装配式预应力混凝土框架梁端延性影响因素分析  

Analysis on Factors Affecting Ductility of Prefabricated Prestressed Concrete Beam End

作　　者：许磊[1] 于江[1] 张利新 乐风江[1] XU Lei YU Jiang ZHANG Lixin YUEFengjiang(Institute of Civil Engineering, Xinjiang University, Urumqi 830047, China Xinjiang Seven Star Construction Polytron Technologies Inc ,Urumqi 830099, China)

机构地区：[1]新疆大学建筑工程学院,乌鲁木齐830047 [2]新疆七星建设科技股份有限公司,乌鲁木齐830099

出　　处：《结构工程师》2017年第3期51-57,共7页Structural Engineers

基　　金：新疆七星建筑股份有限公司委托新疆大学的横向课题"端部释放预应力框架梁端延性研究"(201404101022)

摘　　要：在装配式预应力混凝土梁的低周反复加载试验基础上,利用ABAQUS有限元软件对试验构件进行数值模拟,并研究受压区高度与剪跨比对装配式预应力混凝土梁位移延性、极限承载力的影响。分析结果表明,在合理受压区高度范围内,减小受压区高度有利于提高构件的位移延性系数与极限承载力,而受压区过低会出现脆性破坏特征;剪跨比的增加有利于增加位移延性,但会造成极限承载力的降低。在合理受压区高度与剪跨比范围内框架梁的破坏主要集中在梁根部。Based on the low-cycle experiments on prefabricated prestressed concrete beam, numerical analyses were conducted using the finite element software ABAQUS to investigate effects of compression zone depth and shear span ratio on the displacement ductility and ultimate bearing capacity of the specimens. The analysis results showed that in a reasonable range of compression zone depth, decrease of the compressive zone depth was beneficial to the improvement of the displacement ductility and ultimate bearing capacity, and brittle failure would be caused while the depth of compression zone is too low. Increase of the shear-span ratio can improve the displacement ductility, but detrimental to the ultimate bearing capacity of the members. In the reasonable range of compression zone depth and shear span ratio, beam ends. damage of the frame beam mainly concentrated at the

关 键 词：装配式预应力混凝土 数值模拟 延性 受压区高度 剪跨比 

分 类 号：TU378[建筑科学—结构工程]