在相互负荷下对预应力交叉层木混凝土复合结构的侧面阻力性能进行研究
Yong Xu1, Xin Huang1, Yingda Zhang1
1School of Architecture and Civil Engineering, Xihua University, Chengdu 610039, China.
Materials (Basel, Switzerland)
|June 19, 2024
概括
预应力交叉层木材 (CLT) 和混凝土复合结构显示增加了承载能力和产量位移. 较高的预应力提高了性能,但可能会降低柔性,为改进的结构系统提供了设计见解.
科学领域:
- 结构工程 结构工程
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
背景情况:
- 交叉层木材 (CLT) 和混凝土复合结构协同整合材料强度.
- CLT提供轻量化设计和抗曲性;混凝土提供压力强度和耐用性.
- 本研究的重点是预应力CLT混凝土复合材料剪墙的机械性能.
研究的目的:
- 在不同预应力下研究全尺寸CLT混凝土复合材料切壁的机械性能.
- 评估初始预应力对结构行为,负载能力和故障模式的影响.
- 为了比较预应力CLT混凝土结构与预应力CLT钢复合材料的性能.
主要方法:
- 在三个全尺寸的CLT切壁样本上进行了近静态反转负荷测试.
- 使用ABAQUS进行有限元分析 (FEA) 来创建精细的结构模型.
- 在实验设置中变化的初始预应力和CLT面板尺寸.
主要成果:
- 预应力CLT混凝土结构显示出增加的承载负载,承载位移和最大承载能力 (高达39.8%).
- 较高的预应力减少了对钢节点的依赖,但在降低性时适度增强了刚性.
- 故障归因于预应力钢丝和板的局部压力故障.
- 在最大承载能力方面,预应力CLT混凝土结构的性能优于预应力CLT钢复合材料.
结论:
- 初始预应力是一种可行的方法,可以提高CLT混凝土复合结构的承载能力.
- 设计考虑必须平衡增加预应力的好处与潜在的柔性降低.
- 这些发现支持为这些创新的复合系统制定先进的结构设计建议.
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