结构工程师2025，Vol.41Issue(4)：1-8,8.DOI:10.15935/j.cnki.jggcs.202504.0001
考虑开洞的现浇混凝土空心楼盖经验系数法
Empirical Coefficient Method for Cast-in-Situ Concrete Hollow Floor with Openings
摘要
Abstract
Openings are often used in cast-in-situ concrete hollow floors and the current direct design method does not consider the influence of the openings.In this paper,270 case studies on 3x3 span box filler hollow floors with openings were analyzed using software ABAQUS.The effects of four parameters on the moment distributions of the hollow floors were investigated,i.e.,the opening position,opening area ratio,slab span ratio and the beam-slab relative flexural stiffness ratio.The obtained results included the moment distribution coefficients for control sections of the floor strips,as well as the moment distribution coefficients for column strips.These results were also compared with the coefficients recommended by the code.It was found that the opening in the hollow floor weakened the section stiffness at the opening position,reduced the moment distribution coefficients of the section,and consequently increased the moment distribution coefficients of other sections.In the presence of an opening,the recommended values in the code are appropriate for the moment distribution coefficients for control sections of both the interior and end span.However,the moment distribution coefficients for the column strips in the code are not applicable and it is recommended to adopt the moment distribution coefficients proposed in this paper for the column strips,which account for openings.关键词
空心楼盖/经验系数法/开洞/弯矩分配系数/有限元分析Key words
hollow floor/direct design method/opening/moment distribution coefficient/finite element analysis分类
建筑与水利引用本文复制引用
钱惠雅,秦璞,林峰..考虑开洞的现浇混凝土空心楼盖经验系数法[J].结构工程师,2025,41(4):1-8,8.基金项目
国家自然科学基金面上项目(52178150) （52178150）
