CAJ | 학술논문

针对混凝土的时变变形对钢管混凝土组合结构施工过程中结构受力的影响,基于CEB-FIP中的混凝土时变模型,提出了对钢管混凝土组合高层框架结构进行施工过程计算的时变模型,以考虑结构的施工顺序和诸如混凝土的收缩、徐变等时变效应的影响以反映此类结构的真实特性.通过某21层钢混组合高层框架结构的数值模拟与现场监测结果的对比表明:提出的分析模型能够真实反映结构复杂的施工过程及材料时变特征和结构几何非线性对结构性能的影响,数值模拟结果表明混凝土收缩和徐变引起的结构变形在高层结构设计中不容忽视.
침대혼응토적시변변형대강관혼응토조합결구시공과정중결구수력적영향,기우CEB-FIP중적혼응토시변모형,제출료대강관혼응토조합고층광가결구진행시공과정계산적시변모형,이고필결구적시공순서화제여혼응토적수축、서변등시변효응적영향이반영차류결구적진실특성.통과모21층강혼조합고층광가결구적수치모의여현장감측결과적대비표명:제출적분석모형능구진실반영결구복잡적시공과정급재료시변특정화결구궤하비선성대결구성능적영향,수치모의결과표명혼응토수축화서변인기적결구변형재고층결구설계중불용홀시.
In view of the influence of time-dependent deformations of concrete on steel tube and concrete composite structures in the construction process, this paper presents a time-dependent analysis model for high-rise building with concrete filled steel tube (CFST) considering the construction sequences and the time-dependent effect such as the shrinkage,creep of concrete, which can reflect the real behavior of structures in the construction process. Finally, numerical results of a 21-story steel and concrete composite frame structure are compared with those obtained from spot monitoring test, which prove that the analytical model can reflect the structural effects of a complex construction process as well as the geometry nonlinear and time dependent behavior of the materials. And the numerical simulation results show that the deformation of the structure caused by shrinkage and creep of concrete during construction can not be ignored in the design of high-rise building structures.