摘要
为了提高大跨度结构的正常使用性能,通常在混凝土结构中施加预应力.结果表明,预应力混凝土结构具有更好的使用性、耐久性和大跨度适用性,其中预应力混凝土空心板结构在不显著降低承载力和刚度的前提下明显减小结构自重,预应力型钢混凝土梁(板)结构采用较小的截面尺寸即可满足承载力和刚度的需求.开发城市地下空间是解决城市用地紧张的有效手段,我国地下大跨空间常用的结构形式主要包括密排框架(肋梁)结构、折板或拱形结构、变截面(加腋)板结构、预应力混凝土结构、型钢-混凝土组合结构和Y形柱结构6种形式,相比之下,跨度较大时宜采用预应力结构.
To improve the normal performance of large-span structures,prestressing is usually applied in concrete structures.The results indicate that prestressed concrete structures have better usability,durability,and large-span applicability.Among them,prestressed concrete hollow slab structures significantly reduce the weight of the structure without significantly reducing the bearing capacity and stiffness.The prestressed steel reinforced concrete beam(slab)structure can meet the requirements of bearing capacity and stiffness using smaller cross-sectional dimensions.Developing urban underground space is an effective means to solve the shortage of urban land.The commonly used structural forms of underground large-span spaces in China mainly include six forms:densified frame(ribbed beam)structure,folded plate or arched structure,variable section(haunched)plate structure,prestressed concrete structure,steel-concrete composite structure,and Y-shaped column structure.In contrast,prestressed structure is preferred when the span is large.
作者
梁书亭
王文康
朱筱俊
徐义威
韩天成
董俊
Liang Shuting;Wang Wenkang;Zhu Xiaojun;Xu Yiwei;Han Tiancheng;Dong Jun(Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education,Southeast University,Nanjing 210096,China;Architectural Design and Research Institute Co.,Ltd.,Southeast University,Nanjing 211189,China;China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,China)
出处
《东南大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2024年第3期559-566,共8页
Journal of Southeast University:Natural Science Edition
基金
江苏省“六大人才高峰”资助项目(1105000150)
中国铁建股份有限公司科研资助项目(2021-B19)
江苏省研究生科研与实践创新计划资助项目(3305002304D)。
关键词
大跨度结构
城市地下空间
预应力技术
预应力空心结构
预应力型钢混凝土结构
工程案例
large-span structures
urban underground space
prestressing technology
prestressed hollow structures
prestressed steel reinforced concrete structures
engineering case