Developments and Prospects of Long-Span High-Speed Railway Bridge Technologies in China

Qin, Shunquan; Gao, Zongyu

doi:10.1016/j.eng.2017.11.001

Cited by 113 publications

(23 citation statements)

References 2 publications

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“…Nowadays, composite materials, nanomaterials, and highperformance materials are flourishing with advanced theories and manufacturing technologies [7][8][9][10][11][12]. Structures can now be made in various forms according to demand, allowing for ultra-high buildings, long-span bridges, undersea tunnels, and other special-purpose structures [13][14][15][16][17]. We can even customize the properties of various materials used in a structure as needed.…”

Section: Introductionmentioning

confidence: 99%

Materials-oriented integrated design and construction of structures in civil engineering—A review

Ming¹,

Huang²,

Li³

2022

Front. Struct. Civ. Eng.

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Design is a goal-oriented planning activity for creating products, processes, and systems with desired functions through specifications. It is a decision-making exploration: the design outcome may vary greatly depending on the designer’s knowledge and philosophy. Integrated design is one type of design philosophy that takes an interdisciplinary and holistic approach. In civil engineering, structural design is such an activity for creating buildings and infrastructures. Recently, structural design in many countries has emphasized a performance-based philosophy that simultaneously considers a structure’s safety, durability, serviceability, and sustainability. Consequently, integrated design in civil engineering has become more popular, useful, and important. Material-oriented integrated design and construction of structures (MIDCS) combine materials engineering and structural engineering in the design stage: it fully utilizes the strengths of materials by selecting the most suitable structural forms and construction methodologies. This paper will explore real-world examples of MIDCS, including the realization of MIDCS in timber seismic-resistant structures, masonry arch structures, long-span steel bridges, prefabricated/on-site extruded light-weight steel structures, fiber-reinforced cementitious composites structures, and fiber-reinforced polymer bridge decks. Additionally, advanced material design methods such as bioinspired design and structure construction technology of additive manufacturing are briefly reviewed and discussed to demonstrate how MIDCS can combine materials and structures. A unified strength-durability design theory is also introduced, which is a human-centric, interdisciplinary, and holistic approach to the description and development of any civil infrastructure and includes all processes directly involved in the life cycle of the infrastructure. Finally, this paper lays out future research directions for further development in the field.

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Section: Introductionmentioning

confidence: 99%

Materials-oriented integrated design and construction of structures in civil engineering—A review

Ming¹,

Huang²,

Li³

2022

Front. Struct. Civ. Eng.

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“…e interaction between reinforced concrete (RC) structures and the environment, including such factors as the temperature, humidity, carbonation, and corrosion, may produce significant deterioration in a structure's stiffness [1][2][3][4]. Steel corrosion give rise to cross-sectional area loss or stiffness loss in RC structures [5,6].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Relationship between the Natural Frequency and the Corrosion in Reinforced Concrete Beams

Zhang

Sun

Dong³

2021

Advances in Materials Science and Engineering

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Due to many nondamage factors such as temperature, humidity, carbonation, and corrosion effects on natural frequency, the key problem of the application frequency-based method to detect damage is to reveal the rules of these factors affect natural frequency and further to eliminate their effects. The long-term characteristics of reinforced concrete structures require a lot of attention, especially in corrosive environment. In this paper, an experimental investigation was conducted to study the deflection and natural frequency of reinforced concrete beam in a marine environmental chamber for six corrosion stages (accelerated corrosion for 0, 20, 40, 70, 100, and 140 days). The experimental results demonstrated that deflection increases with corrosion time, while natural frequency decreases with corrosion time. Based on the accelerate corrosion test data of reinforced concrete beams, the general expression of the relationship between corrosion depth and natural frequency has been established through the fitting curve method. The polynomial model has been selected for establishing the relationship between steel corrosion depth (including the main reinforcement and stirrup) and natural frequency. The reason for selecting the polynomial model is that the sum of squares due to error (SSE) is closer to 0 and the coefficient of multiple determination (R-square) is closer to 1. This investigations help to discriminate the cause of reinforced concrete beams natural frequency change, to eliminate nondamage factors affects, and to apply many structural damage identification methods effectively.

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“…Restricted to simple design methods disregarding these issues, large anti-slip safety redundancy is required in design and needs to be realized either through underestimating real COF between clamps and cables (ASCE/SEI 19-96, 2016) or through adopting high level of the clamp bolt preload (JTG/T D65-05-2015, 2015), both are not quite reasonable. On the other hand, with rapid development of the modern communication and the infrastructure construction, more long-span heavy-loading railway and multi-function combined cable stayed bridges (Qin and Gao, 2017) and pre-stressed spatial structures (Chen and Dong, 2013; Chen and Feng, 2016; Guo and Jiang, 2016; Quagliaroli et al, 2015) are demanded, thus requiring larger scaled cable-clamp connection system with higher anti-slip capacity. Current experimental schemes and the simplified calculation methods by the design codes are unable to provide economic and reliable solution to the slip resistance issue.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and numerical studies of the slip resistance of main cable clamp composed of an upper and a lower part

Miao

Shen

Wang

et al. 2020

Advances in Structural Engineering

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Cable clamps are important connection members widely used in suspension bridges and cable structure buildings. The clamps are usually tightened on the cable through pre-stressed bolts and resist cable axial component of the external load by friction. Current relevant standards provide slip resistance formulas for anti-slip design of the clamps but are conceptive and simple, lacking explicit and quantitative mechanical derivation. This paper develops an analytical model and proposes a novel slip failure criterion based on the slippage amount, aiming at understanding the force state and estimating the slip resistance of the main cable clamp composed of an upper and a lower part. Finite element analyses then validate that the analytical model can correctly reveal the influences of the multiple factors including hanger tensile force and orthotropic friction on the force state of the cable-clamp system. Moreover, the original Coulomb-friction-law-based slip resistance formula is briefly revised by introducing a partial factor in order to take the nonlinearity of the connection system into account. The revised slip resistance formula implies its promising applicability in obtaining reliable and flexible solution to anti-slip problem of the clamp with different level of safety redundancy.

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Developments and Prospects of Long-Span High-Speed Railway Bridge Technologies in China

Cited by 113 publications

References 2 publications

Materials-oriented integrated design and construction of structures in civil engineering—A review

Materials-oriented integrated design and construction of structures in civil engineering—A review

Experimental Study on the Relationship between the Natural Frequency and the Corrosion in Reinforced Concrete Beams

Theoretical and numerical studies of the slip resistance of main cable clamp composed of an upper and a lower part

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