- 摘 要
-
(廣州大學(xué)土木工程學(xué)院, 廣州 510006)
摘要: 位于廣州市的某超高層結(jié)構(gòu)在地下 1 層采用疊層橡膠支座設(shè)置了振動(dòng)控制層,以降低上部結(jié)構(gòu)的豎向振動(dòng)響應(yīng). 對設(shè)置和不設(shè)置振動(dòng)控制層的結(jié)構(gòu),分別進(jìn)行了縮尺比為 1 ∶ 30 的模型振動(dòng)臺試驗(yàn). 輸入實(shí)測豎向地鐵場地波,測量和比較兩個(gè)振動(dòng)臺模型在各代表樓層的豎向加速度響應(yīng)情況. 結(jié)果表明,振動(dòng)控制層可以明顯降低模型豎向自振頻率,使其遠(yuǎn)離地鐵豎向振動(dòng)的卓越頻帶,且有效降低高階豎向振型的動(dòng)力響應(yīng). 振動(dòng)控制模型上部結(jié)構(gòu)的豎向加速度響應(yīng)低于非振動(dòng)控制模型,說明振動(dòng)控制層對豎向振動(dòng)具有衰減作用. 非振動(dòng)控制模型上部樓層加速度響應(yīng)隨樓層的增大逐漸增大,通過設(shè)置振動(dòng)控制層,使上部結(jié)構(gòu)沿豎向趨于整體運(yùn)動(dòng)狀態(tài),有效抑制上部樓層對豎向振動(dòng)的放大效應(yīng).
關(guān)鍵詞: 地鐵上蓋結(jié)構(gòu); 超高層結(jié)構(gòu); 疊層橡膠支座; 地鐵豎向激勵(lì); 振動(dòng)控制; 豎向動(dòng)力響應(yīng)
中圖分類號:TU352. 1,TU317+. 1,TU375 文獻(xiàn)標(biāo)志碼:A 文章編號:1002-848X(2022)05-0015-07
DOI:10. 19701 / j. jzjg. ZJ210016
Study on vertical shaking table model test of super high-rise structure over subway:the vibration transmission law
LI Junrui, WANG Dayang, ZHOU Yun, LIANG Qiuhe, KE Xiaobo, LING Haimei, DING Chao
( School of Civil Engineering, Guangzhou University, Guangzhou 510006, China)
Abstract: A superhigh-rise structure located in Guangzhou has a vibration control layer on the underground floor usinglaminated rubber bearings to reduce the vertical vibration response of the superstructure. For the structures with and withoutthe vibration control layer, model shaking table tests with a scale ratio of 1 ∶30 were carried out respectively. The measuredvertical subway site waves were input, and the vertical acceleration responses of the two shaking table models at eachrepresentative floor were measured and compared. The results show that the vibration control layer can significantly reducethe vertical natural vibration frequency of the model, thus avoiding the predominant frequency of train-induced verticalvibration, and reducing the dynamic response of high-order vertical mode shape. The vertical acceleration response of thesuperstructure of the vibration control model is lower than that of the non-vibration control model, indicating that thevibration control layer has a damping effect on vertical vibration. The acceleration response of the upper floor of thenon-vibration control model increases with the increase of the floor. By setting the vibration control layer, the superstructuretends to move in the vertical direction as a whole, and the amplification effect of the upper floor on the vertical vibration iseffectively suppressed.
Keywords:structure over subway; super high-rise structure; laminated rubber bearing; vertical excitation of subway;vibration control; vertical dynamic response
∗廣州市科技計(jì)劃項(xiàng)目(202032866、 202102010459) ,廣東省科技創(chuàng)新戰(zhàn)略專項(xiàng)資金( pdjh2020a0452) .
第一作者:李鈞睿,碩士研究生,主要從事結(jié)構(gòu)減振控制研究,Email: a2332a@ 126. com.
[引用本文] 李鈞睿,汪大洋,周云,等. 地鐵上蓋超高層結(jié)構(gòu)豎向振動(dòng)臺模型試驗(yàn)———振動(dòng)傳播規(guī)律研究[ J] .建筑結(jié)構(gòu),2022,52(5) :15-21,35. LI Junrui,WANG Dayang,ZHOU Yun,et al. Study on vertical shaking table modeltest of super high-rise structure over subway: the vibration transmission law[J]. Building Structure,2022,52(5):15-21,35.
- 下載地址
-
