增大截面加固梁的正截面抗弯性能试验  

Experimental research on flexural behavior of concrete beams strengthened by section enlargement

作　　者：沈华[1] 

机构地区：[1]南通职业大学建筑工程学院,江苏南通226007

出　　处：《辽宁工程技术大学学报（自然科学版）》2013年第12期1639-1645,共7页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金资助项目(50478100);南通市重点实验室资助项目(DC2010001)

摘　　要：就增加截面加固梁的正截面抗弯性能进行了试验研究,得出了荷载挠度曲线、钢筋和混凝土的荷载应变曲线、梁的裂缝分布和破坏形态。试验结果表明:增大截面加固梁能有效提高抗弯承载力和抗弯刚度,同时可有效降低原梁纵筋的应力水平,改善了梁的变形能力.An experiment was carried out to study the flexural behavior of concrete beams strengthened by section enlargement. Through the testing the load-deflection curve of beam, the load-strain curve of steel and concrete,the cracking distribution and failure pattern were obtained. The results show that the method of section enlargement can increase the ultimate load and the stiffness of beam effectively, decrease the stress level of original beam's longitudinal steel bar, improve the capability of beam's deformation at same time.

关 键 词：增大截面 结构加固 试验研究 抗弯性能 混凝土梁 

分 类 号：TU375.1[建筑科学—结构工程]