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(1 浙江大學(xué)建筑工程學(xué)院, 杭州 310027; 2 浙江大學(xué)建筑設(shè)計(jì)研究院有限公司, 杭州 310058)

摘要: 溫度應(yīng)力是超長(zhǎng)混凝土結(jié)構(gòu)面臨的主要問(wèn)題,如何對(duì)結(jié)構(gòu)溫度效應(yīng)進(jìn)行準(zhǔn)確模擬、并采取有效措施控制裂縫產(chǎn)生是處理該類問(wèn)題的關(guān)鍵. 通過(guò)對(duì)超長(zhǎng)混凝土結(jié)構(gòu)進(jìn)行有限元分析,提出結(jié)構(gòu)溫差計(jì)算方法和關(guān)鍵參數(shù)確定原則,基于數(shù)值分析結(jié)果和實(shí)際工程應(yīng)用提出一種新型的裂縫控制措施. 分析表明,建立的有限元模型能夠方便合理地反映結(jié)構(gòu)溫度效應(yīng);提出的樓面高差帶能夠有效降低超長(zhǎng)鋼筋混凝土結(jié)構(gòu)樓板的溫度應(yīng)力、控制裂縫產(chǎn)生.

關(guān)鍵詞: 超長(zhǎng)混凝土結(jié)構(gòu); 溫度應(yīng)力; 有限元分析; 裂縫控制

中圖分類號(hào):TU375 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002-848X(2023)09-0123-05

DOI:10. 19701 / j. jzjg. LS202114

Finite element analysis of temperature effect and crack-control measures for ultra-long concrete structures

ZHU Haochuan1,2, XIAO Zhibin2, SHAO Jianwen2, TONG Genshu1

(1 College of Architecture Engineering, Zhejiang University, Hangzhou 310027, China;2 The Architectural Design & Research Institute of Zhejiang University Co. , Ltd. , Hangzhou 310058, China)

Abstract:Temperature stress is the main problem faced by ultra-long concrete structure, how to accurately simulate thestructural temperature effect and take effective measures to control the crack generation is the key to deal with this kind ofproblem. Based on the finite element analysis and practical engineering application of ultra-long concrete structures, thecalculation method of structural temperature difference and the determination principle of key parameters were proposed,and a new method of crack-control was also introduced. The analysis shows that the finite element modeling can revealtemperature variation effect effectively and reasonably. The proposing floor elevation zone can weaken the impact oftemperature stress, and avoid ultra-long concrete structure cracking.

Keywords:ultra-long concrete structure; temperature stress; finite element analysis;

∗浙江省博士后科研項(xiàng)目資助.

第一作者:朱浩川,博士,高級(jí)工程師,主要從事鋼結(jié)構(gòu)、組合結(jié)構(gòu)和復(fù)雜結(jié)構(gòu)的設(shè)計(jì)與研究工作,Email:zhuhaochuan86@qq. com.

[引用本文] 朱浩川,肖志斌,邵劍文,等. 超長(zhǎng)混凝土結(jié)構(gòu)溫度效應(yīng)有限元分析及裂縫控制措施[ J]. 建筑結(jié)構(gòu),2023,53( 9):123-127,52. ZHU Haochuan,XIAO Zhibin,SHAO Jianwen,et al. Finite element analysis of temperatureeffect and crack-control measures for ultra-long concrete structures[J]. Building Structure,2023,53(9):123-127,52.