Seismic vulnerability analyses of multi-tower super high-rise buildings under near fault ground motions
JIANG Li1,LIU Zhen2,MA Xingliang1
1.School of Civil Engineering and Architecture,Changzhou Institute of Technology,Changzhou 213032,China;
2.School of Management Science and Engineering,Shandong Technology and Business University,Yantai 264005,China
Abstract：Near fault ground motion is a special type of ground motion that contains high energy velocity pulses, with long periods, strong destructiveness, and concentrated energy. Compared to single tower super high-rise buildings, multi tower super high-rise buildings have more complex forces, longer natural vibration periods, easier input of velocity pulse energy into the structure, and may cause significant differences in response to each tower. However, no corresponding provisions have been issued in the seismic code for such special cases. Taking a three tower super high-rise building as an example, taking various near fault and non near fault ground motions and high energy velocity pulses as ground motion inputs, seismic time history analysis is conducted using large-scale finite element software, and seismic vulnerability analysis is conducted for the main tower and auxiliary tower structures with inter story displacement angle and maximum displacement as the main analysis objects. The results show that the example structure can meet the requirements of "no damage due to small earthquakes, no repair due to moderate earthquakes, and no collapse due to large earthquakes" under various earthquake actions; However, the response of near fault ground motions to structures is much greater than that of non near fault ground motions; Comparing the damage probabilities of various damage states, near-fault ground motions have an average increase of 11.79% compared to non near-fault ground motions. Further analysis of high energy velocity pulses reveals that velocity pulses are an important factor causing structural damage in near-fault ground motions, and smaller velocity pulses may cause more severe structural damage to the main tower.
[1] 张同亿,张松,王宁,等.海口双子塔-南塔结构设计关键技术研究[J].建筑结构学报,2022,43(01):192-201.
ZHANG Tongyi, ZHANG Song, WANG Ning, et al. Research on Key Technologies for Structural Design of Haikou Twin Towers South Tower [J]. Journal of Architectural Structure, 2022,43 (01): 192-201
[2] 王世振,白国良.近断层滑冲型地震动作用下框架-剪力墙高层结构的IDA研究[J].防灾减灾工程学报,2019,39(03):437-444.
WANG Shizhen, BAI Guoliang. IDA study on frame shear wall high-rise structures under near fault slip and thrust ground motions [J]. Journal of Disaster Prevention and Reduction Engineering, 2019, 39 (03): 437-444.
[3] 潘钦锋,颜桂云,吴应雄,等.近断层脉冲型地震动作用下高层建筑组合隔震的减震性能研究[J].振动工程学报,2019,32(05):845-855.
PAN Qinfeng, YAN Guiyun, WU Yingxiong, et al. Research on the damping performance of composite isolation of high-rise buildings under the action of near fault pulse type ground motions [J]. Journal of Vibration Engineering, 2019, 32 (05): 845-855.
[4] 张亚飞,刘德稳,房思彤,等.超高层错层隔震体系地震响应研究[J].建筑结构学报,2021,42(S1):10-17.
ZHANG Yafei, LIU Dewen, FANG Sitong, et al. Research on seismic response of super high-rise staggered floor isolation system [J]. Journal of Building Structure, 2021,42 (S1): 10-17
[5] 潘毅,时胜杰,常志旺,等.近断层脉冲地震动对基础隔震结构放大效应的量化分析[J].土木工程学报,2018,51(11):8-16.
PAN Yi, SHI Shengjie, CHANG Zhiwang, et al. Quantitative analysis of amplification effect of near fault pulse ground motions on base isolated structures [J]. Journal of Civil Engineering, 2018, 51 (11): 8-16
[6] 吴小宾,彭志桢,秦攀,等.组合隔震技术在高烈度区复杂高层结构中的应用研究[J].建筑结构学报,2022,43(08):56-64.
WU Xiaobin, PENG Zhizhen, QIN Pan, et al. Research on the application of combined isolation technology in complex high-rise structures in high intensity areas [J]. Journal of Building Structure, 2022,43 (08): 56-64
[7] 李青,邹双凤,李敏,等.近、远场地震动作用下超高层结构抗震性能研究[J].华南地震,2019,39(04):92-97.
LI Qing, ZOU Shuangfeng, LI Min, et al. Research on seismic performance of super high-rise buildings under near-field and far-field seismic actions [J]. South China Earthquake, 2019, 39 (04): 92-97.
[8] 杨参天,解琳琳,李爱群,等.适用于高层隔震结构的地震动强度指标研究[J].工程力学,2018,35(08):21-29.
YANG Cantian, XIE Linlin, LI Aiqun, et al. Study on seismic strength index for high rise isolated structures [J]. Engineering Mechanics, 2018, 35 (08): 21-29.
[9] 冯俊,赵伯明,赵天次.基于非因果滤波和零点法的近断层脉冲型地震动识别方法[J].振动与冲击,2022,41(19):71-79.
Feng Jun, Zhao Boming, Zhao Tianci. Near fault impulse ground motion identification method based on non causal filtering and zero point method [J]. Vibration and Shock, 2022,41 (19): 71-79
[10] Chen Xiaoyu, Wang Dongsheng. Multi-pulse characteristics of near-fault ground motions[J]. Soil Dynamics and Earthquake Engineering, 2020, 137: 106275.
[11] Todorov Borislav, Billah Ahm Muntasir. Seismic fragility and damage assessment of reinforced concrete bridge pier under long-duration, near-fault, and far-field ground motions[J]. Structures. 2021,31: 671-685.
[12] Zengin Esra, Abrahamson Norman A. A vector‐valued intensity measure for near‐fault ground motions[J]. Earthquake Engineering & Structural Dynamics , 2020, 49(7): 716-734.
[13] Liu Zhen, Li Xiaolong, Zhang Zhe. Quantitative identification of near-fault ground motions based on ensemble empirical mode decomposition[J]. KSCE Journal of Civil Engineering, 2020, 24: 922-930.
[14] Bhagat Satish, Wijeyewickrema, Anil C. et al. Influence of near-fault ground motions with fling-step and forward-directivity characteristics on seismic response of base-isolated buildings. Journal of Earthquake Engineering , 2021, 25(3): 455-474.
[15] Shahi, S.K. and Baker, J.W.. An efficient algorithm to identify strong velocity pulses in multi-component ground motions. Bulletin of the Seismological Society of America, 2014, 104(5), 2456–2466.
[16] 王世振,白国良.近断层滑冲型地震动作用下框架-剪力墙高层结构的IDA研究[J].防灾减灾工程学报,2019, 39(03):437-444.
WANG Shizhen, BAI Guoliang. IDA study of frame shear wall high-rise structures subjected to near fault slip and thrust ground motions [J]. Journal of Disaster Prevention and Mitigation Engineering, 2019, 39 (03): 437-444
