Mechanical Behavior of Composite Shell Lining Structures Based on Cohesion Models

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-08-03 DOI:10.1007/s12205-024-0470-4

Xianda Feng, Yingrui Lu, Bin Lu, Chao Yuan, Shuchen Li

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Abstract

With the development of tunnel construction, the number of composite-lined tunnels with spray membrane waterproofing is gradually increasing. To clarify the mechanical properties of composite shell lining (CSL) structures, mechanical parameters of interlayer waterproofing membrane materials were determined by conducting uniaxial tensile, interlayer bond tensile, and interlayer bond shear tests on waterproofing membrane materials with different water-cement ratios. The cohesion model is used to simulate the bonding characteristics between waterproofing membranes and concrete to develop numerical simulation calculation models of CSL and double shell lining (DSL) structures. The results of indoor tests and numerical simulations confirmed the feasibility of using a cohesion model to characterize the interlayer shear mechanical properties of the waterproofing membrane. Relative to the DSL, the stresses of the primary support of CSL and key cross-sections of the secondary lining are more similar owing to the synergistic force between the primary support and secondary lining caused by the bonding characteristics of the waterproofing membrane, resulting in the formation of a type of composite load-bearing structure, which improves the utilization rate of the primary support and reduces the thickness of the secondary lining. Therefore, the CSL structure based on spray membrane waterproofing has broad application prospects.

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基于内聚力模型的复合材料壳衬结构的力学行为

随着隧道建设的发展，喷膜防水的复合衬砌隧道逐渐增多。为明确复合材料壳体衬砌（CSL）结构的力学性能，通过对不同水灰比的防水卷材进行单轴拉伸、层间粘结拉伸和层间粘结剪切试验，确定了层间防水卷材的力学参数。内聚力模型用于模拟防水卷材与混凝土之间的粘结特性，以开发 CSL 和双壳衬砌（DSL）结构的数值模拟计算模型。室内试验和数值模拟的结果证实了使用内聚力模型来描述防水卷材层间剪切机械特性的可行性。相对于双层防水卷材，CSL 的主支撑和二次衬砌的关键截面的应力更为接近，这是因为防水卷材的粘结特性使主支撑和二次衬砌之间产生了协同作用力，从而形成了一种复合承重结构，提高了主支撑的利用率，减少了二次衬砌的厚度。因此，基于喷膜防水的 CSL 结构具有广阔的应用前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.