CAJ | 학술논문

对现役桥梁结构的安全性评估问题日益受到研究者的关注,如何在经济和技术条件允许的情况下,合理评估桥梁结构的安全性,避免灾害事故的发生,这是当前研究的热点问题之一。结合桥梁结构现场检测数据,利用修正系数法,即混凝土强度时变修正系数、钢筋强度修正系数、截面几何尺寸修正系数和结构刚度修正系数,来反映桥梁结构的现有实际状态,对某预应力混凝土多 T 梁桥进行安全性评估研究。结果表明,该梁桥的抗弯承载力评估系数和抗剪承载力评估系数均>1,且其抗弯承载力折减系数、抗剪承载力折减系数和刚度折减系数均>0.9,该桥使用功能良好且满足安全性要求。提出的方法可供其余类型的板梁结构受力分析和安全性评估作为参考。
대현역교량결구적안전성평고문제일익수도연구자적관주,여하재경제화기술조건윤허적정황하,합리평고교량결구적안전성,피면재해사고적발생,저시당전연구적열점문제지일。결합교량결구현장검측수거,이용수정계수법,즉혼응토강도시변수정계수、강근강도수정계수、절면궤하척촌수정계수화결구강도수정계수,래반영교량결구적현유실제상태,대모예응력혼응토다 T 량교진행안전성평고연구。결과표명,해량교적항만승재력평고계수화항전승재력평고계수균>1,차기항만승재력절감계수、항전승재력절감계수화강도절감계수균>0.9,해교사용공능량호차만족안전성요구。제출적방법가공기여류형적판량결구수력분석화안전성평고작위삼고。
The safety evaluation problem of the existed bridge structure absorbs more attention from many researchers. If the economic and technology conditions are admitted,how to evaluate the bridge structure correctly and avoid the engi-neering accident is one of the worth researching problems.Combined with the measured data of the practical bridge structure and using the correctional coefficient method,including the correctional coefficients of concrete strength,reinforced steel strength,sectional dimensions and structural stiffness,study the practical working status of the structure,and the safety e-valuation of the prestressed concrete multi-T girder bridge is completed.The results show that the evaluating coefficient of bending ultimate load and that of shearing ultimate load are both more than 1.The reducing coefficient of bending ultimate load and that of shearing ultimate load are both more than 0.9.The structure satisfies the use safety requirements.The re-search method can be used as reference for the mechanical analysis and the safety evaluation of other kinds of beam struc-tures.