- 摘 要
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（廣州市城市規(guī)劃勘測設計研究院，510060）
［提要］廣州珠江帝景會所游泳池圓形屋頂直徑達34m，經過多方案比較，最后采用預應力混凝土梁體系。預應力主梁星形布置，每根內環(huán)柱支承斜向交叉的兩根主梁，次梁環(huán)向布置。計算采用空間桿系模型，梁柱節(jié)點為剛接。結算結果表明，屋蓋預應力大梁的撓度、裂縫寬度和控制截面的承載力均滿足規(guī)范的要求。預應力筋的布置高度上下錯開，避免了預應力相交的問題。工程的經驗可以供類似工程參數(shù)。
［關鍵詞］星形梁；有粘結預應力；裂縫寬度；承載力；撓度
Prestressed Concrete Beam Design of Swimming Pool Circular Roof in Guangzhou Riverside Regal Hotel/Liu Yongtian(Guangzhou Urban Planning & Design Survey Research Institute,Guangzhou 510060,China)
Abstract:The diameter of circle roof in swimming pool of Guangzhou Riverside Regal Hotel is 34m.The prestressed concrete beam system is adopted after comparison of serveral schemes.The prestressed concrete beams are distributed starshaped,and every inner circle column supports two main beams obliqueangled crossing.The secondary beams distribute circularly.The pole system model is used in calculation,and the joint of the beam to column is rigidity.The calculation results show that the deflection,crack width and bearing capacity of the control section satisfy the requirement of the code.The prestressed reinforcements are not at the same height to avoid the intersection of them.
Keywords:starshaped beam; bonded prestress; crack width; bearing capacity; deflection
