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    盧紅霞，李  剛
    (嘉興學(xué)院建筑工程學(xué)院，嘉興314001)

[摘要] 較長(zhǎng)周期的（T₁>1.4T_g）多高層規(guī)則建筑結(jié)構(gòu)，在三類場(chǎng)地土（T_g=0.55s）條件下，采用底部剪力法計(jì)算水平地震作用沿房屋高度方向的分布時(shí)，  《建筑抗震設(shè)計(jì)規(guī)范》( GB50011-2008)與《高層建筑混凝土結(jié)構(gòu)技術(shù)規(guī)程》(JGJ3-2002)中的頂部附加地震作用系數(shù)在取值上存在較大差異。采用振型分解法，對(duì)該種情況下的結(jié)構(gòu)進(jìn)行了分析，得出頂部附加地震作用系數(shù)的變化規(guī)律。研究成果對(duì)于該類結(jié)構(gòu)抗震設(shè)計(jì)具有一定的參考價(jià)值。
[關(guān)鍵詞] 水平地震作用；底部剪力法；項(xiàng)部附加地震作用系數(shù)；高階振型

Research of top additional earthquake action coefficient in multi-storey reinforced concrete frame structure
Lu Hongxia, Li Gang
(Civil Engineering Institute ofjiaxing University,  Jiaxing 314001,  China)

Abstract: For the longer periodic mulit-storey building, its period is always greater than l.4 times of the site soil characteristic period. The distribution of horizontal earthquake action in high rise building was analyzed. When the equivalent base shear method was applied to solve the seisnuc action on this type ofbuilding under the conditions of the site soil classification is III type, there is a significant difference in the value of the top additional earthquake action coefficient between Code for Seismic Design of Buildings  (GB50011-2008)  and Technical Specification for Concrete Structures of Building  (JGJ3-2002).The mode analysis method was adopted to analyze the longer periodic mulit-storey building and the regularity of top additional earthquake action coefficient was found out. The analysis result has
particularly reference value for the seisnuc design for this type ofbuilding.
Keywords: horizontal earthquake action; equivalent base shear method; top additional earthquake action coefficient; high-order vibration mode