在建筑工程施工中,结构起拱是经常遇到的问题,结构起拱虽在有关规范中有了规定,但在实践中起拱方法仍有一些问题值得探讨。通过分析研究,以求对结构起拱有一个比较正确的作法。一、整体式钢筋混凝土梁与预制梁起拱现浇梁主要靠模板起拱,有的施工人员仅将梁底起拱,而梁顶保持水平,造成梁跨中截面高度减小,经核算跨中高度每减小1cm,抗弯承载能力约 In the construction of a building, the arching of the structure is a frequently encountered problem. Although the arching of the structure is stipulated in the relevant specifications, there are still some problems to be explored in the arching method in practice. Through analysis and research, there is a relatively correct approach to arching the structure. 1. Integral Reinforced Concrete Beams and Prefabricated Beam Arching Cast-in-place beams are mainly arched by formwork. Some construction workers only arch the bottom of the beam while the beam top is kept horizontal, resulting in a reduction in the cross-section height of the beam’s midspan. For every 1cm decrease in mid-height, bending capacity is about