大直径钢管混凝土桥塔的温控防裂研究

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【中图分类号】：U445.57 【文献标志码】：A 【文章编号】：1008-3197（2025）05-16-03

【DOI编码】：10.3969/j.issn.1008-3197.2025.05.004

Research on Temperature Control and Crack Prevention of Large-diameter Concrete Filled Steel Tubular Bridge Tower

YANGDaigeng，ZHANGHong，LI Yongbo （Jiangsu CollegeofEngineeringand Technology，Nantong 226O7，China）

【Abstract】：Inorder to study theefective temperature controland crack prevention measures oflarge-diameterconcrete filled steel tubular（CFST）bridge tower，a finite element analysis model based on Ansys.The research evaluated the efect of common concrete pouring at low-temperature，special concrete pouring at normal-temperature and special concrete pouring at low-temperature，on temperature control and crack prevention.The results show thatthe special concrete pouring at low temperaturecan effectively reduce the overall temperature of the structure and reduce the temperature gradient，and effectively curb the risk of structural cracking.

【Key words】：large-diameterconcretefiledsteltubular（CFST）；bridgetower；temperaturecontrolandcrackprevention

大直径钢管混凝土桥塔（直径 ⩾2m ）在混凝土水化热集中释放阶段（浇筑后2～7d）易出现温度裂缝及界面脱空问题，进而导致结构承载力降低，严重影响结构的安全性与耐久性～2。（剩余2767字）