地震研究

以位于Ⅷ度区(0.3 g)的某多塔钢筋混凝土(Reinforced Concrete,RC)框架建筑为研究对象,对其进行了大底盘隔震设计,研究了在设防、罕遇地震作用下3个塔楼的动力响应,并基于韧性评价标准对该隔震方案展开了2个地震水准下的抗震韧性评价。结果表明:隔震后结构基本周期延长至原来的3倍,降低了地震作用,有效控制了上部结构的地震响应。楼面绝对加速度的显著控制基本消除了加速度敏感型非结构构件的损伤。结构构件以及位移敏感型非结构构件的修复费用主导了建筑的修复费用。建筑的修复时间由阶段Ⅰ中结构构件的修复时间控制,此隔震方案下建筑的抗震韧性等级达到了三星。

A reinforced concrete(RC)frame structure with multi-towers located in the Ⅷ-degree(PGA=0.3 g)region was integrated into a common isolation system.The seismic response of the three towers in case of being hit by the design basis earthquake(DBE)and the maximum considered earthquake(MCE)was studied,and the assessment of the towers' seismic resilience was carried out based on the Standard for Seismic Resilience Assessment of Buildings(GB/T 38591—2020).The results indicate that the isolation technology helps to extend the basic period of the structure by three times,reduce the seismic action,and effectively control the seismic response of the superstructure.Significant control of the absolute floor acceleration eliminates the damage of acceleration-sensitive non-structural components(ASNSCs).The repair cost of the structural components as well as the displacement-sensitive non-structural components(DSNSCs)takes up a major part of the total cost,and the repair time of the structural components in Phase 1 decides the total repair time of the structure.The seismic resilience of the structure applied with the seismic isolation scheme proposed in this paper can be successfully improved to Level 3,the outcomes can provide reference for design of isolated structure on large chassis.

引言
1 案例设计
2 结构响应分析
3 建筑抗震韧性分析
4 结论

图1 本文选取RC框架结构平面(a)及三维(b)图<br/>Fig.1 Planar(a)and three-dimensional(b)views of a RC structure

图1 本文选取RC框架结构平面(a)及三维(b)图
Fig.1 Planar(a)and three-dimensional(b)views of a RC structure

表1 RC框架结构构件尺寸信息<br/>Tab.1 Information of the components of RC frame structure

表1 RC框架结构构件尺寸信息
Tab.1 Information of the components of RC frame structure

表2 RC框架结构非结构构件信息<br/>Tab.2 Information of the non-structural componentsof RC frame struture

表2 RC框架结构非结构构件信息
Tab.2 Information of the non-structural componentsof RC frame struture

表3 结构前三阶基本动力特性对比<br/>Tab.3 Comparison of the first three-order dynamiccharacteristics of the structure

表3 结构前三阶基本动力特性对比
Tab.3 Comparison of the first three-order dynamiccharacteristics of the structure

图2 隔震支座布置图<br/>Fig.2 Layout of the isolators

图2 隔震支座布置图
Fig.2 Layout of the isolators

表4 隔震支座参数<br/>Tab.4 Parameters of the isolators

表4 隔震支座参数
Tab.4 Parameters of the isolators

图3 8组天然波和3组人工波地震动主方向(a)和次方向(b)反应谱与规范谱对比<br/>Fig.3 Comparison between the seismic responsespectrums and the designing spectrums of 8 naturalwave records and 3 artificial wave records in the main(a)and the secondary direction(b)

图3 8组天然波和3组人工波地震动主方向(a)和次方向(b)反应谱与规范谱对比
Fig.3 Comparison between the seismic responsespectrums and the designing spectrums of 8 naturalwave records and 3 artificial wave records in the main(a)and the secondary direction(b)

表5 隔震设计关键指标<br/>Tab.5 Critical parameters in isolation design

表5 隔震设计关键指标
Tab.5 Critical parameters in isolation design

表6 Perform-3D软件建立模型的周期和振型<br/>Tab.6 Periods and vibration modes of the Perform-3D model

表6 Perform-3D软件建立模型的周期和振型
Tab.6 Periods and vibration modes of the Perform-3D model

图4 2种地震作用下3个塔楼的结构地震响应分布<br/>Fig.4 Distributions of the inter-storey drift angle and the floor acceleration of 3 towersin case of being hit by different earthquakes

图4 2种地震作用下3个塔楼的结构地震响应分布
Fig.4 Distributions of the inter-storey drift angle and the floor acceleration of 3 towersin case of being hit by different earthquakes

表7 建筑韧性评价原则<br/>Tab.7 The evaluation principle for the resilientperformance of the structure

表7 建筑韧性评价原则
Tab.7 The evaluation principle for the resilientperformance of the structure

图5 在设防(a)及罕遇(b)地震作用下3个塔楼的损伤构件的修复费用<br/>Fig.5 Restoration cost for the 3 towers in case of being hit by the design basis earthquake(a)and the maximum considered earthquake(b)

图5 在设防(a)及罕遇(b)地震作用下3个塔楼的损伤构件的修复费用
Fig.5 Restoration cost for the 3 towers in case of being hit by the design basis earthquake(a)and the maximum considered earthquake(b)

图6 在设防(a)及罕遇(b)地震作用下3个塔楼的损伤构件的修复费用占比<br/>Fig.6 Composition of restoration cost for the elements of the 3 towers in case of being hit by the design basis earthquake(a)and the maximum considered earthquake(b)

图6 在设防(a)及罕遇(b)地震作用下3个塔楼的损伤构件的修复费用占比
Fig.6 Composition of restoration cost for the elements of the 3 towers in case of being hit by the design basis earthquake(a)and the maximum considered earthquake(b)

图7 在设防(a)和罕遇(b)地震作用下3个塔楼损伤构件的修复时间<br/>Fig.7 Recovery time for the 3 towers in case of beinghit by the design basis earthquake(a)and themaximum considered earthquake(b)

图7 在设防(a)和罕遇(b)地震作用下3个塔楼损伤构件的修复时间
Fig.7 Recovery time for the 3 towers in case of beinghit by the design basis earthquake(a)and themaximum considered earthquake(b)

表8 在设防和罕遇地震作用下3个塔楼的人员伤亡率<br/>Tab.8 Casualty rate of the 3 towers in case of beinghit by the design basis earthquake and themaximum considered earthquake

表8 在设防和罕遇地震作用下3个塔楼的人员伤亡率
Tab.8 Casualty rate of the 3 towers in case of beinghit by the design basis earthquake and themaximum considered earthquake

邓烜,叶烈伟,郁银泉,等.2015.大底盘多塔隔震结构设计[J].建筑结构,45(8):13-18,24.
Deng X,Ye L W,Yu Y Q,et al.2015.Seismic isolation design of multi-tower structure with enlarged base[J].Building Structure,45(8):13-18,24.(in Chinese)
范重,崔俊伟,薛浩淳,等.2021.地铁上盖结构隔震效果研究[J].工程力学,38(S1):77-88.
Fan Z,Cui J W,Xue H C,et al.2021.Study on the isolation effect of subway cover structures[J].Engineering Mechanics,38(S1):77-88.(in Chinese)
李爱群.2012.日本东北大地震之隔减震建筑考察与思考[J].工程力学,29(S2):69-77,106.
Li A Q.2012.Investigation and consideration of seismic isolation and energy dissipation structures in Tohoku earthquake[J].Engineering Mechanics,29(S2):69-77,106.(in Chinese)
吴曼林,谭平,唐述桥,等.2010.大底盘多塔楼结构的隔震减震策略研究[J].广州大学学报(自然科学版),9(2):83-89.
Wu M L,Tan P,Tang S Q,et al.2010.Seismic isolation strategies for multi-tower structure with a large podium[J].Journal of Guangzhou University(Natural Science Edition),9(2):83-89.(in Chinese)
解琳琳,范子麦,王心宇,等.2023.RC框架-剪力墙隔震结构地震韧性设计研究[J].工程力学,40(10):47-57.
Xie L L,Fan Z M,Wang X Y,et al.2022.Investigation on the resilience-based seismic design of isolated RC frame shear wall structures[J].Engineering Mechanics,40(10):47-57.(in Chinese)
尹传印,解琳琳,李爱群,等.2019.基于抗规和隔规的RC框架隔震结构设计对比[J].工程力学,36(9):197-204.
Yin C Y,Xie L L,Li A Q,et al.2019.Comparison on the seismic design of base-isolation RC frames using two Chinese codes[J].Engineering Mechanics,36(9):197-204.(in Chinese)
张亮泉,客金保.2022.长周期地震动参数与隔震结构响应参数的相关性研究[J].地震研究,45(1):17-25.
Zhang L Q,Ke J B.2022.Research on the correlation between ground motion intensity indexes and maximum response of the isolation system[J].Journal of Seismological Research,45(1):17-25.(in Chinese)
中华人民共和国国务院.2021.建设工程抗震管理条例[N].中华人民共和国国务院公报,(23):13-19.
State Council of the PRC.2021.Regulations of administration of seismic management of construction projects[N].Communique of the State Council of the People's Republic of China,(23):13-19.(in Chinese)
朱宏平,周方圆,袁涌.2014.建筑隔震结构研究进展与分析[J].工程力学,31(3):1-10.
Zhu H P,Zhou F Y,Yuan Y.2014.Development and analysis of the research on base isolated structures[J].Engineering Mechanics,31(3):1-10.(in Chinese)
GB 50011—2010,建筑抗震设计规范[S].
GB 50011—2010,Code for seismic design of buildings[S].(in Chinese)
GB/T 38591—2020,建筑抗震韧性评价标准[S].
GB/T 38591—2020,Standard for seismic resilience assessment of buildings[S].(in Chinese)
GB/T 51408—2021,建筑隔震设计标准[S].
GB/T 51408—2021,Standard for seismic isolation design of building[S].(in Chinese)
Becker T C,Bao Y,Mahin S A.2017.Extreme behavior in a triple friction pendulum isolated frame[J].Earthquake Engineering and Structural Dynamics,46(15):2683-2698.
Cancellara D,Angelis F D.2017.Assessment and dynamic non-linear analysis of different base isolation systems for a multi-storey RC building irregular in plan[J].Computers Structures,180:74-88.
Guo T,Xu W,Song L,et al.2014.Seismic-isolation retrofits of school buildings:Practice in China after recent devastating earthquakes[J].Journal of Performance of Constructed Facilities,28(1):96-107.
Mokhtari M,Naderpour H.2020.Seismic resilience evaluation of base-isolated RC buildings using a loss-recovery approach[J].Bulletin of Earthquake Engineering,18(10):5031-5061.
Moretti S,Trozzo A,Terzic V,et al.2014.Utilizing base-isolation systems to increase earthquake resiliency of healthcare and school buildings[J].Procedia Economics and Finance,18:969-976.
Shen S J,Liu W Q,Du D S,et al.2013.Effects of nonlinear seismic response of isolated structures on spectrum characteristics of ground motions[J].Nanjing Univ Technol,35(3):1-5.
Wang X Y,Xie L L,Zeng D M,et al.2021.Seismic retrofitting of reinforced concrete frame-shear wall buildings using seismic isolation for resilient performance[J].Structures,34:4745-4757.
Xie L L,Wang X Y,Zeng D M,et al.2022.Resilience-based retrofitting of adjacent reinforced concrete frame-shear wall buildings integrated into a common isolation system[J].Journal of Performance of Constructed Facilities,36(1):04021100.
Yang C T,Xie L L,Li A Q,et al.2020.Resilience-based retrofitting of existing urban RC-frame buildings using seismic isolation[J].Earthquake Engineering and Engineering Vibration,19(4):839-853.
Yin C Y,Xie L L,Li A Q,et al.2021.Comparison of the seismic-resilient design of seismically isolated reinforced concrete frame stractures using two codes[J].The structural design of Tall and Special Buildings,30(14):e1886.

备注

引言

1 案例设计

2 结构响应分析

3 建筑抗震韧性分析

4 结论

期刊信息