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(中國建筑西北設(shè)計(jì)研究院有限公司, 西安 710018)

摘要: 針對(duì)既有西安火車站加固改造工程,通過多種方案的比選確定了采用傳統(tǒng)加固方法。 確定了合理的加固設(shè)計(jì)后續(xù)使用年限及相關(guān)參數(shù),選擇 01 版抗震規(guī)范對(duì)其進(jìn)行加固改造設(shè)計(jì)。 結(jié)合不同的加固方法,對(duì)加固改造模型進(jìn)行了驗(yàn)算與迭代分析,最終確定并優(yōu)化了一整套加固方案。 對(duì)外圍框架柱采取異形柱加固的方案,實(shí)現(xiàn)了修舊如舊的效果,保留了原有的歷史風(fēng)貌。 本次改造新增整層的鋼結(jié)構(gòu)夾層,新增鋼梁與原混凝土框架柱鉸接,樓板采用鋼筋桁架樓承板,通過總體指標(biāo)比對(duì)和構(gòu)件內(nèi)力分析,確定了合理的新增夾層并入原結(jié)構(gòu)的設(shè)計(jì)模型。 對(duì)于夾層新增鋼梁與原混凝土框架的連接節(jié)點(diǎn)構(gòu)造形式,進(jìn)行了創(chuàng)新并做了充分的驗(yàn)算。 同時(shí),對(duì)地基與基礎(chǔ)進(jìn)行了復(fù)核驗(yàn)算,并對(duì)其中一排柱下地基采用注漿加固法,有效地避免了新建建筑附加荷載和施工的不利影響。 最后,針對(duì)構(gòu)造措施的不同要求,提出具體的構(gòu)造措施加固方法。

關(guān)鍵詞: 西安火車站; 加固改造; 異形柱加固; 夾層; 構(gòu)造措施

中圖分類號(hào):TU375. 4 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002-848X(2022)11-0125-09

DOI:10. 19701 / j. jzjg. XBY2229

Reinforcement and reconstruction design of Xi’ an Railway Station and analyses of related problems

SHI Shengzhi, XIN Li, YANG Qi, HAN Gangqi, HUANG Chao, CHENG Qianqian

(China Northwest Building Design and Research Institute Co. , Ltd. , Xi’ an 710018, China)

Abstract: For the reinforcement and reconstruction project of the existing Xi ’ an Railway Station, the traditional reinforcement method was determined through the comparison of various schemes. The reasonable following service life and related parameters of reinforcement design were determined, and the 01 version of the seismic code was selected for reinforcement and reconstruction design. Combined with different reinforcement methods, the reinforcement model was checked and analyzed iteratively, and a whole set of reinforcement schemes were finally determined and optimized. The special-shaped column reinforcement scheme was adopted for the outer frame columns, which achieved the effect of repairing the old as the old and retained the original historical features. In this renovation, a whole layer of steel structure interlayer was added. The new steel beams were hinged with the original concrete frame columns, and the floor was made of reinforced truss floor plate. Through the comparison of the overall index and the analysis of the internal force of the components, the reasonable design model of adding the new interlayer into the original structure was determined. The connection joint between the new steel beam and the original structural column was innovated and sufficiently checked. At the same time, the foundation and basement were checked, and the grouting reinforcement method was adopted for one row of column foundation, which effectively avoided the adverse effects of additional load and construction of new buildings. Finally, according to the different requirements of structural measures, specific structural measures and reinforcement methods were proposed.

Keywords: Xi ’an Railway Station; reinforcement and reconstruction; special-shaped columns reinforce; interlayer;structural measure