（1 同济大学建筑设计研究院  上海 200092； 2  同济大学建筑工程系  上海 200092）
【提要】  南通市体育会展中心体育场是目前国内跨度最大的开闭式结构，采用整体式H型钢筋混凝土环梁加预应力管桩承台的基础形式。环梁承受水平荷载，预应力管桩承受竖向荷载，施工期间采取构造措施避免管桩水平破坏。利用有限元计算软件ANSYS对环梁基础进行受力计算，证明自平衡环梁基础是软土地区承受上部结构巨大水平荷载的一种有效结构形式。
【关键词】  开闭式结构  自平衡环梁基础  有限元计算  H型截面
Design of Selfequilibrium Reinforced Concrete Foundation of Circular Beam in H Section/Zheng Yimin1，Liu Yongcan2，Li Jie2，Shen Weiyu1 （1 The Architectural Design & Research Institute，Tongji University，Shanghai 200092，China； 2 Department of Building Engineering，Tongji University，Shanghai 200092，China）
Abstract:Nantong Sports Exhibition Center Stadium has the biggest span among the existing openingclosing structures in China. It adopts the foundamental form of integrated H section reinforced concrete circular beam and prestressed pipe pile cap. The horizontal load is born by the circular beam and the vertical load is born by the prestressed pipe pile. During the construction，tectonic measures are adopted in order to avoid horizontal destruction of pipe pile. Finite element method software ANSYS is utilized to measure the pressure on the foundation of circular beam in order to prove that selfequilibrium foundation of circular beam is an effective structure for soft soil field to bear great horizontal load from upper structure.
Keywords:openingclosing structure； selfequilibrium foundation；circular beam； finite element method； H section