Numerical and theoretical research on flexural behaviour of steel-precast UHPC composite beams

被引：10

作者：

Ge, Wenjie ^{[1
,2
]}

Liu, Chi ^{[1
]}

Zhang, Zhiwen ^{[1
]}

Guan, Zhongwei ^{[3
]}

Ashour, Ashraf ^{[4
]}

Song, Shoutan ^{[5
]}

Jiang, Hongbo ^{[1
]}

Sun, Chuanzhi ^{[2
]}

Qiu, Linfeng ^{[6
]}

Yao, Shan ^{[7
]}

Yan, Weihua ^{[1
]}

Cao, Dafu ^{[1
]}

机构：

[1] Yangzhou Univ, Coll Civil Sci & Engn, Yangzhou 225127, Peoples R China

[2] Jiangsu Prov Engn Res Ctr Prefabricated Bldg & Int, Suqian 223800, Peoples R China

[3] Univ Liverpool, Sch Engn, Liverpool L693GQ, England

[4] Univ Bradford, Sch Engn, Bradford BD71DP, England

[5] Southeast Univ, Coll Civil Engn, Nanjing 225009, Peoples R China

[6] Nantong Construction Qual & Supervis Stn, Nantong 226000, Peoples R China

[7] Gansu Engn Design & Res Inst Co LTD, Lanzhou 730030, Peoples R China

来源：

CASE STUDIES IN CONSTRUCTION MATERIALS | 2023年 / 18卷

关键词：

Flexural performance; Composite beam; Ultra-high performance concrete; Section steel; Bearing capacity; PERFORMANCE;

D O I：

10.1016/j.cscm.2022.e01789

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

In order to promote the utilization of high strength materials and application of prefabricated structures, flexural behaviour of section steel-precast UHPC (Ultra-High performance concrete) slab composite beams prefabricated with bolt shear connectors are numerically simulated by the finite element (FE) software ABAQUS. The model is verified by three prefabricated steel-concrete composite beams tested. Numerical analysis results are in good accordance with experimental results. Furthermore, parametric studies are conducted to investigate the effects of strength of section steel and concrete of precast slab, thickness of section steel, width and height of precast concrete slab, diameters of steel bars and bolt shear connectors. The flexural behaviour of composite beams, in terms of bearing capacity, deflection, ductility and energy dissipation, are compared. The numerical results indicate that the improvement of strength of section steel results in a decrease of ductility, but a significant increase of the ultimate load and energy dissipation. Compared with composite beam made of section steel with thickness of 10 mm, the ultimate load of beams made of section steel with thickness of 14 and 18 mm improve by 29.0% and 58.8%, respectively, the ductility enhance by 2.8% and 8.3%, respectively, and the energy dissipation improve by 8.0% and 12.3%, respectively. With the increase of concrete strength, the ultimate load, deflection and energy dissipation gradually increase. The ductility of steel-UHPC composite beam is the highest, that of steel-HSC composite beam is the lowest. The effect of reinforcement ratio of concrete slab and diameter of shear bolts on the ultimate load of composite beam is limited. Simplified formulae for two different sectional types of proper-reinforced section steel precast UHPC slab composite beams occurred bending failure are proposed, and the predicted results fit well with the simulated results. The results can be taken as a reference for the design and construction of section steel-precast UHPC slab composite beams.

引用

页数：20

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