混凝土整体式肋形结构主梁计算模型的简化  

Calculation model simplification of main beam in concrete monolithic ribbed floor

作　　者：郑元锋[1] 李溪喧[2] 李传才[3] 

机构地区：[1]福建水利电力职业技术学院水利系,福建永安366000 [2]武汉大学城市设计学院,湖北武汉430072 [3]武汉大学土木建筑工程学院,湖北武汉430072

出　　处：《武汉大学学报（工学版）》2008年第5期82-86,共5页Engineering Journal of Wuhan University

摘　　要：当主梁与柱的线刚度比大于某定值（3、4或5）时，混凝土整体式肋形结构中的主梁可简化为以柱为铰支座的多跨连续梁进行内力计算．对连续梁和框架两种不同的计算模型，分别计算了在不同的梁柱线刚度比κ情况下控制截面的内力，得到了不同跨数、不同荷载布置下的κ～β曲线．经比较分析认为：当k≥4时，主梁可简化成连续梁计算，此时两种计算模型控制截面内力的误差β均小于10％．本研究成果为肋形结构中主梁计算模型的简化问题作了详尽的说明．In general, with regard to reinforced concrete monolithic ribbed floor, the inner forces can be calculated by simplifying the main beam as multi span continuous beam with column as pinning supporting when the line stiffness ratio of main beam to column is more than a given value（3,4 or 5）. Through the two different calculation models of frame and continuous beam, the inner forces on some controlling sections are calculated respectively in terms of different line stiffness ratios of main beam to column and get κ-β curves under the various numbers of multi-span and the varied load arrangement. After comparative analysis, we believe we can calculate the inner forces by simplifying the main beam as continuous beam when κ is larger than 4, and at this moment the error β of controlling section inner forces in the two calculation models is less than 10%. This paper makes a detailed explanation of the simplification of calculation model in the main beam of monolithic ribbed floor.

关 键 词：混凝土结构 肋形结构 主梁 

分 类 号：TU37[建筑科学—结构工程]