- 摘 要
-
(廣州大學(xué)土木工程學(xué)院, 廣州 510006)
摘要: 通過對十種不同振動控制方案的 1 ∶30 縮尺比振動臺試驗(yàn)?zāi)Ｐ瓦M(jìn)行豎向白噪聲掃頻,根據(jù)動力特性分析確定疊層橡膠支座合理的布置位置,并對具有合理的疊層橡膠支座布置位置的四支座模型和六支座模型以及傳統(tǒng)結(jié)構(gòu)設(shè)計模型共進(jìn)行了 84 組工況的豎向地鐵激勵振動臺試驗(yàn),研究振動控制層豎向剛度對上部結(jié)構(gòu)的豎向加速度響應(yīng)和豎向振動控制效果的影響. 結(jié)果表明:不同疊層橡膠支座布置位置對振動臺模型豎向動力特性具有顯著的影響,應(yīng)根據(jù)其與原型結(jié)構(gòu)動力特性的吻合度優(yōu)化調(diào)整振動臺模型支座布置方案;在滿足豎向承載力的前提下,適當(dāng)減小振動控制層豎向剛度,可降低豎向自振頻率,使其進(jìn)一步遠(yuǎn)離地鐵場地波的卓越頻帶,豎向峰值加速度和豎向均方根加速度均有顯著減小,豎向振動控制效果趨優(yōu).
關(guān)鍵詞: 地鐵上蓋結(jié)構(gòu); 超高層結(jié)構(gòu); 振動控制方案; 疊層橡膠支座; 豎向剛度; 豎向振動控制效果
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)05-0009-06
DOI:10. 19701 / j. jzjg. ZJ210010
Study on vertical shaking table model test of super high-rise structure over subway:the influence of different vibration control schemes
KE Xiaobo, WANG Dayang, ZHOU Yun, LIANG Qiuhe, LI Junrui, LING Haimei, DING Chao
( School of Civil Engineering, Guangzhou University, Guangzhou 510006, China)
Abstract: Through the vertical white noise frequency sweeping of the shaking table test models with 1 ∶30 scale ratio of tendifferent vibration control schemes, the reasonable placements of the laminated rubber bearings were determined accordingto the analysis of the dynamic characteristics. A total of 84 groups of vertical metro excitation shaking table tests werecarried out on the four bearing model and six bearing model with reasonable laminated rubber bearing placement andtraditional structural design model, the effect of vertical acceleration response and vertical vibration control effect of theupper structure caused by the vertical stiffness of the vibration control layer were studied. The results show that the differentplacement schemes of laminated rubber bearings have significant impacts on the vertical dynamic characteristics of theshaking table model, and the placement schemes of shaking table model bearings should be optimized according to itsconsistency with the dynamic characteristics of the prototype structure. Under the premise of satisfying the vertical capacity,appropriately reducing the vertical stiffness of the vibration control layer can reduce the vertical natural vibration frequencyand make it further away from the excellent frequency band of the subway site wave. The vertical peak acceleration and thevertical root mean square (RMS) acceleration are significantly reduced, and the vertical vibration control effect is better.
Keywords:structure over subway; super high-rise structure; vibration control schemes; laminated rubber bearing; verticalstiffness; vertical vibration control effect
∗廣州市科技計劃項目(202032866、202102010459) ,廣東省科技創(chuàng)新戰(zhàn)略專項資金( pdjh2020a0452) .
第一作者:柯小波,碩士研究生,主要從事結(jié)構(gòu)減振控制研究,Email: kinsist@ 163. com.
[引用本文] 柯小波,汪大洋,周云,等. 地鐵上蓋超高層結(jié)構(gòu)豎向振動臺模型試驗(yàn)———不同振動控制方案影響研究[ J] . 建筑結(jié)構(gòu),2022,52(5) :9-14,35. KE Xiaobo,WANG Dayang,ZHOU Yun,et al. Study on vertical shaking tablemodel test of super high-rise structure over subway: the influence of different vibration control schemes [ J] . BuildingStructure,2022,52(5) :9-14,35.
- 下載地址
-
