基于静力推覆分析算法的高层建筑混凝土核心筒抗震性能模拟

doi:10.13229/j.cnki.jdxbgxb.20221082

摘要/Abstract

摘要：

为减少因震动导致的高层建筑混凝土核心筒损伤，提出了基于静力推覆分析算法的高层建筑混凝土核心筒抗震性能模拟方法。选择某应用屈曲约束支撑的高层建筑混凝土核心筒为研究对象，结合PKPM软件模拟了基于静力推覆分析算法的高层建筑混凝土核心筒抗震性能。实验结果表明：静力推覆侧力分布形式对高层建筑混凝土核心筒的顶点位移角和基底剪力计算结果影响较大；屈曲约束支撑的高层建筑混凝土核心筒在X向的基底剪力曲线呈指数型增长；强震动作用下高层建筑混凝土核心筒的刚度降低、柱剪力的占比不断增大；延性系数恒定时，高层建筑混凝土核心筒能量谱比值与刚度折减系数呈正相关关系；高层建筑混凝土核心筒的损伤情况随强震持时的提升而提升；随着刚度特征值的不断增大，剪力墙耗能在总滞回耗能比中的占比下降，而框架梁柱耗能的占比则有所上升且分布形式大致呈线性。

关键词: 静力推覆分析, 高层建筑, 混凝土核心筒, 抗震性能模拟, 顶点位移角, 基底剪力

Abstract:

In order to reduce the damage of concrete core tube of high-rise buildings caused by vibration， the seismic performance simulation method of concrete core tube of high-rise buildings based on static pushover analysis algorithm was studied. A high-rise building concrete core tube with buckling constraint bracing was selected as the research object， and the seismic performance of high-rise building concrete core tube based on static nappe analysis algorithm was simulated with software PKPM. The test results show that the distribution of the lateral force of the static nappe has great influence on the calculation results of the apex displacement angle and the base shear force of the concrete core tube in high-rise buildings. In the X-direction， the base shear curve of concrete core tube supported by buckling constraint increases exponentially. The stiffness of concrete core tube decreases and the proportion of column shear increases under strong vibration. When ductility coefficient is constant， the ratio of energy spectrum of high-rise concrete core tube is positively correlated with stiffness reduction coefficient. The damage of concrete core tube in high-rise building caused by longer strong earthquake duration increases with the increase of strong earthquake duration. With the increasing of the characteristic stiffness value， the proportion of the energy consumption of shear wall in the total hysteretic energy consumption ratio decreases， while the proportion of the energy consumption of frame beam and column increases and the distribution pattern is roughly linear.

Key words: static nappe analysis, high-rise buildings, concrete core tube, seismic performance simulation, vertex displacement angle, base shear

中图分类号:

TU971

雷鸣,尹思阳,王德玲,张继承,路世伟. 基于静力推覆分析算法的高层建筑混凝土核心筒抗震性能模拟[J]. 吉林大学学报(工学版), 2023, 53(9): 2573-2580.

Ming LEI,Si-yang YIN,De-ling WANG,Ji-cheng ZHANG,Shi-wei LU. Seismic performance simulation of high⁃rise concrete core tube based on static nappe analysis algorithm[J]. Journal of Jilin University(Engineering and Technology Edition), 2023, 53(9): 2573-2580.

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构件		尺寸/mm
外框柱	柱	2000×2000~1000×1000，含钢率为7.5%
外框柱	钢梁	H1000×500×30×40~H1000×200×25×58
核心筒	外墙	1500~500
	内墙	500~300
	连梁	1000
环带桁架	弦杆	H1000×500×50×50
环带桁架	腹杆	1000×500×50×50
楼面梁		H500×500×15×30
楼板		筒外150，筒内160，加强层及相邻层160

参数	侧力分布形式
参数	均布	倒三角	第一振型	三者平均
正常使用时基底剪力/kN	1381.6	1074.6	1206.8	1230.5
正常使用时顶点位移角/rad	1/1500	1/1300	1/1200	1/1300
暂时使用时基底剪力/kN	3118.5	2623.6	2461.8	2734.6
暂时使用时顶点位移角/rad	1/500	1/400	1/390	1/430
生命安全时基底剪力/kN	6717.8	5231.8	4712.5	5554.9
生命安全时顶点位移角/rad	1/140	1/130	1/170	1/150
接近倒塌时基底剪力/kN	5474.8	4953.7	4331.5	5326.7
接近倒塌时顶点位移角/rad	1/60	1/78	1/80	1/75

层数	柱剪力/kN	墙剪力/kN	柱剪力百分比/%
1	3 246.530	41 432.318	7.34
4	3 652.285	38 946.537	8.51
7	3 784.695	36 118.425	9.45
10	5 192.660	30 456.563	14.37
13	5 473.860	24 603.495	17.93
16	4 662.325	18 521.790	19.91
19	4 834.815	9 927.015	32.47
22	2 247.750	3 006.399	55.86

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