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梁板叠合构件斜截面受力性能试验研究*
周开富1,2,魏欣2,葛文杰2,曹大富2
摘 要

(1 扬州大学工程设计研究院, 扬州 225000; 2 扬州大学建筑科学与工程学院, 扬州 225127)

[摘要]设计制作了9根梁板叠合构件和3根梁板整浇构件进行静力受剪性能试验,研究试件的开裂荷载、裂缝形态和发展规律、极限荷载及破坏形态等。结果表明:支座与加载点连线中部位置上的主要受力箍筋发生屈服,最终腹剪斜裂缝两侧混凝土产生明显错动,构件破坏,且均呈剪压破坏形态;叠合构件在最端部传剪器处会产生斜向支座方向的裂缝;叠合面上从构件端部至加载点范围产生水平裂缝;剪跨比对受剪承载力的影响大,箍筋间距对发生剪压、斜拉破坏的构件受剪承载力的影响较发生斜压破坏的试件明显。

[关键词]梁板叠合构件; 传剪器; 受剪性能; 试验研究

中图分类号:TU375-1文献标识码:A文章编号:1002-848X(2017)24-0076-07

 

Experimental research on the mechanical behavior on diagonal sections of beam-slab composite component

Zhou Kaifu1, 2, Wei Xin2, Ge Wenjie2, Cao Dafu2

(1 Engineering Design and Research Institute, Yangzhou University, Yangzhou 225000, China; 2 College of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, China)

Abstract:Static shear performance experiment of 9 RC beam-slab composite components and 3 beam-slab casting components were carried out, cracking load, cracking shape and developing rule, ultimate load and failure mode were studied.  The results show that the stirrup stress on the middle of the loading point-support line yields, and the concrete of the two sides of the web shearing diagonal crack incurs obvious diastrophism, the composite component failures and presents shear compression failure; the diagonal crack developes from the end of the shear connector to the support; horizontal crack  incurs in the combined interface from the end of the component to the point of loading point; the effect of the shear span ratio on shear bearing capacity is significant, and the effect of the stirrup spacing to  shear bearing capacity with shear compression failure, diagonal tension failure is more obvious than that of specimen with diagonal compression failure.

Keywords:beam-slab composite component; shear connector; shear behavior; experimental study

 

*国家自然科学基金资助项目(51578478,51508495)。

 

通讯作者:曹大富,硕士,教授,硕士生导师,Email:dfcao@yzu.edu.cn。

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