免拆卸水泥复合模板-结构混凝土梁的抗弯性能研究

通过对2根梁试件（一根免拆卸模板混凝土梁，一根普通混凝土梁）的试验，研究了免拆卸模板混凝土受弯梁在单调荷载作用下的基本力学性能，包括荷载挠度变化规律、跨中混凝土应变、受力钢筋应变、正截面承载力、破坏形态等，对免拆卸模板一结构混凝土梁与普通混凝土梁的受力性能进行了对比。实验结果表明：采用现行规范计算免拆卸模板一结构混凝土梁的抗弯承载力具有较高的安全性能；免拆卸模板一结构混凝土梁能够满足挠度限值的要求；免拆卸模板．结构混凝土梁具有与常规混凝土梁相近的抗弯性能。

Research on Flexural Behavior of Concrete Beams Without Demoulding of Cementitious Composite Formwork

Based on experiments on two beam specimens （one is a concrete beam with a formwork without demoulding, another is a normal concrete beam）, the basic mechanical properties of the flexural beam with a formwork without demoulding under the condition of monotonic loads are studied, including failure patterns, nor- section bearing capacities, change rules of deflections, concrete strain of midspan, strain of strengthened re- inforcing steel and so on. The comparison of bearing capacity is made between a concrete beam with a formwork without demoulding and an ordinary concrete beam. The results indicate that by calculating bend-bearing capaci- ty in current code, a beam with a formwork without demoulding is as safe as an ordinary concrete beam, with its deflection meeting the requirements of deflection limit value and its bend-bearing capacity approximately equal to an ordinary concrete beam.