抗地震倒塌能力评估模型存在着地震倒塌能力评估时间较长、评估系数与实际抗倒塌能力系数偏差较大等问题,本文提出一种基于等效单自由度的高层建筑场地边坡抗地震倒塌能力评估模型。考虑P-Δ效应对高层建筑场地边坡抗地震倒塌能力的影响,构建了P-Δ效应的等效单自由度模型,根据该模型获取边坡结构侧移与结构顶点位移,用于构建运动微分方程,对其模型中的参数进行计算;对计算结果进行转换,构建等效单自由度体系,计算边坡结构不同周期延性需求,获取边坡结构延性需求谱,计算延性需求谱对应等效周期,在等效周期内对建筑边坡结构抗地震倒塌能力进行评估。实验结果证明,所提模型可以快速、精确地对建筑边坡结构抗地震倒塌能力进行评估。
Aiming at the traditional anti-seismic collapse ability evaluation model, there are some problems such as long evaluation time of earthquake collapse ability, large deviation between evaluation coefficient and actual anti-collapse capability coefficient, and a seismic high-rise building site slope based on equivalent single degree of freedom is proposed.Collapse ability assessment model. Considering the influence of P-Δ effect on the seismic collapse resistance of high-rise building site slope, the equivalent single-degree-of-freedom model of P-Δ effect is constructed. According to the model, the lateral displacement of the slope structure and the displacement of the structure vertex are obtained, which is used to construct the motion. Differential equations are used to calculate the relevant parameters of the equivalent single-degree-of-freedom model. The equivalent single-degree-of-freedom system is constructed by transforming, calculating the different periodic ductility requirements of the slope structure, obtaining the ductility demand spectrum of the slope structure, and calculating the correspondence of the ductility demand spectrum. The effectiveness cycle evaluates the seismic collapse resistance of the building slope structure during the equivalent period. The experimental results show that the proposed model can quickly and accurately evaluate the seismic collapse resistance of building slope structures.
Aiming at the traditional anti-seismic collapse ability evaluation model, there are some problems such as long evaluation time of earthquake collapse ability, large deviation between evaluation coefficient and actual anti-collapse capability coefficient, and a seismic high-rise building site slope based on equivalent single degree of freedom is proposed.Collapse ability assessment model. Considering the influence of P-Δ effect on the seismic collapse resistance of high-rise building site slope, the equivalent single-degree-of-freedom model of P-Δ effect is constructed. According to the model, the lateral displacement of the slope structure and the displacement of the structure vertex are obtained, which is used to construct the motion. Differential equations are used to calculate the relevant parameters of the equivalent single-degree-of-freedom model. The equivalent single-degree-of-freedom system is constructed by transforming, calculating the different periodic ductility requirements of the slope structure, obtaining the ductility demand spectrum of the slope structure, and calculating the correspondence of the ductility demand spectrum. The effectiveness cycle evaluates the seismic collapse resistance of the building slope structure during the equivalent period. The experimental results show that the proposed model can quickly and accurately evaluate the seismic collapse resistance of building slope structures.
引文
[1]丁声荣,霍艳华.混凝土结构建筑物抗震加固强度测试仿真[J].计算机仿真,2017,34(8):429-432
[2]袁世聪,蒋欢军.不同类型连梁框架-核心筒结构抗震性能研究[J].振动与冲击,2017,36(12):169-174
[3]赵人达,许智强,邹建波,等.基于ANSYS的大跨斜拉桥地震响应分析及性能评估[J].建筑科学与工程学报,2018,35(4):19-26
[4]梁丹,梁兴文.RC框架结构抗地震倒塌性能评估的简化方法[J].工程力学,2017,34(2):102-110
[5]韩建平,张丽丽,徐阳.近断层脉冲型地震动作用下RC框架结构抗整体性倒塌能力分析[J].结构工程师,2017,33(1):32-42
[2]袁世聪,蒋欢军.不同类型连梁框架-核心筒结构抗震性能研究[J].振动与冲击,2017,36(12):169-174
[3]赵人达,许智强,邹建波,等.基于ANSYS的大跨斜拉桥地震响应分析及性能评估[J].建筑科学与工程学报,2018,35(4):19-26
[4]梁丹,梁兴文.RC框架结构抗地震倒塌性能评估的简化方法[J].工程力学,2017,34(2):102-110
[5]韩建平,张丽丽,徐阳.近断层脉冲型地震动作用下RC框架结构抗整体性倒塌能力分析[J].结构工程师,2017,33(1):32-42