- 摘 要
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(1蘭州理工大學土木工程學院， 蘭州 730050； 2 蘭州理工大學西部土木工程防災減災教育工程研究中心， 蘭州 730050； 3 甘肅建投天水建設(shè)管理有限公司， 天水 741020)
［摘要］天水體育中心游泳館屋蓋為鋼網(wǎng)殼結(jié)構(gòu)，采用分塊吊裝和局部頂升相結(jié)合的施工工序，整體網(wǎng)殼結(jié)構(gòu)拼裝完成之后進行整體卸載。為了研究在施工過程中鋼網(wǎng)殼結(jié)構(gòu)的力學性能變化情況以及保證結(jié)構(gòu)在施工過程中的安全，利用MIDAS Gen對結(jié)構(gòu)吊裝及頂升過程進行數(shù)值模擬分析，并將計算結(jié)果作為后期卸載模擬的初始值，采用強制位移法對網(wǎng)殼整體結(jié)構(gòu)的卸載過程進行模擬。根據(jù)模擬結(jié)果并結(jié)合施工方法制定合理的施工監(jiān)測方案，在現(xiàn)場布設(shè)傳感器對結(jié)構(gòu)施工過程進行應力應變實時監(jiān)測，最后將數(shù)值模擬結(jié)果與現(xiàn)場監(jiān)測數(shù)據(jù)進行對比分析。結(jié)果表明：模擬分析結(jié)果與現(xiàn)場實測數(shù)據(jù)分析結(jié)果總體變化趨勢基本吻合，在卸載過程中吊裝部分與頂升部分伴隨千斤頂?shù)幕赜?，網(wǎng)殼結(jié)構(gòu)的應力狀態(tài)逐步從施工狀態(tài)轉(zhuǎn)變?yōu)樵O(shè)計使用狀態(tài)，力學性能變化在合理的設(shè)計范圍內(nèi)。
［關(guān)鍵詞］天水體育中心； 游泳館; 鋼網(wǎng)殼結(jié)構(gòu)； 施工數(shù)值模擬； 強制位移法； 健康監(jiān)測
中圖分類號：TU393-3文獻標識碼：A文章編號：1002-848X(2020)17-0034-06
Construction simulation analysis and monitoring of steel reticulated shell structure of natatorium for Tianshui Sports Center
ZHANG Jun1, WANG Xiuli1,2, BI Guiquan1,2, ZHAO Haiyan3
(1 School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China； 2 Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, Lanzhou 730050, China； 3 Gansu Building Investment Tianshui Construction Management Co., Ltd., Tianshui 741020, China)
Abstract:The roof of Tianshui Natatorium is a steel reticulated shell structure, the construction process of block hoisting and local jacking was adopted, after the whole reticulated shell structure was assembled, the overall unloading was carried out. In order to study the change of mechanical properties of steel reticwlated shell structure during construction and ensure the safety of the structure in the construction process, MIDAS Gen was used to simulate the hoisting and jacking process of the structure, and the calculation results were taken as the initial value of later unloading simulation, and the forced displacement method was used to simulate the unloading process of the whole structure of the reticulated shell. According to the simulation results and combined with the construction method, a reasonable construction monitoring scheme was formulated. Sensors were deployed on site to monitor the stress and strain of the structure in real time during the construction process. Finally, the numerical simulation results were compared with the field monitoring data. The results show that: overall change trends of the simulation analysis results and the field measured data analysis results are basically consistent, in the unloading process, the hoisting part and the jacking part are accompanied by the oil return of the jack, the stress state of the reticulated shell structure gradually changes from the construction state to the design use state, and the mechanical properties change within the reasonable design range.
Keywords:Tianshui Sports Center; natatorium; steel reticulated shell structure; construction numerical simulation; forced displacement method; health monitoring
*國家自然科學基金(51778273)，甘肅省住房和城鄉(xiāng)建設(shè)廳科研項目（JK2018-17）。
作者簡介：張君，碩士研究生，Email:1515329175@qq.com;通信作者：王秀麗，博士，教授，博士生導師，Email：wangxl9104@163.com。
