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(1 清華大學(xué)建筑設(shè)計研究院有限公司, 北京 100084; 2 清華大學(xué)土木工程系, 北京 100084)
摘要: 介紹了某三向六自由度 4 臺陣地震模擬振動臺基礎(chǔ)設(shè)計與施工,對比分析不同地基方案的優(yōu)劣. 主體結(jié)構(gòu)和振動臺基礎(chǔ)采用樁基礎(chǔ). 通過建立包括地基、上部主體結(jié)構(gòu)和振動臺基礎(chǔ)在內(nèi)的整體有限元模型,分析振動臺設(shè)備基礎(chǔ)的動力特性及振動響應(yīng). 結(jié)果表明,合理選擇基礎(chǔ)方案,加大基礎(chǔ)底板和槽道間尺寸,可有效減小基礎(chǔ)振動. 對振動臺振動時基礎(chǔ)各部位、實驗室主體結(jié)構(gòu)和周邊建筑的振動響應(yīng)進行了分析說明,并給出振動的影響范圍,為類似建筑選址設(shè)計提供參考. 在動力分析的基礎(chǔ)上進行了設(shè)備基礎(chǔ)設(shè)計,建立了包括鋼導(dǎo)軌在內(nèi)的設(shè)備基礎(chǔ)實體模型,對基礎(chǔ)和導(dǎo)軌進行了受力分析;為了減少基礎(chǔ)裂縫,提高基礎(chǔ)耐久性,結(jié)合基礎(chǔ)受力布置了預(yù)應(yīng)力筋. 最后,介紹了設(shè)備預(yù)埋導(dǎo)軌加工安裝和大體積混凝土基礎(chǔ)的施工措施.
關(guān)鍵詞: 地震模擬振動臺; 三維有限元模型; 基礎(chǔ)動力響應(yīng); 預(yù)埋導(dǎo)軌
中圖分類號:TU375 文獻標(biāo)志碼:A 文章編號:1002-848X(2023)11-0097-06
DOI:10. 19701 / j. jzjg. 20210473
Structural design and construction of a large seismic simulated shaking table
LI Zhengyu1, FANG Qingzhou1, CHEN Hong1, PAN Peng2, ZENG Yi2, CHEN Jingwei1, ZHANG Xuehui1
(1 Architectural Design and Research Institute of Tsinghua University, Beijing 100084, China; 2 Department ofCivil Engineering, Tsinghua University, Beijing 100084, China)
Abstract: The foundations structural design and construction for three-dimensional and six-degree-of-freedom 4-arrayseismic simulated shaking table were introduced. The advantages and disadvantages of different foundation schemes werecompared and analyzed. The main structure and shaking table foundations are pile foundations. By establishing an overallfinite element model including the subgrade, upper main structure, and shaking table foundation, the dynamiccharacteristics and vibration response of the shaking table equipment foundation were analyzed. The results show thatselecting a reasonable foundation scheme and increasing the size between the foundation bottom plate and the channel canreduce foundation vibration effectively. The vibration response of various parts of the foundation, the main structure of thelaboratory, and surrounding buildings was analyzed when the shaking table vibrates. And the impact range of the vibrationwas given, providing a reference for the site selection of similar buildings. The foundation design of the equipment wascarried out on the basis of dynamic analysis. By establishing equipment foundation model including steel guide rail, stressanalysis of foundation and guide rail was carried out. In order to reduce foundation cracks and improve foundationdurability, prestressed reinforcement was arranged in combination with foundation forces. Finally, the constructionmeasures for embedded guide rail installation and mass concrete foundation were introduced.
Keywords:seismic simulated shaking table; three dimensional finite model; foundation dynamic response; embedded rail
第一作者:李征宇,碩士,正高級工程師,一級注冊結(jié)構(gòu)工程師,主要從事復(fù)雜高層及大跨度結(jié)構(gòu)設(shè)計工作,Email:1035286586@ qq. com.
[引用本文] 李征宇,房輕舟,陳宏,等. 某大型地震模擬振動臺陣結(jié)構(gòu)設(shè)計與施工[ J]. 建筑結(jié)構(gòu),2023,53(11):97-102. LI Zhengyu,FANG Qingzhou,CHEN Hong,et al. Structural design and construction of a large seismic simulatedshaking table [J]. Building Structure,2023,53(11):97-102.
