锈蚀L形钢筋混凝土剪力墙抗震性能试验研究

打开文本图片集

关键词：钢筋混凝土剪力墙；拟静力试验；抗震性能；钢筋锈蚀；干湿循环 中图分类号：TU375；TU317.1 文献标志码：A DOI：10.16385/j.cnki.issn.1004-4523.202307064

Abstract：Tostudytheinfluenceofdferentdegrees ofsteelcorrosionandaxialcompressionratioontheseismicperformanceof corrodedL-shapedreinforced concrete（RC）shearwalls，thetest specimensof5-shapedRCshearwalswithasheartospanra tioof2.5weresubjectedtacceleratedcorrosionbyusingdryetccleandextealcurrentcorrosionmethod，thenthespies weresubjected toapseudo-statictest.The testresultsshowthat withthe increaseofcorosiondegree，thebearing capacityofthe specimensgradualldecreased，andthedecreaserateofpositive（flangetension）bearingcapacitywashgherthanthatofthenega tive（flangecompresio）hespecimendeformationndenergydisipationcapacityeteroratedtovaryingdegrees，tfss degradationaggravated，andthepercentageofsheardeformationinthepositivepeak pointincreased.Whenthedegreeofcorrosion wasequal，withthicreaseofteaxialcompresioratio，tepositivefluremodeoftecorrodedspecimendevelopdintoal eccentricfailureprogresively.Inthemeantime，thepositivebearingcapacityofthespecimensfrstincreasedandtendecreased， whilethe negativebearingcapacityofthetestspecimens graduallyicreased，andtheincreaserateofthenegativebearingcapacity wasgreaterthanthatofthepositive；thedeformationcapacityofthespecimensconstantlydecreased，ndthedecreaserateofthe positivedeformationcapacitywas greaterthanthatof tenegative；theenergydissipationcapacity，sheardeformationandpercent age of shear deformation of the specimens all decreased continuously.

Keywords： reinforced concrete shearwals；pseudo-static test；seismic behavior;reinforcement corrosion；drywetcycle

钢筋混凝土（RC）结构在服役过程中受环境侵蚀，会产生耐久性损伤，并随结构服役年限增长而逐渐加重，其中，钢筋锈蚀是RC结构最主要的耐久性损伤之一[1]。（剩余15715字）