基于钎焊残余应力的不锈钢芯板楼板性能研究

舒兴平; 李珂; 黄毅恒

doi:10.13204/j.gyjzG22011606

基于钎焊残余应力的不锈钢芯板楼板性能研究

doi: 10.13204/j.gyjzG22011606

1. 湖南大学土木工程学院, 长沙 410082;
2. 南宁市建筑规划设计集团有限公司, 南宁 530026

基金项目:

国家自然科学基金项目(51778219)。

详细信息

作者简介:
舒兴平,男,1962年出生,博士,教授,博士生导师。电子信箱:hnlget@163.com

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出版历程
- 收稿日期: 2022-01-16

Study on the Performance of Stainless Steel Core Plate Floor Based on Brazing Residual Stress

1. School of Civil Engineering, Hunan University, Changsha 410082, China;
2. Nanning Architectural and Planning Design Group Co., Ltd., Nanning 530026, China

摘要

摘要: 为研究考虑钎焊残余应力分布的不锈钢芯板楼板的受力性能,拟采用钻孔法和X射线衍射法对25个芯板单管试件进行钎焊残余应力测定,提出不锈钢芯板钎焊残余应力的建议简化分布模型。简化分布模型将初始缺陷引入到不锈钢芯板楼板三点弯曲试验的有限元模型中,对比考虑钎焊残余应力分布和无钎焊残余应力分布有限元模型的计算结果与芯板楼板试验结果来验证简化分布模型的可靠性,并对其有限元模型进行参数化分析。试验与研究结果表明:简化分布模型的拉应力峰值建议值为0.6σ_0.2;考虑钎焊残余应力分布的有限元模型能够更准确地模拟芯板楼板受跨中集中荷载情况下的力学性能;考虑钎焊残余应力分布的有限元模型的计算剪切刚度更加准确。
- 不锈钢芯板 /
- 钎焊残余应力 /
- 简化分布模型 /
- 三点弯曲试验 /
- 弯曲刚度 /
- 剪切刚度
Abstract: In order to study the bearing performance of stainless steel core plate (SSCP) floor considering brazing residual stress (BRS) distribution, the BRS in 25 single-unit specimens of SSCP were determined by hole-drilling method and X-ray diffraction method, and the simplified predictive model for the BRS distributions in SSCP was proposed. The proposed simplified model, as the initial defect, was introduced into the finite element model (FEM) of the three-point bending test of the SSCP floor, and the reliability of the simplified distribution model is verified by comparing the calculation results of the FEM considering the BRS distribution and without BRS distribution with the test results of the SSCP floor, and the FEM was parametrically analyzed. The test and research results show that the recommended peak value of tensile BRS for the simplified predictive model is 0.6σ_0.2. The FEM considering the BRS distribution is able to accurately simulate the bearing performance of the SSCP floor. Calculated shear stiffness of the FEM considering BRS distribution is more accurate.
- stainless steel core plate /
- brazing residual stress /
- simplified distribution model /
- three-point bending test /
- bending stiffness /
- shear stiffness

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参考文献(12)

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