超重及超跨长现浇框架梁底模预拱度的控制

Control of bottom model pre-arch of extra-heavy and extra-long-span cast-in-situ frame beam

简述了合理设置梁底模预拱度的重要性,结合具体实例,对影响预拱度设置的主要因素进行了研究,并通过对竖向挠度、荷载等的分析计算,指出设置合理的预拱度可提高梁底楼面标高的准确度,从而保证了超重、超跨长现浇梁结构的质量安全。

The thesis introduces the importance of rationally setting bottom beam pre-arch. Combining with specific examples, it studies major factors influencing pre-arch setting, calculates vertical deflection and load, and finally points out that： rationally setting pre-arch can improve the accuracy of standard bottom beam height. Thus, it guarantees the quality safety of extra-heavy and extra-long-span cast-in-situ beam structure.