大跨度型钢混凝土梁与预应力混凝土梁分析

Analysis of Long-span Steel Reinforced Concrete Beam and Prestressed Concrete Beam

型钢混凝土与预应力混凝土是常用的解决大跨度混凝土梁的技术方案。本文从设计、施工、经济性三个方面比较分析了两种结构形式的差异性。分析表明,大跨度梁采用型钢混凝土在承载力设计的受力性能及满足规范指标方面较预应力混凝土有优势,在裂缝控制方面则反之;同时,型钢混凝土梁要付出更大的施工工期、额外施工措施及工程造价的代价。对类似工程设计选型具有一定借鉴意义。

Steel reinforced concrete and prestressed concrete are commonly used scheme to solve the technical problem of long span concrete beam. This paper compares and analyzes the differences of the two structural forms from three aspects such as design,construction and economical efficiency. The analysis shows that the steel reinforced concrete for long-span beam has an advantage over the prestressed concrete in the design of bearing capacity and meeting the specification,but not in the crack control. At the same time,the steel reinforced concrete beam needs a larger construction period,additional construction measures and the cost of the project. It has certain reference significance for similar engineering design and selection.