长沙理工大学学报（自然科学版）
長沙理工大學學報（自然科學版）
장사리공대학학보（자연과학판）
Journal of Changsha University of Science and Technology (Natural Science)
2015年
3期
50-55
,共6页
彭建新%阳逸鸣%唐皇%张建仁%刘扬
彭建新%暘逸鳴%唐皇%張建仁%劉颺
팽건신%양일명%당황%장건인%류양
锈蚀钢筋%蚀坑%力学性能%断口特征%强度模型
鏽蝕鋼觔%蝕坑%力學性能%斷口特徵%彊度模型
수식강근%식갱%역학성능%단구특정%강도모형
corroded reinforcement%pitting%mechanical properties%fracture characteristic%strength model
通过对126根锈蚀钢筋进行拉伸试验,研究了蚀坑特征及其锈蚀后力学性能。研究发现,锈蚀钢筋最大名义屈服强度较标准试件提高了7.65%,伸长率下降最大可达52.94%；锈蚀钢筋拉伸试验后断口形态为锯齿式断口和劈裂式断口；蚀坑最大深度、宽度、长度分别不超过8,15,16 mm,并且三者的对数值与质量锈蚀率呈线性关系,深宽比与质量锈蚀率呈指数关系。还建立了与深宽比均值相关的名义屈服强度的退化模型和计算模型。
通過對126根鏽蝕鋼觔進行拉伸試驗,研究瞭蝕坑特徵及其鏽蝕後力學性能。研究髮現,鏽蝕鋼觔最大名義屈服彊度較標準試件提高瞭7.65%,伸長率下降最大可達52.94%；鏽蝕鋼觔拉伸試驗後斷口形態為鋸齒式斷口和劈裂式斷口；蝕坑最大深度、寬度、長度分彆不超過8,15,16 mm,併且三者的對數值與質量鏽蝕率呈線性關繫,深寬比與質量鏽蝕率呈指數關繫。還建立瞭與深寬比均值相關的名義屈服彊度的退化模型和計算模型。
통과대126근수식강근진행랍신시험,연구료식갱특정급기수식후역학성능。연구발현,수식강근최대명의굴복강도교표준시건제고료7.65%,신장솔하강최대가체52.94%；수식강근랍신시험후단구형태위거치식단구화벽렬식단구；식갱최대심도、관도、장도분별불초과8,15,16 mm,병차삼자적대수치여질량수식솔정선성관계,심관비여질량수식솔정지수관계。환건립료여심관비균치상관적명의굴복강도적퇴화모형화계산모형。
Based on 126 corroded reinforced tensile tests,pits characteristics and mechanical properties of the corroded reinforcing bars were researched.It was found from tested results that:the maximum nominal yield strength of corroded steel bars can be improved by 7.65%than the standard specimen,the maximum decreased elongation was up to 52.94%;the fracture morphology of the corroded steel reinforcement are sawtooth and splitting types af-ter the tensile test;the maximum depth,width and length of pits were not more than 8, 15,1 6 mm,and have a linear relation to mass corrosion rate of corroded reinforcements. The depth to width ratio and mass corrosion rate has an exponential relationship;the degra-dation and calculation model of the nominal yield strength related with the average of depth to width ratio was developed.
