(1 兰州理工大学甘肃省土木工程防灾减灾重点实验室, 兰州 730050; 2 兰州理工大学防震减灾研究所, 兰州 730050)

［摘要］由于长周期地震动记录相对缺乏，国内外对长周期地震动作用下高层结构的地震响应研究尚不充分。选取2008年汶川地震和2011年日本东北地震中长周期分量明显的3组地震动记录，首先对其绝对加速度放大系数谱和相对位移反应谱的特性进行研究；进一步以某超限高层结构为研究对象，同时以这3组地震动记录为输入，分别进行了8度多遇地震作用下的弹性分析和罕遇地震作用下的弹塑性时程分析，提取了结构的主要地震响应指标，并与相应水准El Centro地震动记录输入下的分析结果进行了比较。对比结果表明，长周期地震动输入下结构的地震响应指标如水平最大位移和最大层间位移角明显大于普通地震动记录输入下的响应指标，因此长周期地震动对超限高层结构的影响应引起足够的重视。

［关键词］长周期地震动; 超限高层; 时程分析; 地震响应; 汶川地震; 日本东北大地震

中图分类号：TU352.1      文献标识码：A      文章编号：1002-848X(2014)18-0059-04

Seismic response analysis of an out-of-code high-rise building under long-period ground motion: case studies of Wenchuan Earthquake and Japan Tohoku Earthquake records

Han Jianping1,2, Su Yanbing1,2

 (1 Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou 730050, China; 2 Institute of Earthquake Protection and Disaster Mitigation, Lanzhou University of Technology, Lanzhou 730050, China)

Abstract: Due to the lack of long-period ground motion records, the influence of long-period ground motion on seismic performance of high-rise buildings is not studied sufficiently. Three suites of ground motion records with obvious long-period components from 2008 Wenchuan Earthquake and 2011 Japan Tohoku Earthquake were selected. The characteristics of their absolute acceleration amplification factor spectra and relative displacement spectrum were discussed. Furthermore, an out-of-code high-rise building was taken as case study. These suites of ground motion records were taken as inputs to carry out elastic time-history analysis under the frequent earthquake and elastic-plastic time-history analysis under the rare earthquake of the seismic fortification intensity zone 8. Main seismic response indicators were obtained and also compared with the results under the corresponding El Centro ground motion input cases. Comparison of the results shows that seismic responses such as maximum horizontal displacement and maximum story drift under long-period ground motion are apparently higher than the seismic responses under normal ground motion, which indicates that enough attention should be paid on the influence of long-period ground motion on the seismic performance of out-of-code high-rise buildings.

Keywords: long-period ground motion; out-of-code high-rise building; time-history analysis; seismic response; Wenchuan Earthquake; Japan Tohoku Earthquake

*国家自然科学基金项目(51268036)。

作者简介：韩建平，博士，教授，博士生导师，Email：jphan@lut.cn。

参考文献

［1］KOKETSU K, MIYAKE H. A seismological overview of long-period ground motion ［J］. Journal of Seismology, 2008, 12(2): 133-143.

［2］谢礼立, 周雍年, 胡成详, 等. 地震动反应谱的长周期特性［J］. 地震工程与工程振动, 1990, 10(1): 1-20.

［3］陈清军, 袁伟泽, 曹丽雅. 长周期地震波作用下高层结构的弹塑性动力响应分析［J］. 力学季刊, 2011, 32(3): 404-410.

［4］KOKETSU K, HATAYAMA K, FURUMURA T, et al. Damaging long-period ground motions from the 2003 Mw 8.3 Tokachi-oki, Japan, earthquake ［J］. Seismological Research Letters, 2005, 76(1): 67-73.

［5］杨伟林, 朱升初, 洪海春, 等. 汶川地震远场地震动特征及其对长周期结构影响的分析［J］. 防灾减灾工程学报, 2009, 29(4): 473-478.

［6］TAKEWAKI I, MURAKAMI S, FUJITA K, et al. The 2011 off the Pacific coast of Tohoku earthquake and response of high-rise buildings under long-period ground motions ［J］. Soil Dynamics and Earthquake Engineering, 2011, 31(11): 1511-1528.

［7］CHEN K C, WANG J H, HUANG B S, et al. Vibrations of the TAIPEI 101 skyscraper caused by the 2011 Tohoku earthquake, Japan ［J］. Earth Planets Space, 2012, 64(12): 1277-1286.

［8］BOORE D M. Long-period ground motions from digital acceleration recordings: a new era in engineering seismology［C］//G-LKAN P, ANDERSON J G. Directions in Strong Motion Instrumentation. Dordrecht: Springer, 2005: 41-54.

［9］CHUNG Y L, NAGAE T, HITAKA T, et al. Seismic resistance capacity of high-rise buildings subjected to long-period ground motions: E-defense shaking table test ［J］. Journal of Structural Engineering, ASCE, 2010, 136(6): 637-644.

［10］FACCIOLI E, CAUZZI C, PAOLUCCI R, et al. Long period strong ground motion and its use as input to displacement based design［C］//PITILAKIS K D. Earthquake Geotechnical Engineering. Dordrecht: Springer, 2007: 23-51.

［11］PAOLUCCI R. Long-period earthquake ground motion: recent advances and observations from the April 6 2009, Mw6.3 L’Aquila Earthquake, Italy［C］//FARDIS M N. Advances in Performance-based Earthquake Engineering. Dordrecht: Springer, 2010: 59-68.

［12］李恒, 李龙安, 冯谦. 用位移反应谱研究长周期设计地震反应谱［J］. 地震工程与工程振动, 2012, 32(4): 47-53.

［13］杨学林, 周平, 徐燕青. 兰州红楼时代广场超限高层性能化抗震设计［J］. 建筑结构, 2012, 42(8): 50-55.

［14］田春雨, 张宏, 曹进哲, 等. 兰州红楼时代广场项目模拟地震振动台模型试验报告［R］. 北京: 中国建筑科学研究院建研科技股份有限公司, 2012.