粘钢加固达到承载力极限状态混凝土梁试验研究与有限元分析  

Experimental study and finite element analysis of concrete beam strengthened by bonded steel with the ultimate bearing capacity

作　　者：褚少辉 赵士永 郝军兵 刘淑红[5] Chu Shao-hui;Zhao Shi-yong;Hao Jun-bing;Liu Shu-hong(Hebei Building Research Technology Co.Ltd,Shijiazhuang 050021,China;The Technology Innovation Centre of Comprehensive Reconstruction Existing Buildings of Hebei,Shijiazhuang,050021,China;Hebei Academy of Building Research,Co.Ltd,Shijiazhuang 050021,China;Qingdao Branch of China Railway Signal&Communication Shanghai Engineering Bureau Group Co.Ltd,Qingdao 266200,China;Shijiazhuang Tiedao University,Shijiazhuang 050043,China)

机构地区：[1]河北建研科技有限公司,河北石家庄050021 [2]河北省既有建筑综合改造技术创新中心,河北石家庄050021 [3]河北省建筑科学研究院有限公司,河北石家庄050021 [4]中国铁路通信信号上海工程局集团有限公司青岛分公司,山东青岛266200 [5]石家庄铁道大学,河北石家庄050043

出　　处：《工程抗震与加固改造》2020年第4期40-45,共6页Earthquake Resistant Engineering and Retrofitting

基　　金：国家重点研发计划(2016YFC0802207);河北省建设科技研究计划(2019-2026)。

摘　　要：混凝土结构是我国建筑中最常见的结构形式,由于种种原因需要对其进行加固。而在实际工程中部分混凝土梁已经达到其承载力极限状态,对这种达到承载力极限状态的混凝土梁进行加固的相关研究较少。因此,本文采用试验研究与有限元分析相结合的方法,研究粘贴钢板加固达到承载力极限状态混凝土梁的力学性能。研究发现,达到抗弯承载力极限状态混凝土梁采用粘贴钢板加固后,刚度、屈服荷载、极限承载力均有较大幅度的提高,但延性出现了降低;建立了适用于分析达到极限承载力混凝土梁的有限元模型,模拟计算结果与试验数据基本吻合,说明所建模型是可靠的;卸载程度越大,粘贴钢板加固之后承载力提升越高,但是差别不大,在实际工程中,应该充分考虑现实情况,确定其卸载的程度。Concrete structure is the most common form of structure in our country,and need to be reinforced for various reasons.However,some concrete beams have reached their ultimate bearing capacity state in practical engineering.There are few researches on the reinforcement of concrete beams that reach the ultimate bearing capacity.Therefore,this paper adopts the methods of experimental research and finite element analysis to study the mechanical properties of concrete beams strengthened with steel plates to the ultimate bearing capacity.It is found that the stiffness,yield load and ultimate bearing capacity of concrete beams are greatly increased when they are strengthened by using the adhesive steel plate,but the ductility is reduced.Through the establishment of appropriate finite element model,the simulation results are basically consistent with the experimental results,indicating that the model is basically reliable.The greater the degree of unloading,the higher promotion of the bearing capacity after bonded steel plate,but the difference is not obvious.In actual engineering,the actual situation should be fully considered to determine the degree of unloading.

关 键 词：粘钢 承载力极限状态 混凝土梁 加固 ANSYS 

分 类 号：TU375.1[建筑科学—结构工程]