河南科技HenanScienceandTechnology交通与土木工程总第802期第8期2023年4月混凝土桥台水化热仿真分析与裂缝处理张智（云南省玉溪市新平县地方公路管理段，云南玉溪653499）摘要：【目的目的】针对混凝土桥台台身在施工期间产生竖向裂缝的问题，对该桥台温度场与应力场进行数值模拟。【方法方法】通过MidasFEANX软件，对台身混凝土内外部温度、应力进行了水化热仿真分析。【结果结果】分析结果表明：台身混凝土内外部温差较大，台身混凝土外部拉应力超出了实测抗拉强度（72~336h）；将温度场、应力场分析结果与该桥台台身实际裂缝情况进行对比分析，找出了桥台台身开裂原因；将实测裂缝情况与仿真模拟结果对比分析，发现MidasFEANX软件可有效分析混凝土水化热温度、应力变化情况。【结论结论】结合该桥台台身裂缝情况与仿真分析结果，对该桥台台身的裂缝提出了相应的处置建议，并在裂缝处理完成约半年之后对裂缝进行了复查，发现其表面稳定，未有扩展现象。关键词：混凝土桥台；大体积混凝土；混凝土水化热中图分类号：U44文献标志码：A文章编号：1003-5168（2023）08-0057-04DOI：10.19968/j.cnki.hnkj.1003-5168.2023.08.011SimulationAnalysisofHydrationHeatofConcreteAbutmentandCrackTreatmentZHANGZhi(LocalHighwayManagementSectionofXinpingCounty,YuxiCity,YunnanProvince,Yuxi653499,China)Abstract:[Purposes]Inordertoanalyzetheproblemofverticalcracksintheconcreteabutmentbodyduringconstruction,thetemperatureandstressfieldsoftheabutmentwerenumericallysimulated.[Methods]ThehydrationheatsimulationanalysisoftheinternalandexternaltemperatureandstressoftheabutmentbodyconcretewasconductedthroughMidasFEANXsoftware.[Findings]Theanalysisre⁃sultsshowthatthetemperaturedifferencebetweentheinsideandoutsideoftheabutmentconcreteislarge,andtheexternaltensilestressoftheabutmentconcreteexceedsthemeasuredtensilestrength(72~336h);Theanalysisresultsoftemperaturefield,stressfieldandtheactualcracksoftheabutmentbodyareanalyzedtofindoutthereasonsforthecracksoftheabutmentbody;bycomparingthemeasuredcrackswiththesimulationresults,itisfoundthattheMidas/FEANXcaneffectivelyanalyzethetempera⁃tureandstresschangesofconcretehydrationheat.[Conclusions]Combinedwiththecracksoftheabut⁃mentbo...
