(1 浙江大学建筑工程学院, 杭州 310027; 2 浙江大学建筑设计研究院有限公司, 杭州 310058)

摘要: 温度应力是超长混凝土结构面临的主要问题,如何对结构温度效应进行准确模拟、并采取有效措施控制裂缝产生是处理该类问题的关键. 通过对超长混凝土结构进行有限元分析,提出结构温差计算方法和关键参数确定原则,基于数值分析结果和实际工程应用提出一种新型的裂缝控制措施. 分析表明,建立的有限元模型能够方便合理地反映结构温度效应;提出的楼面高差带能够有效降低超长钢筋混凝土结构楼板的温度应力、控制裂缝产生.

关键词: 超长混凝土结构; 温度应力; 有限元分析; 裂缝控制

中图分类号:TU375 文献标志码:A 文章编号: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;

∗浙江省博士后科研项目资助.

第一作者:朱浩川,博士,高级工程师,主要从事钢结构、组合结构和复杂结构的设计与研究工作,Email:zhuhaochuan86@qq. com.

[引用本文] 朱浩川,肖志斌,邵剑文,等. 超长混凝土结构温度效应有限元分析及裂缝控制措施[ J]. 建筑结构,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.