CAJ | 학술논문

为了满足建筑功能和立面造型的要求,西宁站站房主体结构采用向站房两侧倾斜的钢筋混凝土框架体系,倾斜柱的倾角为18o,屋面采用79m大跨拱形钢桁架支撑于倾斜柱柱顶。由于独特的结构形态,倾斜框架柱受竖向荷载的二阶效应明显,导致结构各个施工阶段的内力状态不同,为了更准确、合理地确定结构的最不利受力状态,设计中采用了施工阶段模拟分析方法,并对计算结果进行了对比分析。为了有效控制倾斜框架柱的截面裂缝和侧向变形,设计中采用了预应力钢筋混凝土倾斜柱,并根据其受力特点对预应力束的束型和矢高进行了合理确定。
위료만족건축공능화립면조형적요구,서저참참방주체결구채용향참방량측경사적강근혼응토광가체계,경사주적경각위18o,옥면채용79m대과공형강항가지탱우경사주주정。유우독특적결구형태,경사광가주수수향하재적이계효응명현,도치결구각개시공계단적내력상태불동,위료경준학、합리지학정결구적최불리수력상태,설계중채용료시공계단모의분석방법,병대계산결과진행료대비분석。위료유효공제경사광가주적절면렬봉화측향변형,설계중채용료예응력강근혼응토경사주,병근거기수력특점대예응력속적속형화시고진행료합리학정。
In order to meet the requirements of building function and architectural facade, a reinforced concrete framework system, which would tilt to both sides of the station building by 18 degree, was used for the main structure of the station building of the Xining Railway Station;and a 79 m large-span arched steel truss was used for the roof covering, and was supported on the tops of the oblique columns. However, because of the unique structure form, a vertical load second-order effect obviously appeared on those oblique framework columns, leading to the result that there would be different internal forces in different construction stages of the same structure. In the design for the structure, focusing on that problem, each construction stage was simulated and analyzed, followed by comparative analysis on the calculation results, so as to determine the critical stress state more accurately and more reasonably. Furthermore, in order to effectively control the cross-section cracking and lateral deformation of the oblique framework columns, the oblique framework columns were designed to be made of prestressed concrete, and the shape and the rise of the prestreesed steel tendons were reasonably determined base on their mechanical performance.