关于在全截面间隔造浸泡管中造后皮带的约束效应的研究
Bang-Yan Liang1, Wen-Huo Sun1, Yong-Hui Huang2
1The Second Engineering Company of CCCC Fourth Harbor Engineering Co., Ltd., Guangzhou 510230, China.
Materials (Basel, Switzerland)
|October 29, 2025
概括
道段中的后造带通过管理收缩应变来减少裂纹. 最佳的皮带长度对于控制混凝土结构中的制效应和拉伸应力至关重要.
科学领域:
- 土木工程 土木工程是指土木工程.
- 材料科学 材料科学 材料科学
背景情况:
- 北浸泡道采用全截面间隔造工艺,使用后造带.
- 这些皮带在混凝土段上产生约束效应,可能导致裂.
研究的目的:
- 调查后造带中底部钢板和钢条对细分机械行为的影响.
- 在全截面造段中减轻混凝土裂.
- 提出对造后皮带长度的要求.
主要方法:
- 实地测试和数值模拟的比较分析.
- 开发一个温度依赖的混凝土热膨胀系数模型.
- 根据不同的造后腰带长度评估制效应.
主要成果:
- 在限制条件下,分段收缩应变达到了348 με,其中水化热和干燥收缩是主要的贡献者.
- 随着造后皮带长度的增加,束效应会减少.
- 在1.6米的皮带长度下,约束感应的拉力应力为1.4MPa,钢板和钢条分别贡献了70%和30%.
结论:
- 造后的皮带长度是影响制效应和拉伸应力的一个关键因素.
- 皮带长度,应力和束系数之间的确定的关系提供了工程指导.
- 这些发现支持沉浸道段的高质量预制.
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