局部后张预应力装配式混凝土框架梁柱节点抗震性能数值分析

吴俊霖; 杨辉; 郭正兴

doi:10.13204/j.gyjzG22081301

局部后张预应力装配式混凝土框架梁柱节点抗震性能数值分析

doi: 10.13204/j.gyjzG22081301

吴俊霖¹,
杨辉^1,3, ,,
郭正兴²

1. 江苏科技大学土木工程与建筑学院, 江苏镇江 212003;
2. 东南大学土木工程学院, 南京 210096;
3. 中亿丰建设集团股份有限公司, 江苏苏州 215021

基金项目:

2021年江苏省产学研合作项目(BY2021115)。

十三五国家重点研发计划专项资助项目(2016YFC0701703)

详细信息

作者简介:
吴俊霖,男,1999年出生,硕士研究生。

通讯作者:
杨辉,男,1982年出生,博士,高级工程师,93897202@qq.com。

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- 文章访问数: 49
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- 被引次数: 0
出版历程
- 收稿日期: 2022-08-13

Numerical Analysis of Seismic Performance of Local Post-Tensioned Prestressed Assembled Concrete Frame Beam-Column Joints

WU Junlin¹,
YANG Hui^{1,3
, ,},
GUO Zhengxing²

1. School of Civil Engineering and Architecture, Jiangsu University of Science and Technology, Zhenjiang 212003, China;
2. School of Civil Engineering, Southeast University, Nanjing 210096, China;
3. Zhongyifeng Construction Group Co., Ltd., Suzhou 215021, China

摘要

摘要: 为了研究新型干湿混合式局部后张预应力装配式混凝土框架节点的抗震性能,采用ABAQUS软件对两种不同预应力筋形式的节点构件,即预应力筋为钢拉杆或高强钢筋,建立实体有限元模型进行数值模拟分析,并通过试验结果进行验证,最后对混凝土强度等级、预应力筋张拉力、轴压比等相关因素进行了参数分析。研究结果表明:考虑钢筋滑移的有限元模型模拟结果与试验结果基本吻合,钢拉杆节点的累计耗能约为高强钢筋节点的41%;混凝土强度由C30提高到C50时,两种节点的承载能力提高均不到5%;相比于高强钢筋节点,预应力筋张拉力的增加能够明显减小钢拉杆节点的屈服位移,提高其前期刚度、延性;在轴压比0.6内,轴压比的增大仅对高强钢筋节点的极限承载力有所提高。
- 梁柱节点 /
- 装配式结构 /
- 后张预应力 /
- 有限元分析 /
- 抗震性能
Abstract: In order to study the seismic performance of the new dry-wet combined precast concrete beam-column joints with local post-tensioned tendons,a solid finite element model was established by ABAQUS software to simulate the joints with high strength steel reinforcement and steel ties for prestressing tendons,and to verify with the experimental results. Finally, parametric analysis was carried out on the relevant factors such as concrete strength grade, prestressing tendon tension and axial compression ratio. The results of the study show that the simulation results of the finite element model considering the slip of the reinforcement are in general agreement with the tests. The cumulative energy consumption of the joints with steel ties is about 41% of that of the joints with high-strength steel. When the concrete strength is increased from C30 to C50, the load carrying capacity of both joints increases by less than 5%. Compared with joints with high-strength steel, the increase of the prestressing tendons tension can significantly reduce the yield displacement of the joints with steel ties and improve its pre-strength, stiffness and ductility.Within the axial pressure ratio of 0.6, the increase of the axial pressure ratio only improve the ultimate load capacity of the joints with high-strength steel.
- beam-to-column joints /
- assembled structures /
- post-tensioned prestressing /
- finite element analysis /
- seismic performance

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