(中国建筑西北设计研究院有限公司, 西安 710018)

摘要: 青州博物馆新馆是一座国家一级综合性博物馆,具有独特的建筑立面造型和复杂的平面功能布局,且结构平面及竖向布置不规则。 结合建筑特点,阐述了结构设计的难点。 基于整体模型计算结果,分析比较了两种主体结构体系,最终采用了钢筋混凝土框架-剪力墙结构,并对其进行了小震弹性和大震动力弹塑性时程分析。 通过综合比较中庭上方大跨度楼盖两种结构形式的优缺点,选择了双向平面钢桁架梁+钢筋桁架楼承板楼盖,并对其进行了竖向地震作用分析。 对于长悬挑外檐结构设计、结构体型收进以及楼板错层,提供了相应的解决方案。 针对超长混凝土结构的温度和收缩裂缝控制进行了分析,给出了一些设计和施工措施。 结果表明:结构受力合理、传力明确,实现了结构安全和建筑创意的完美融合。

关键词: 青州博物馆; 超长结构; 大跨度楼盖; 长悬挑外檐; 结构选型; 缓粘结预应力

中图分类号:TU318 文献标志码:A 文章编号:1002-848X(2022)11-0029-07

DOI:10. 19701 / j. jzjg. XBY2227

Structural design of the new Qingzhou Museum

JIA Junming, TAO Beilin, CHE Shunli, DONG Kaili, LI Jianbing, ZHANG Yao

(China Northwest Architectural Design and Research Institute Co. , Ltd. , Xi’ an 710018, China)

Abstract: The new Qingzhou Museum is a national first-class comprehensive museum with unique building facade shape and complex plane function layout, and the structural plane and vertical layout are irregular. Combined with the architectural characteristics, the difficulties in structural design were introduced. Based on the calculation results of the overall model, the two main structural systems were analyzed and compared. The reinforced concrete frame-shear wall structure was finally adopted, and the elastic time history analysis of frequent earthquakes and dynamic elastic-plastic time history analysis of rare earthquake were carried out. By comprehensively comparing the advantages and disadvantages of two structural types of long-span floor above the atrium, the floor system of the two-way plane steel truss+steel-bars truss deck was selected, and the vertical seismic action analysis was carried out. The corresponding solutions were provided for the structural design of long cantilevered outer eaves, the retraction of structural shape and the staggered floor. The temperature and shrinkage crack control of super long concrete structure were analyzed, and some design and construction measures were given. The results show that the structural force is reasonable and the force transmission is clear, realizing the perfectintegration of structural safety and architectural creativity.

Keywords:Qingzhou Museum; overlong structure; large-span floor; long cantilever outer eaves; structural selection;slowly bonded prestress