T形钢梁加强负弯矩区组合框架梁的试验研究  

Composite Steel-concrete Frame Beam with Reinforced Negative Bending Regions

作　　者：杜新喜[1] 骆顺心[1] 程晓燕[1] 施浩[1] 

机构地区：[1]武汉大学土木建筑工程学院,湖北武汉430072

出　　处：《重庆建筑大学学报》2006年第4期56-58,86,共4页Journal of Chongqing Jianzhu University

摘　　要：针对框架梁在梁端存在较大负弯矩及混凝土不能承受较大拉应力的状况,提出了在框架梁的负弯矩区段采用T形钢梁加强的组合框架梁模型。通过两个组合框架梁单层框架足尺模型的试验研究,得到新型组合框架梁的荷载-挠度曲线,截面应变分布曲线。从组合框架梁与一般组合梁的试验结果对比可看出,T形加强截面能有效提高梁的刚度,使框架梁刚度分布趋于合理。最后,提出并验证了按T形肋截断位置分成三段刚度不同的梁分析组合框架梁的方法。Considering the large negative bending moment at the end of frame beam and low tensile strength of concrete, a new composite steel -concrete frame beam（ CSCFB）, reinforced by a T shape steel beam at the negative bending regions, was brought forward. Through two full - scale of single - layer CSCFB frame models experiment, the load - displacement curves of CSCFB and strain distribution at cross section were obtained. Compared beam, the T shape reinforcing section can enhance the beam stiffness effectively, and make segment flexural rigidity method is presented and validated. with the ordinary composite it distribute reasonably.

关 键 词：组合框架梁 连续组合梁 钢框架 负弯矩区加强 

分 类 号：TU398[建筑科学—结构工程]