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A numerical framework for underground structures in layered ground under inclined P-SV waves using stiffness

《结构与土木工程前沿（英文）》 2023年第17卷第1期页码 10-24 doi: 10.1007/s11709-022-0904-3

摘要： A numerical framework was proposed for the seismic analysis of underground structures in layered ground under inclined P-SV waves. The free-field responses are first obtained using the stiffness matrix method based on plane-wave assumptions. Then, the domain reduction method was employed to reproduce the wavefield in the numerical model of the soil–structure system. The proposed numerical framework was verified by providing comparisons with analytical solutions for cases involving free-field responses of homogeneous ground, layered ground, and pressure-dependent heterogeneous ground, as well as for an example of a soil–structure interaction simulation. Compared with the viscous and viscous-spring boundary methods adopted in previous studies, the proposed framework exhibits the advantage of incorporating oblique incident waves in a nonlinear heterogeneous ground. Numerical results show that SV-waves are more destructive to underground structures than P-waves, and the responses of underground structures are significantly affected by the incident angles.

关键词： underground structures seismic response stiffness matrix method domain reduction method P-SV waves

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An end-to-end 3d seismic simulation of underground structures due to point dislocation source by using

Zhenning BA; Jisai FU; Zhihui ZHU; Hao ZHONG

《结构与土木工程前沿（英文）》 2022年第16卷第12期页码 1515-1529 doi: 10.1007/s11709-022-0887-0

摘要： Based on the domain reduction idea and artificial boundary substructure method, this paper proposes an FK-FEM hybrid approach by integrating the advantages of FK and FEM (i.e., FK can efficiently generate high-frequency three translational motion, while FEM has rich elements types and constitutive models). An advantage of this approach is that it realizes the entire process simulation from point dislocation source to underground structure. Compared with the plane wave field input method, the FK-FEM hybrid approach can reflect the spatial variability of seismic motion and the influence of source and propagation path. This approach can provide an effective solution for seismic analysis of underground structures under scenario of earthquake in regions where strong earthquakes may occur but are not recorded, especially when active faults, crustal, and soil parameters are available. Taking Daikai subway station as an example, the seismic response of the underground structure is simulated after verifying the correctness of the approach and the effects of crustal velocity structure and source parameters on the seismic response of Daikai station are discussed. In this example, the influence of velocity structure on the maximum interlayer displacement angle of underground structure is 96.5% and the change of source parameters can lead to the change of structural failure direction.

关键词： source-to-structure simulation FK-FEM hybrid approach underground structures point dislocation source

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Effect of strata restraint on seismic performance of prefabricated sidewall joints in fabricated subway stations

《结构与土木工程前沿（英文）》 2023年第17卷第5期页码 763-779 doi: 10.1007/s11709-023-0917-6

摘要： A disadvantage of the conventional quasi-static test method is that it does not consider the soil restraint effect. A new method to test the seismic performance of prefabricated specimens for underground assembled structures is proposed, which can realistically reflect the strata restraint effect on the underground structure. Laboratory work combined with finite element (FE) analysis is performed in this study. Three full-scale sidewall specimens with different joint forms are designed and fabricated. Indices related to the seismic performance and damage modes are analyzed comprehensively to reveal the mechanism of the strata restraint effect on the prefabricated sidewall components. Test results show that the strata restraint effect effectively improves the energy dissipation capacity, load-bearing capacity, and the recoverability of the internal deformation of the precast sidewall components. However, the strata restraint effect reduces the ductility of the precast sidewall components and aggravates the shear and bending deformations in the core region of the connection joints. Additionally, the strata restraint effect significantly affects the seismic performance and damage mode of the prefabricated sidewall components. An FE model that can be used to conduct a seismic performance study of prefabricated specimens for underground assembled structures is proposed, and its feasibility is verified via comparison with test data.

关键词： underground structures precast sidewall specimen seismic test method bearing capacity energy dissipation capacity plastic deformation

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明挖法地下装配式结构接缝防水技术探讨

黄明利,杨泽,谭忠盛,王文正

《中国工程科学》 2017年第19卷第6期页码 131-139 doi: 10.15302/J-SSCAE-2017.06.019

摘要：

装配式结构与传统的现浇结构相比具有节能、环保、节省模具、工期较短等特点，已在地上建筑中获得了飞速发展。由于地下环境复杂，地下装配式结构接头部位的防水处理成为难题，因此，地下装配式结构近几年在我国才刚刚起步。本文在分析地下装配式结构的接头形式和防水技术现状的基础上，提出了应用环氧灌浆料对预制装配式结构接头进行灌封，通过试验研究了环氧灌浆料本身及其黏接混凝土的力学性能。同时还针对明挖法修建的技术特点，介绍了基坑肥槽预拌固化土回填技术，阐述了预拌固化土对地下工程结构防水的作用，研究成果可供类似工程参考。

关键词：预制装配式结构地下结构接缝环氧灌浆料预拌固化土防水技术

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地下工程抗爆防震塌设计动力学机理讨论

杨黎明,周风华,董新龙,王礼立

《中国工程科学》 2011年第13卷第3期页码 29-37

摘要：

在爆炸载荷下，反射拉应力波是导致混凝土防护结构震塌的主要原因。材料的动态抗拉强度是结构抗爆防震塌设计所必须考虑的主要参量，抑制或减弱拉伸冲击波的强度是防护结构设计的一个重要目标。研究了混凝土和钢纤维增强混凝土的动态力学性能以及它们结构的爆炸震塌响应。试验表明，高强混凝土C100的抗震塌能力还不如普通混凝土C40；加入体积含量2 %的钢纤维可有效提高混凝土的强度以及结构的抗震塌能力；而且加入相同含量的钢纤维后，纤维增强C100混凝土的抗震塌能力与增强C40混凝土相比并无明显不同。应用一维应力波理论近似分析，揭示了抗震塌设计的动力学机理，分析表明，“三明治”复合层结构可以有效提高结构的抗震塌能力，此分析为设计具有更好抗爆能力的防护工程提供了科学依据。

关键词：地下工程结构混凝土拉伸性能抗震塌应力波

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基于多声源波速结构成像的岩体异常区域超前辨识方法 Article

董陇军, 裴重伟, 谢鑫, 张义涵, 闫先航

《工程（英文）》 2023年第22卷第3期页码 191-200 doi: 10.1016/j.eng.2022.05.016

摘要：

异常区域超前辨识对于预防地下岩土工程灾害具有重要作用。为了满足地下工程高精度探测的需求，本文提出一种层析成像方法以辨识复杂岩体结构中的异常区域，结合了走时层析、阻尼最小二乘法和高斯滤波等技术。该方法克服了空洞区域辨识中速度差限制，减轻了迭代中孤立速度突变所带来的影响。开展了数值和室内实验，量化评估最短路径法（shortest-path method, SPM）、动态最短路径法（dynamic shortest-path method, DSPM）和快速扫描法（fast sweeping method, FSM）等正演模拟的识别精度和计算效率。结果表明，在数值和室内实验中DSPM和FSM均能清晰地辨识出异常区域。陕西震奥矿山现场应用结果证明了该方法可利用矿山开采中爆破、微震等多类声源对矿山内部未知结构进行波速场成像。本研究不仅实现了走时层析成像方法在异常区域识别中的应用，而且为地下岩土工程中潜在风险源的探测提供了新的思路。

关键词：地下工程走时层析复杂结构异常区域辨识射线追踪

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Application and development of modern long-span space structures in China

Shilin DONG, Yang ZHAO, Dong XING

《结构与土木工程前沿（英文）》 2012年第6卷第3期页码 224-239 doi: 10.1007/s11709-012-0166-6

摘要： Modern long-span space structures, developed during the 1970s and 1980s, are light and effective structures based on new technologies and light-weight high-strength materials, such as membranes and steel cables. These structures include air-supported membrane structures, cable-membrane structures, cable truss structures, beam string structures, suspen-domes, cable domes, composite structures of cable dome and single-layer lattice shell, Tensairity structures and so forth. For the premodern space structures widely used since the mid-twentieth century (such as thin shells, space trusses, lattice shells and ordinary cable structures), new space structures have been developed by the combination of different structural forms and materials. The application of prestressing technology and the innovation of structural concepts and configurations are also associated with modern space structures, including composite space trusses, open-web grid structures, polyhedron space frame structures, partial double-layer lattice shells, cable-stayed grid structures, tree-type structures, prestressed segmental steel structures and so forth. This paper provides a review of the structural characteristics and practical applications in China of modern rigid space structures, modern flexible space structures and modern rigid-flexible combined space structures.

关键词： modern long-span space structures rigid space structures flexible space structures rigid-flexible combined space structures application and development

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Hydrogen Storage Performance During Underground Hydrogen Storage in Depleted Gas Reservoirs: A Review

Lingping Zeng,Regina Sander,Yongqiang Chen,Quan Xie,

《工程（英文）》 doi: 10.1016/j.eng.2024.03.011

摘要： Hydrogen has emerged as a promising alternative to meet the growing demand for sustainable and renewable energy sources. Underground hydrogen storage (UHS) in depleted gas reservoirs holds significant potential for large-scale energy storage and the seamless integration of intermittent renewable energy sources, due to its capacity to address challenges associated with the intermittent nature of renewable energy sources, ensuring a steady and reliable energy supply. Leveraging the existing infrastructure and well-characterized geological formations, depleted gas reservoirs offer an attractive option for large-scale hydrogen storage implementation. However, significant knowledge gaps regarding storage performance hinder the commercialization of UHS operation. Hydrogen deliverability, hydrogen trapping, and the equation of state are key areas with limited understanding. This literature review critically analyzes and synthesizes existing research on hydrogen storage performance during underground storage in depleted gas reservoirs; it then provides a high-level risk assessment and an overview of the techno-economics of UHS. The significance of this review lies in its consolidation of current knowledge, highlighting unresolved issues and proposing areas for future research. Addressing these gaps will advance hydrogen-based energy systems and support the transition to a sustainable energy landscape. Facilitating efficient and safe deployment of UHS in depleted gas reservoirs will assist in unlocking hydrogen’s full potential as a clean and renewable energy carrier. In addition, this review aids policymakers and the scientific community in making informed decisions regarding hydrogen storage technologies.

关键词： Underground hydrogen storage Storage performance Hydrogen deliverability Hydrogen trapping Risk assessment Techno-economic analysis

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Prediction of characteristic blast-induced vibration frequency during underground excavation by using

Tae Un PAK; Guk Rae JO; Un Chol HAN

《结构与土木工程前沿（英文）》 2022年第16卷第8期页码 1029-1039 doi: 10.1007/s11709-022-0861-x

摘要： Blast-induced vibration produces a very complex signal, and it is very important to work out environmental problems induced by blasting. In this study, blasting vibration signals were measured during underground excavation in carbonaceous shale by using vibration pickup CB-30 and FFT analyzer AD-3523. Then, wavelet analysis on the measured results was carried out to identify frequency bands reflecting changes of blasting vibration parameters such as vibration velocity and energy in different frequency bands. Frequency characteristics are then discussed in view of blast source distance and charge weight per delay. From analysis of results, it can be found that peak velocity and energy of blasting vibration in frequency band of 62.5–125 Hz were larger than ones in other bands, indicating the similarity to characteristics in the distribution band (31–130 Hz) of main vibration frequency. Most frequency bands were affected by blasting source distance, and the frequency band of 0–62.5 Hz reflected the change of charge weight per delay. By presenting a simplified method to predict main vibration frequency, this research may provide significant reference for future blasting engineering.

关键词： wavelet analysis blast-induced vibration frequency characteristics underground excavation

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Practical optimization of deployable and scissor-like structures using a fast GA method

M. SALAR, M. R. GHASEMI, B. DIZANGIAN

《结构与土木工程前沿（英文）》 2019年第13卷第3期页码 557-568 doi: 10.1007/s11709-018-0497-z

摘要： This paper addresses practical sizing optimization of deployable and scissor-like structures from a new point of view. These structures have been recently highly regarded for beauty, lightweight, determine behavior, proper performance against lateral loads and the ability of been compactly packaged. At this time, there is a few studies done considering practical optimization of these structures. Loading considered here includes wind and gravity loads. In foldable scissor-like structures, connections have a complex behavior. For this reason, in this study, the authors used the ABAQUS commercial package as an analyzer in the optimization procedure. This made the obtained optimal solutions highly reliable from the point of view of applicability and construction requirements. Also, to do optimization task, a fast genetic algorithm method, which has been recently introduced by authors, was utilized. Optimization results show that despite less weight for aluminum models than steel models, aluminum deployable structures are not affordable because they need more material than steel structures and cause more environmental damage.

关键词： optimization scissor-like structures deployable structures genetic algorithm ABAQUS

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Development and utilization of underground space for the protection of relics in the Yang Emperor Mausoleum

CHEN Zhilong, ZHANG Ping, LI Juxi

《结构与土木工程前沿（英文）》 2007年第1卷第2期页码 229-233 doi: 10.1007/s11709-007-0028-9

摘要： By analyzing the ten burials that have been unearthed at the Yang Emperor Mausoleum of the Han Dynasty, and China s first wholly underground protection and exhibition hall of relics that is under construction, the article expounds the importance of relic site protection through underground space. In particular, it discusses the preservation of historical and cultural relics, the harmonious relationship between architecture and nature, and the collection and security of cultural relics.

关键词： importance architecture preservation harmonious relationship construction

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海洋结构：未来趋势和高校的角色 Perspective

Preben Terndrup Pedersen

《工程（英文）》 2015年第1卷第1期页码 131-138 doi: 10.15302/J-ENG-2015004

摘要：

本文强调未来海洋结构发展的挑战和趋势，集中讨论了提高耗能船舶效率的途径及近海油气生产设施设计面临的挑战，也讨论了未来船舶和海洋结构可持续设计所最需的分析工具，最后是对大学在海洋结构领域的教育、研究和创新中应有作用的思考，并讨论了海洋科技教育、基础研究活动和国际合作等方面的课程要求。

关键词：海洋结构船舶海工设施课程研究活动

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Reliability-based design optimization of offshore wind turbine support structures using RBF surrogate

《结构与土木工程前沿（英文）》 2023年第17卷第7期页码 1086-1099 doi: 10.1007/s11709-023-0976-8

摘要： Reliability-based design optimization of offshore wind turbine support structures using RBF surrogate model

关键词： RBF surrogate model turbine support structures

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Lateral shear performance of sheathed post-and-beam wooden structures with small panels

《结构与土木工程前沿（英文）》 2023年第17卷第7期页码 1117-1131 doi: 10.1007/s11709-023-0939-0

摘要： Sheathed post-and-beam wooden structures are distinct from light-wood structures. They allow for using sheathing panels that are smaller (0.91 m × 1.82 m) than standard-sized panels (1.22 m × 2.44 m or 2.44 m × 2.44 m). Evidence indicates that nail spacing and panel thickness determine the lateral capacity of the wood frame shear walls. To verify the lateral shear performance of wood frame shear walls with smaller panels, we subjected 13 shear walls, measuring 0.91 m in width and 2.925 m in height, to a low-cycle cyclic loading test with three kinds of nail spacing and three panel thicknesses. A nonlinear numerical simulation analysis of the wall was conducted using ABAQUS finite element (FE) software, where a custom nonlinear spring element was used to simulate the sheathing-frame connection. The results indicate that the hysteretic performance of the walls was mainly determined by the hysteretic performance of the sheathing-frame connection. When same nail specifications were adopted, the stiffness and bearing capacity of the walls were inversely related to the nail spacing and directly related to the panel thickness. The shear wall remained in the elastic stage when the drift was 1/250 rad and ductility coefficients were all greater than 2.5, which satisfied the deformation requirements of residential structures. Based on the test and FE analysis results, the shear strength of the post-and-beam wooden structures with sheathed walls was determined.

关键词： post-and-beam wooden structures with sheathed walls low reversed cyclic loading bearing capacity stiffness numerical simulation