焊钉群-胶结混合连接的钢-混凝土组合梁试验

宓竹锟; 赵伟; 王万祯

doi:10.13204/j.gyjzG22041708

焊钉群-胶结混合连接的钢-混凝土组合梁试验

doi: 10.13204/j.gyjzG22041708

1. 宁波大学土木与环境工程学院, 浙江宁波 315211;
2. 浙江交通职业技术学院钢桥中心, 杭州 311112

基金项目:

浙江省基础公益研究计划项目（LGG21E080001）；浙江省交通运输厅计划项目（2021008）。

详细信息

作者简介:
宓竹锟,男,1999年出生,硕士研究生。

通讯作者:
赵伟,zhaowei7811@126.com。

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- 被引次数: 0
出版历程
- 收稿日期: 2022-04-17
- 网络出版日期: 2022-10-28

Test of Steel-Concrete Composite Girder with Stud-Epoxy Mortar Hybrid Connectors

1. School of Civil and Environmental Engineering, Ningbo University, Ningbo 315211, China;
2. Center of Steel Bridge, Zhejiang Institute of Communications, Hangzhou 311112, China

摘要

摘要: 对6根焊钉群-环氧砂浆混合连接的钢-混凝土组合梁试件进行了静力加载试验，考察了焊钉群间距对组合梁受力性能的影响，获得了组合梁承载力、界面滑移特征、混合抗剪连接件的剪力分配次序和焊钉的应变演化。结果表明：1）弹性阶段，环氧砂浆胶结层承担混凝土板和钢梁界面的主要剪力；2）弹塑性阶段，焊钉承担界面主要剪力；3）破坏阶段，加载点及跨中位置混凝土板和钢梁界面滑移未超过2 mm，组合梁的剩余抗弯承载力在60%以上，混凝土板与钢梁的组合效果良好，组合梁具有良好的延性；4）当焊钉群间距由700 mm缩小至525 mm再缩小至420 mm时，组合梁的极限荷载和耗能能力分别提升3.4%、41.9%和4.1%、2.5%。最后采用塑性理论，提出了混合连接的钢-混凝土组合梁抗弯承载力计算式。
- 装配式钢-混凝土组合梁 /
- 剪力分配 /
- 试验研究 /
- 焊钉群间距 /
- 抗弯性能
Abstract: The static loading test was carried out on six full-scale steel-concrete composite girders with stud-epoxy mortar hybrid connectors. The effect of the spacing between stud groups on the mechanical properties of composite girders was considered. The bearing capacity and the interface slip characteristics, as well as the shear force distribution sequence and the strain evolution of the bolts were analyzed and summarized. The results indicated that the epoxy mortar bonding layer bore the main shear force in the elastic stage. After entering the elastic-plastic stage, the stud began to bear the main shear force; in the failure stage, the interface sliding shift between the precast concrete and the steel beam should not exceed 2 mm at the loading point and middle position of the composite girders, indicating that there was a good cooperative work between the precast concrete slab and the steel beam. The residual flexural bearing capacity of composite girder was still more than 60%, which indicated that it had good ductility.When the spacing between the stud groups was reduced from 700 mm to 525 mm and 525 mm to 420 mm, the ultimate bearing capacity and the total energy consumption increased by 3.4% and 41.9%, 4.1% and 2.5%, respectively. Finally, based on the plastic theory, a formula for calculating the flexural bearing capacity of steel-concrete composite beams with hybrid connections was proposed.
- prefabricated steel-concrete composite girder /
- shear distribution /
- experimental study /
- spacing of stud groups /
- flexural behavior

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