摘要
重庆某邮轮港综合体项目由6个云塔楼、5个连桥以及大底盘裙房构成,通过设置两道防震缝分解为三个独立抗震单元,每个单元均由“大底盘双塔+弱连接连桥”构成。其中云塔楼为钢框架-混凝土剪力墙结构,连桥由4个钢桁架和1个悬索桥构成。以3#~4#云大底盘双塔及3#云塔楼为重点,阐述悬挑+转换+跃层云塔楼结构楼面桁架的布置难点,以及设计过程中如何解决多塔周期比、层间刚度比、承载力比、巨柱设计、楼盖设计、节点设计等难题。结果表明:与核心筒角部相连的转换桁架应优先采用正交布置,以保证施工可靠性;长悬挑多塔模型的周期比相较于单塔模型更为敏感,弱化周边区域荷载是解决问题的关键;跃层结构的层间刚度比及层间承载力比需注重并层数据处理,避免薄弱层误判;圆钢管柱的防连续倒塌设计可采用偶然荷载法结合直接分析法验算;悬挑转换结构楼盖设计应考虑施工次序的优化,设置后浇块,降低楼盖拉应力。
The cruise port complex project in Chongqing consists of six cloud towers,five connecting bridges and a large chassis podium.By setting up two seismic joints,it is decomposed into three independent seismic units,each consisting of a"large-chassis twin towers and weakly-connected connecting bridge".The cloud tower adopts a steel frame-concrete shear wall structure,and the connecting bridge consists of four steel trusses and one suspension bridge.Focusing on the 3#~4#large-chassis twin cloud towers and the 3#cloud tower,the layout difficulties of the floor trusses in the cloud tower structure with cantilever transfer and jumping floor system were elaborated,as well as how to solve the problems of multi-tower period ratio,inter story stiffness ratio,bearing capacity ratio,giant column design,floor design,node design,etc.in the design process.The results indicate that the transfer truss connected to the corner of the core tube should be prioritized for orthogonal arrangement to ensure construction reliability.The period ratio of the long cantilever multi tower model is more sensitive than that of the single tower model,and weakening the load in the surrounding area is the key to solving the problem.The inter story stiffness ratio and inter story bearing capacity ratio of the jump layer structure need to pay attention to layer data processing to avoid misjudgment of weak layers.The anti-progressive collapse design of round steel pipe columns can be verified by combining the accidental load method with the direct analysis method.The design of cantilever conversion structure floors should consider the optimization of construction sequence,setting post pouring blocks to reduce the tensile stress of the floor.
作者
夏昊
孙超
李寅斌
XIA Hao;SUN Chao;LI Yinbin(National Engineering Research Center of Building Technology,Beijing 100013,China;China Academy of Building Research,Beijing 100013,China)
出处
《建筑结构》
北大核心
2026年第4期93-100,共8页
Building Structure
关键词
复杂塔楼结构
多塔周期比
防连续倒塌设计
偶然荷载法
空间板壳受力
大悬挑桁架节点
complex tower structure
multi-tower period ratio
anti-progressive collapse design
accidental load method
spatial shell stress
large cantilever truss joint
