支架和绑定模型用于预测在地震负荷下内部RC梁柱接头的剪切行为
Wentong Zhao1, Yulin Yan2, Yaxin Yue3
1School of Civil and Environment Engineering, Zhengzhou University of Aeronautics, Zhengzhou, 450046, China. wentong21@zua.edu.cn.
Scientific reports
|December 15, 2025
概括
本研究介绍了一种用于钢筋混凝土 (RC) 梁柱连接的新型支架和带模型 (STM). 拟议的STM准确地预测了关节剪切应力-应变行为,改善了RC结构的地震分析.
科学领域:
- 结构工程 结构工程
- 地震工程的工程是地震工程.
- 材料科学 材料科学 材料科学
背景情况:
- 梁柱接头是钢筋混凝土 (RC) 结构中的关键部件,在地震负荷下表现出复杂的机械行为.
- 精确建模关节剪切应力-张力关系对于可靠的有限元分析 (FEA) 对于RC结构的地震性能至关重要.
研究的目的:
- 开发和验证一个创新的支架和绑定模型 (STM) 用于预测内部RC梁-柱接头的剪切应力-拉伸关系.
- 通过将其预测与实验数据和现有模型进行比较,评估拟议的STM的准确性和有效性.
主要方法:
- 在循环负荷下测试了六个内部RC梁-柱接头样本,以观察剪切变形和故障模式.
- 基于对变形特征和裂纹模式的实验观测,制定了一个新的STM.
- 通过对23个RC内部梁柱连接的已发表的实验结果验证了STM的预测,并与阳模型进行了比较.
- 通过使用OpenSees软件将STM集成到FEA中,以分析负载位移歇斯底里和关节剪切变形.
主要成果:
- 与现有模型相比,拟议的STM显示出与实验性关节剪切应力和应变外曲线的更密切一致.
- 与阳模型相比,STM显著降低了峰值剪压的平均绝对误差 (MAE),并增加了确定系数 (R2).
- 使用STM的FEA结果准确地复制了实验负载位移歇斯底里曲线和关节剪切变形,证实了其适用性.
结论:
- 开发的STM提供了一个非常准确的预测,切割应力-张力关系的RC梁-柱接头.
- 拟议的STM通过改进FEA中联合核心行为的建模来增强RC结构的地震分析.
- 该研究验证了STM在结构工程模拟中的实际适用性和有效性.
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