Cracking stiffness of assembled monolithic steel-prestressed concrete composite beam in negative moment

被引：0
|
作者：
Yu J. [1 ,2 ]
Wang Y. [1 ,2 ]
Liu J. [1 ,2 ]
Zhou B. [1 ,2 ]
机构：
[1] School of Civil Engineering, Chongqing University, Chongqing
[2] Key Laboratory of New Technology for Construction of Cities in Mountain Area (Chongqing University), Ministry of Education, Chongqing
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2019年 / 40卷
关键词：
Assembled monolithic; Bending stiffness; Negative bending moment region; Static load test; Steel-concrete composite beam; Tensile stiffness effect;
D O I：
10.14006/j.jzjgxb.2019.S1.042
中图分类号：
学科分类号：
摘要：
In order to quantify the decrease of bending stiffness of the beam section in the negative bending moment region of continuous composite beams when the concrete deck cracks and gradually quiting its work,static load tests were carried out on four assembled monolithic steel-prestressed concrete composite beams, two assembled monolithic steel-concrete composite beams and two steel-cast-in-place prestressed concrete composite beams. The test results of stiffness were compared with calculated value of reduced rigidity method and 'Building code requirements for reinforced concrete and commentary'. Comparing the calculated values for assembled monolithic steel-prestressed concrete composite beam and steel-cast-in-place-prestressed concrete composite beam, it can be found that the cracking degree of concrete under normal service load is reduced and the influence of cracking on its stiffness is not obvious due to the existence of the prestressed improve the cracking load of specimens. The calculated value of reduced stiffness only considering interface slippage effect before crack agrees well with the test results. For assembled monolithic steel-concrete composite beams, the calculated values of the stiffness taking into account tensile stiffness effect and slippage effect of concrete in 'Building code requirements for reinforced concrete and commentary' are in good agreement with the test results. © 2019, Editorial Office of Journal of Building Structures. All right reserved.
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页码：316 / 324
页数：8
相关论文
共 23 条
  • [1] NEWMARK N M, SIESS C, VIEST I M., Tests and analysis of composite beams with incomplete interaction [J], Experimental Stress Analysis, 9, 1, pp. 75-92, (1951)
  • [2] ALLISON R W., Cracking and tension field action in composite beams, pp. 12-24, (1980)
  • [3] JOHNSON R P., Composite structure of steel and concrete, (1994)
  • [4] NIE Jianguo, SHEN Jumin, YU Zhiwu, A reduced rigidity method for calculating deformation of composite steel-concrete beams, China Civil Engineering Journal, 28, 6, pp. 11-17, (1995)
  • [5] NIE Jianguo, FAN Jiansheng, Analysis of composite beams under negative bending moment, Engineering Mechanics, 19, 4, pp. 33-36, (2002)
  • [6] TONG Genshu, Design methods of steel structures, pp. 172-175, (2007)
  • [7] RANZI G, ZONA A., A steel-concrete composite beam model with partial interaction including the shear deformability of the steel component, Engineering Structures, 29, 11, pp. 3026-3041, (2007)
  • [8] ZHOU An, Flexural stiffness of steel-prestressed concrete composite beam, Key Engineering Materials, 400, pp. 843-848, (2008)
  • [9] SUN Qili, YANG Yue, FAN Jiansheng, Et al., Effect of longitudinal reinforcement and prestressing on stiffness of composite beams under hogging moments, Journal of Constructional Steel Research, 100, pp. 1-11, (2014)
  • [10] WANG Shenhao, TONG Genshu, ZHANG Lei, Reduced stiffness of composite beams considering slip and shear deformation of steel, Journal of Constructional Steel Research, 131, pp. 19-29, (2017)
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