福州大学学报(自然科学版)
福州大學學報(自然科學版)
복주대학학보(자연과학판)
JOURNAL OF FUZHOU UNIVERSITY(NATURAL SCIENCE EDITION)
2015年
4期
536-541
,共6页
钢绞线%锈蚀%连续刚构桥%承载性能%退化
鋼絞線%鏽蝕%連續剛構橋%承載性能%退化
강교선%수식%련속강구교%승재성능%퇴화
strand%corrosion%continuous rigid frame bridge%bearing performance%degradation
通过分析钢绞线的锈蚀机理和性能,在已有研究基础上,建立氯盐侵蚀下考虑钢束腐蚀的预应力构件性能预测模型。对PC连续刚构桥进行寿命周期性能分析,预测钢绞线的腐蚀量和性能退化,分析寿命周期内应力状态与承载性能的演变规律。结果表明,结构抗弯承载力与抗裂性能退化明显,而抗剪承载力和抗压性能仍能达到规范要求。
通過分析鋼絞線的鏽蝕機理和性能,在已有研究基礎上,建立氯鹽侵蝕下攷慮鋼束腐蝕的預應力構件性能預測模型。對PC連續剛構橋進行壽命週期性能分析,預測鋼絞線的腐蝕量和性能退化,分析壽命週期內應力狀態與承載性能的縯變規律。結果錶明,結構抗彎承載力與抗裂性能退化明顯,而抗剪承載力和抗壓性能仍能達到規範要求。
통과분석강교선적수식궤리화성능,재이유연구기출상,건립록염침식하고필강속부식적예응력구건성능예측모형。대PC련속강구교진행수명주기성능분석,예측강교선적부식량화성능퇴화,분석수명주기내응력상태여승재성능적연변규률。결과표명,결구항만승재력여항렬성능퇴화명현,이항전승재력화항압성능잉능체도규범요구。
The performance prediction models of PC beam under chloride erosion is proposed, by ana-lyzing the corrosion mechanism and performance.The life cycle performance of a PC continuous rigid frame bridge is analyzed, the amount of corrosion strand and performance degradation is forecasted, the evolution of life cycle stress and bearing performance is researched.The results showed that the bending and crack resistance of concrete girders degraded significantly, while the main beam shear and compressive performance still meet regulatory requirements.