全跨无粘结混凝土梁抗力性能仿真分析  

Finite Element Analysis on Resistance Performance of Full-Span Unbonded Concrete Beam

作　　者：刘九晏 赵鹏[1,2] 赵娟[1,2] 徐港[1,2] 

机构地区：[1]三峡大学三峡库区地质灾害教育部重点实验室,湖北宜昌443002 [2]三峡大学土木与建筑学院,湖北宜昌443002

出　　处：《水电能源科学》2017年第1期145-148,共4页Water Resources and Power

基　　金：国家自然科学基金项目(51109121;51379111);湖北省科技支撑计划项目(2014BCB035)

摘　　要：为进一步研究全跨无粘结混凝土梁的抗力性能,基于ABAQUS有限元软件,对全跨无粘结梁与完好梁的承载力及变形性能进行了仿真对比分析。结果表明,当全跨无粘结梁与完好梁的配筋方式及材料力学性能一致,受拉纵筋锚固良好且可进入屈服阶段时,全跨无粘结梁的极限承载力略高于完好梁,但钢筋有无粘结对混凝土梁的开裂荷载影响不大;混凝土开裂前全跨无粘结梁与完好梁抗弯刚度基本一致,但混凝土开裂后全跨无粘结梁的抗弯刚度明显小于完好梁,且其总变形量较完好梁大。The bearing capacity and deformation performance of full-span unbonded beam along with normal beam were simulated and compared by ABAQUS for further explore of the resistance performance of full-span unbonded con crete beam. The results indicate that when reinforcement form and materials＂ mechanical properties were in accordance, as well as the tensile longitudinaI bars were anchored well and could be yielded, the bearing capacity of full-span unbonded concrete beam was slightly higher than the normal beam; however, for its＂ cracking capacity, there were no significant impact for the existence of binding action of the bar; the flexural stiffness of full-span unbonded concrete beam and nor- mal beam were the same before the cracking of concrete. But after concrete cracked, the flexural stiffness of the former was smaller than the latter, and the total deformation of unbonded concrete beam was larger than the normal beam.

关 键 词：钢筋混凝土梁 无粘结 抗力性能 耐久性 ABAQUS 

分 类 号：TU375.1[建筑科学—结构工程]