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    李永靖，  林宇晗，  郭秋豐
    （遼寧工程技術(shù)大學(xué)土木與交通學(xué)院，阜新 123000）

[摘要] 以振型分解反應(yīng)譜法為理論基礎(chǔ)，改進(jìn)了考慮高階振型的Pushover算法水平側(cè)向力分布增量系數(shù)。通過算例，與以往的側(cè)向力均勻分布、倒三角分布進(jìn)行了推覆曲線、層間位移角和層間剪力分析對(duì)比，發(fā)現(xiàn)均勻分布偏差最大，倒三角分布較小，而改進(jìn)后的分布偏差最小，證明了改進(jìn)后的側(cè)向力分布能更好地進(jìn)行框架結(jié)構(gòu)抗震性能靜力分析，且具有較高的精度。
[關(guān)鍵詞] 水平側(cè)向力分布；Pushover算法；高階振型
中圖分類號(hào)：TU375.4  文獻(xiàn)標(biāo)識(shí)碼：A  文章編號(hào)：1002-848X(2011) Sl-0234-04

Analysis on seismic performance of frame construction based on improved Pushover algorithm
    Li Yongjing, Lin Yuhan, Guo Qiufeng
    (Institute of Civil and Traffic Engineering, Liaoning Technical University, Fuxin 123000, China)

Abstract: On the basis of the response spectrum method of computing seismic response, the increment capacitance of distribution of horizontal side force was improved considering Pushover algorithm of higher mode. By means of the example of calculation, comparison and analysis were made for curves, drift angle and shear force with former uruform distribution and downward-pointing triangle distribution of side force. The results show that the deviation of uruform distribution is the biggest then the downward-pointing triangle distribution. The smallest one is improved deviation. The improved distribution of side force can make the analysis for seismic performance of frame construction better and have high accuracy at the same time.
Keywords: distribution of horizontal side force; Pushover algorithm; higher mode