大连中国石油大厦结构方案优化设计  

Optimum design on Dalian China Petrol Tower

作　　者：张小冬[1] 刘界鹏[1] 

机构地区：[1]哈尔滨工业大学建筑设计研究院,黑龙江哈尔滨150090

出　　处：《建筑结构学报》2009年第S1期27-33,共7页Journal of Building Structures

基　　金：国家自然科学基金资助项目(50708027);黑龙江省自然科学基金资助项目(E2007-24)

摘　　要：大连中国石油大厦结构内筒为钢筋混凝土筒体,结构外框地下4层至2层为框架,3层至45层为交叉桁架筒体,属超高层复杂结构。对钢结构外筒-钢筋混凝土内筒、钢筋混凝土外筒-钢筋混凝土内筒、钢管混凝土外筒-钢筋混凝土内筒、钢结构外筒-钢结构内筒(钢框架+内藏钢板支撑混凝土剪力墙筒体)、混合外筒(10层以下为钢管混凝土,其他为钢结构)-钢筋混凝土内筒5种结构体系形式进行了分析。分析结果表明,由于外筒具有很强的抗侧刚度,因此在设计中为强度控制而非变形控制。5种结构体系形式中,混合外筒-钢筋混凝土内筒结构体系形式的受力性能和经济性能最优越。针对混合外筒-钢筋混凝土内筒结构体系形式进行了结构质量分布偏心影响分析、结构抗倒塌能力分析、结构延性分析等方面的研究。研究结果表明,交叉桁架外筒-钢筋混凝土内筒结构体系具有很好的抗侧和抗扭刚度,抗倒塌性能优越;但水平地震作用下外筒桁架斜柱以受轴力为主,结构整体延性稍差,若外筒边缘杆件采用抑制屈曲支撑代替钢管斜柱,则结构将具有更优越的变形能力和延性。Dalian China Petrol Tower is a complex super high-rise structure,with reinforced-concrete(RC) tube and outer grid truss tube.Five structural systems were analyzed in this paper for this structure,including steel outer tube-RC core tube structure,RC outer tube-RC core tube structure,outer concrete-filled tube(CFT)-RC core tube structure,steel outer tube-steel core tube structure,hybrid outer tube-RC core tube structure.The analysis results indicate that the structural design is controlled by strength due to the high lateral stiffness of the outer tube.The hybrid outer tube-core RC tube structure is advantageous both in structural behavior and economic considerations.The mass eccentricity and anti-collapse ability and ductility of the hybrid outer tube-core RC tube structure are investigated in this paper,showing the lateral rigidity,torsional rigidity and anti-collapse ability are all excellent.The ductility of the hybrid outer tube-core RC tube structure under earthquake is relative low,because the diagonal columns of the outer grid truss tube are nearly under axial compression.Buckling restrained brace replacing the diagonal columns at the edge of the outer tube can effectively increase the ductility and deformation ability of the hybrid outer tube-core RC tube structure.

关 键 词：超高层建筑 交叉桁架 框架-筒体结构 筒中筒结构 延性 抑制屈曲支撑 

分 类 号：TU973.12[建筑科学—结构工程]