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羅赤宇， 焦 柯， 吳桂廣， 趙云龍
(廣東省建筑設計研究院，廣州510010)[摘要] 選用3條短周期波和2條長周期波對佛山保利商務中心超高層結(jié)構(gòu)進行時程分析。依據(jù)抗震設計規(guī)范判斷這5條地震波均不符合要求，基于規(guī)范反應譜對5條波進行了修正。大震加速度時程計算表明，短周期波應進行修正，否則地震響應偏小，而長周期波不宜根據(jù)規(guī)范要求進行地震波修正，長周期波比短周期波對結(jié)構(gòu)的破壞程度大，造成結(jié)構(gòu)損傷嚴重，比如連梁和剪力墻底部加強區(qū)的損傷遠大于短周期波，連梁若過早破壞，將導致結(jié)構(gòu)扭轉(zhuǎn)加大，進一步加重剪力墻的破壞。建議對超高層結(jié)構(gòu)，采用3條以上符合場地特征的天然波計算，取其結(jié)果的包絡值進行抗震性能設計。
[關鍵詞] 長周期地震波；超高層結(jié)構(gòu)；彈塑性時程分析
中圖分類號：TU973 +.2 文獻標識碼：A 文章編號：1002-848X( 2012) S2-0038-06Elastic-plastic time history analysis contrast under the long-period waves and short-period waves of asuper high-rise building structure
Luo Chiyu, Jiao Ke, Wu Guiguang, Zhao Yunlong
( The Arclutectural Design and Research Institute of Guangdong Province, Guangzhou 510010, China)Abstract: Two long-period seisnuc waves and three short-period seismic waves are chosen to analyze the super high-rise structure of Poly Business Center in Foshan. The five waves that do not meet the code of seismic design of buildings are fixed according to the code response spectrum. The time history results show that short-period waves should be modified, or the earthquake response will be smaller, but long-period waves should not be modified; the latter is much larger than the former on the degree of damage, such as coupling beams and shear wall strengthened area. Coupling beams premature failure will lead to the structure torsion increase, fruther aggravating the destruction of the shear wall. The author suggest on super high-rise building structure, calculating three or above natural waves conforming to the site classification and taking the results of envelope value to seisnuc design.
Keywords: long-period seismic waves; super high-rise structure; elastic-plastic time lustory analysis
