- 摘 要
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李東升，賈 輝，李宏男，任 亮，王國新
(大連理工大學(xué)水利工程學(xué)院，大連116024)[摘要] 從結(jié)構(gòu)波動力學(xué)的角度分析了地震波在結(jié)構(gòu)中傳播的時間延遲性特點(diǎn)，并利用此時延特點(diǎn)修正了傳統(tǒng)結(jié)構(gòu)動力學(xué)方程中隱含的時間一致性假設(shè)。進(jìn)而給出了簡單、實(shí)用的計算高層結(jié)構(gòu)考慮地震動輸入時間延遲的方法。通過對某高層按《建筑抗震設(shè)計規(guī)范》(GB50011-2001)和《高層建筑混凝土結(jié)構(gòu)設(shè)計規(guī)程》(JGJ3-2002)中規(guī)定的層問位移和頂點(diǎn)最大位移的計算表明，原有的計算方法數(shù)值偏小而不安全。
[關(guān)鍵詞] 高層建筑結(jié)構(gòu)；結(jié)構(gòu)動力學(xué)；結(jié)構(gòu)波動力學(xué)；時問延遲；層間位移Disscussion on the time delay of earthquake excitation in high-rise building
Li Dongsheng, Jia Hui, Li Hongnan, Ren Liang, Wang Guoxin
(School of Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China)Abstract: The nature of time delay of earthquake wave propagation was analyzed from the perspective of wave propagation, and then the time delay was used to modify the convention structural dynamics equation with the assumption of implicit simultaneity. Furthermore,a simple and practical method was derived to compute structural responses considering the delay of wave propagation in the structure. Through the computation of floor displacement and top floor maximum displacement according to current standards on seismic design of buildings, it was shown that the conventional method neglecting the effects of the time delay of wave propagation in structures would give comparatively smaller and unsafe values.
Keywords: high-rise building; structural dynamics; wave propagation in structures; time delay; floor displacement;
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