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(廣州大學(xué)土木工程學(xué)院, 廣州 510006)
摘要: 以廣州某地鐵上蓋 120m 高超高層結(jié)構(gòu)為研究對象,針對該項目存在上蓋結(jié)構(gòu)影響地鐵隧道下沉問題和地鐵振動影響住戶舒適性的問題,對地鐵運行引起的地表和地下 15m 深度的豎向振動源進行了實測,分析了地鐵運行引起的該場地類別振源激勵的頻譜特征. 針對上蓋結(jié)構(gòu)地鐵運行激勵,提出了樁周減振降阻層、樁頂基礎(chǔ)底板下部設(shè)置減振褥墊層及其上部橡膠支座豎向振動控制層三級振動衰減技術(shù)方案. 設(shè)計制作了考慮有、無振動控制層的無樁基礎(chǔ)、0. 5m 樁基礎(chǔ)、1. 0m 樁基礎(chǔ) 6 組 1 ∶30 縮尺比彈性振動臺試驗?zāi)Ｐ?同步建立了相應(yīng)的縮尺結(jié)構(gòu)和原結(jié)構(gòu)的有限元計算模型. 基于振動臺試驗白噪聲測試、理論計算與數(shù)值分析結(jié)果,驗證了彈性振動臺試驗?zāi)Ｐ驮O(shè)計的有效性,為后續(xù)深入分析提供依據(jù).
關(guān)鍵詞: 地鐵上蓋建筑; 超高層結(jié)構(gòu); 振動臺試驗; 振動控制方案; 豎向振動控制效果
中圖分類號:TU375,TU317+. 1,TU352. 1 文獻標(biāo)志碼:A 文章編號:1002-848X(2022)05-0001-08
DOI:10. 19701 / j. jzjg. ZJ210014
Study on vertical shaking table model test of super high-rise structure over subway:engineering background and model verification
WANG Dayang, LIANG Qiuhe, ZHOU Yun, LI Junrui, KE Xiaobo, LING Haimei, DING Chao
( School of Civil Engineering, Guangzhou University, Guangzhou 510006, China)
Abstract: Taking a 120m height super high-rise structure over the subway in Guangzhou as the research object, aiming atthe problems that structure over the subway affects the subway tunnel subsidence and the subway vibration affects theresidents′ comfort. The vertical vibration sources of surface and underground at a depth of 15m caused by subway runningwere measured, and the spectral characteristics of the excitation of the vibration sources on this field class caused bysubway running were analyzed. A three-stage vibration attenuation technology scheme of vibration damping and resistancereduction layer around pile, vibration reduction cushion layer at the bottom of pile top foundation and vertical vibrationcontrol layer of upper rubber bearing was put forward according to the subway operation excitation of upper cover structure.Six groups of 1 ∶30 scale elastic shaking table test models of pileless foundation, 0. 5m pile foundation, and 1. 0m pilefoundation with or without vibration control layer were designed and made. The finite element calculation models of thecorresponding scaled structure and the original structure were established simultaneously. Based on the white noise testresults of the shaking table test, theoretical calculation and numerical analysis results, the validity of the design of theelastic shaking table test model was verified, providing basis for further analysis.
Keywords:building over subway; super high-rise structure; shaking table test; vibration control scheme; vertical vibrationcontrol 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:汪大洋,博士,教授,主要從事結(jié)構(gòu)振動控制研究,Email: wadaya2015@ gzhu. edu. cn.
[引用本文] 汪大洋,梁秋河,周云,等. 地鐵上蓋超高層結(jié)構(gòu)豎向振動臺模型試驗———工程背景與模型驗證研究[ J] . 建筑結(jié)構(gòu),2022,52(5) :1-8,28. WANG Dayang,LIANG Qiuhe,ZHOU Yun,et al. Study on vertical shaking tablemodel test of super high-rise structure over subway: engineering background and model verification[ J] . Building Structure,2022,52(5) :1-8,28.
