Analysis of fundamental mode shape expressions of tall buildings for evaluating wind loads 高層建筑風(fēng)荷載計(jì)算中的基本振型表達(dá)式分析
Comparing with small tank , the sloshing in large tank includes not only fundamental mode but also higher modes and its fundamental period is much larger than that of small tank 從與小體積罐的比較可以看出,大型儲(chǔ)液罐的液面晃動(dòng)不只是以基本振型為主,前幾階振型對(duì)液面晃動(dòng)的貢獻(xiàn)也比較顯著,并且液面晃動(dòng)的基本周期比小體積罐的大很多。
This thesis will present a new simple method to calculate the seismic response of the framed structures . this method calculates the effect of the first and second modal vibration . the first modal shear force of every floor distributes according to the shape which is close to the first modal shape 本論文提出了一種新的計(jì)算框架結(jié)構(gòu)地震作用效應(yīng)的簡(jiǎn)化方法,考慮前兩個(gè)振型的作用,對(duì)于第一振型的各層剪力,按照近似于基本振型的形狀分布,第二振型各層剪力引用廖河山提出的方法計(jì)算,然后用將兩個(gè)振型的剪力“平方和開平方”的方法,計(jì)算得到各層剪力(總效應(yīng)) 。