合肥工业大学学报（自然科学版）
閤肥工業大學學報（自然科學版）
합비공업대학학보（자연과학판）
Journal of Hefei University of Technology(Natural Science)
2015年
8期
1091-1096
,共6页
陈丽华%戴吉祥%金奇亮%王蓓%圣本林
陳麗華%戴吉祥%金奇亮%王蓓%聖本林
진려화%대길상%금기량%왕배%골본림
花纹钢管混凝土%黏结滑移本构关系%推出试验%特征黏结强度%珋τ-Sf曲线
花紋鋼管混凝土%黏結滑移本構關繫%推齣試驗%特徵黏結彊度%珋τ-Sf麯線
화문강관혼응토%점결활이본구관계%추출시험%특정점결강도%류τ-Sf곡선
concrete filled checkered steel tube(CFCST )%bond-slip constitutive relationship%push-out test%characteristic bond strength%-τ-St curve
为了对花纹钢管混凝土黏结强度和黏结滑移本构关系问题进行研究 ,文章考虑钢管花纹凸起高度和混凝土强度的变化 ,进行了9个花纹钢管混凝土试件的推出试验.根据荷载-自由端滑移曲线的试验结果 ,建立了花纹钢管混凝土特征黏结强度的统计回归公式 ,分析了花纹凸起高度和混凝土强度对特征黏结强度的影响 ,并提出典型的花纹钢管混凝土基准黏结滑移本构关系数学模型 :珋τ-Sf 曲线本构关系模型.根据典型的珋τ-Sf 曲线特点 ,将曲线划分3个阶段 ,并对3个阶段采用不同曲线进行拟合描述.研究结果表明 :花纹钢管的花纹凸起高度对特征黏结强度有显著影响 ;采用典型的珋τ-Sf 曲线模型能够很好地拟合试验曲线.试验结果可为花纹钢管混凝土黏结滑移性能和花纹钢管混凝土结构数值模拟提供参考.
為瞭對花紋鋼管混凝土黏結彊度和黏結滑移本構關繫問題進行研究 ,文章攷慮鋼管花紋凸起高度和混凝土彊度的變化 ,進行瞭9箇花紋鋼管混凝土試件的推齣試驗.根據荷載-自由耑滑移麯線的試驗結果 ,建立瞭花紋鋼管混凝土特徵黏結彊度的統計迴歸公式 ,分析瞭花紋凸起高度和混凝土彊度對特徵黏結彊度的影響 ,併提齣典型的花紋鋼管混凝土基準黏結滑移本構關繫數學模型 :珋τ-Sf 麯線本構關繫模型.根據典型的珋τ-Sf 麯線特點 ,將麯線劃分3箇階段 ,併對3箇階段採用不同麯線進行擬閤描述.研究結果錶明 :花紋鋼管的花紋凸起高度對特徵黏結彊度有顯著影響 ;採用典型的珋τ-Sf 麯線模型能夠很好地擬閤試驗麯線.試驗結果可為花紋鋼管混凝土黏結滑移性能和花紋鋼管混凝土結構數值模擬提供參攷.
위료대화문강관혼응토점결강도화점결활이본구관계문제진행연구 ,문장고필강관화문철기고도화혼응토강도적변화 ,진행료9개화문강관혼응토시건적추출시험.근거하재-자유단활이곡선적시험결과 ,건립료화문강관혼응토특정점결강도적통계회귀공식 ,분석료화문철기고도화혼응토강도대특정점결강도적영향 ,병제출전형적화문강관혼응토기준점결활이본구관계수학모형 :류τ-Sf 곡선본구관계모형.근거전형적류τ-Sf 곡선특점 ,장곡선화분3개계단 ,병대3개계단채용불동곡선진행의합묘술.연구결과표명 :화문강관적화문철기고도대특정점결강도유현저영향 ;채용전형적류τ-Sf 곡선모형능구흔호지의합시험곡선.시험결과가위화문강관혼응토점결활이성능화화문강관혼응토결구수치모의제공삼고.
Considering the influence of the height of checkered pattern and concrete strength ,the push-out tests of nine specimens of concrete filled checkered steel tube(CFCST ) were carried out to investi-gate the bond strength and bond-slip constitutive relationship between checkered steel tube and con-crete .According to the P-Sf curves of all specimens ,a set of calculative formulas of the characteristic bond strengths were presented by regression analysis and the effect of the height of checkered pattern and concrete strength on the characteristic bond strengths were analyzed .Basic bond-slip constitutive relationship model ,that is the classic-τ-St curve constitutive relationship model ,w as established by the mathematic method .The classic-τ-St curve was divided into three stages and the three stages were described with different curves .The experimental results show that the height of checkered pattern has a significant influence on the characteristic bond strengths and that the classic-τ-St curve constitu-tive relationship model matches well with the test curves .The experimental results may provide a ref-erence for the study of bond-slip behavior and numerical simulation of CFCST .
