预应力混凝土框架梁张拉反拱测试分析

Camber Testing Analysis on Prestressed Concrete Frame Beams

预应力混凝土结构设计中,当等效荷载仅抵消部分结构自重时,施工张拉反拱发生后的混凝土结构还会受到模板支撑结构的约束作用。对实际工程的两榀高支撑模板大跨预应力混凝土框架结构进行了较全面的施工张拉反拱检测,结果表明,施工期间模板支撑结构对张拉反拱效应会产生较大的影响。

Equivalent load partially balancing with deadweight,a prestressed concrete structure would be restricted by formwork support structure during its tensile construction phase. A camber test was conducted on two prestressed concrete frames with long spans and high formwork systems shoring on site. The result shows that the pretension effect of the prestressed concrete structures is significantly affected by the restraint of the formwork.