Mechanical Behavior and Its Influencing Factors on Engineered Cementitious Composite Linings

Ding, Zude; Fu, Jiang; Li, Xiaoqin; Ji, Xiafei

doi:10.1155/2019/3979741

Cited by 7 publications

(5 citation statements)

References 30 publications

(36 reference statements)

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“…For simplicity, the present tests used vertical centralised loading to investigate the mechanical properties of the reinforced structure under loosening vertical soil pressure, which is similar to the loading method of existing experimental studies [22,23]. Taking the common two-lane road tunnel C30 reinforced concrete lining as the research object [24], based on the similarity theory, for the centralised loading method, the model lining specimens can be made of prototype materials when the effect of structural deadweight is not considered [25]. Therefore, this paper produced a test model according to the material similarity ratio of 1:1 and the geometric similarity ratio of 1:5.…”

Section: Experimental Content and Similar Designmentioning

confidence: 99%

“…As can be observed, the reinforced structure encountered four critical places under the vertical load: the reinforcement point (A), the point of spalling at the interface between the steel plate and UHPC (B), the point of peak load (C), and the failure point (D). The damage load was 85% of the peak load [24]. The process of vault subsidence is divided into four stages: (1) Before reinforcement, under the loading of vertical load at the top, the load increased nearly linearly with the increase in displacement.…”

Section: Relationship Between Load and Displacementmentioning

confidence: 99%

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Mechanical Characteristics of Cracked Lining Reinforced with Steel Plate–UHPC Subjected to Vertical Load

Wei,

Ding,

Shen

et al. 2024

Buildings

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The steel plate reinforcement method is widely used for strengthening damaged linings. Nevertheless, low durability is one of the disadvantages of the steel plate reinforcement method, which uses epoxy resin as the interface binder. To enhance the load-bearing performance and strengthening effect of steel-plate-reinforced structures, this study introduced ultra-high performance concrete (UHPC) as the reinforcing bonding layer and proposed a novel method for steel plate–UHPC reinforcement of cracked linings. A mechanical performance model test was conducted on a 1/5 scale lining model using a loading test device to evaluate the load-bearing performance and stress deformation of both conventional steel plate and steel plate–UHPC reinforced cracked linings. The characteristics, mechanisms of failure, and impacts of strengthening of the steel plate reinforcement method and steel plate–UHPC reinforcement method for cracked linings were compared. A numerical simulation model was developed to investigate the reinforcement effect of cracked linings using steel plate–UHPC reinforcement. The analysis included examining the influence of steel plate thickness, UHPC bonding layer thickness, and reinforcement timing. Model test results show that the overall damage mode of the steel plate–UHPC-reinforced structure had good elastic–plastic behaviour, and the deformation and damage process under the vertical concentrated load can be divided into four typical phases. Compared with the traditional steel plate reinforcement, the ultimate load-carrying capacity and ductility of the steel plate–UHPC-reinforced structure were increased by 53% and 366%, respectively, showing significantly better load-carrying capacity and deformation performance. Numerical simulation results show that the reinforced structure’s load-carrying capacity and stiffness enhancement rate increased non-linearly with the increase in UHPC layer thickness and steel plate thickness. However, reasonable reinforcement timing exists for steel plate-UHPC reinforcement, and too late reinforcement timing leads to a decrease in structural load-carrying capacity and stiffness enhancement rate.

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Section: Experimental Content and Similar Designmentioning

confidence: 99%

Section: Relationship Between Load and Displacementmentioning

confidence: 99%

Mechanical Characteristics of Cracked Lining Reinforced with Steel Plate–UHPC Subjected to Vertical Load

Wei,

Ding,

Shen

et al. 2024

Buildings

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“…The energy dissipation factor is the ratio of the energy consumed by a hysteresis loop to load and unload for a circle to the total energy of loading and unloading. The energy dissipation factor E ′ of the specimen [15][16][17][18] can be calculated by formula (5).…”

Section: Structural Systemmentioning

confidence: 99%

Finite Element Analysis Model Design on the Mechanical Properties of Prefabricated Shear Wall Structure

Zhang

2022

Scientific Programming

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At present, the mechanical properties analysis method of prefabricated shear wall structure based on static test is low overall simulation precision. In this paper, the finite element method is used to analyze the force performance of the prefabricated shear wall structure. Based on the shear of concrete material, elastic modulus, Poisson ratio, open fracture, the transfer coefficients of open and closed fracture, and tensile strength parameters, the finite element model is established by ANSYS. The vertical load and the horizontal load of the prefabricated shear wall structure are calculated, and the limit load value is obtained. The maximum stress change of the connector, the energy dissipation of the shear wall structure, and the change of the equivalent viscous damping coefficient are obtained by the way of loading and displacement change. The experimental results show that the simulated values of stiffness degradation, maximum displacement, maximum strain, and stress distribution obtained by this method are in good agreement with the actual values and are reliable.

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“…Uniaxial compression test of the rubber plate indicated that the compressive stiffness of the rubber plate was 3.38 MN/m. A total of eight rubber plates were used to simulate the formation constraints of the lining model test and the equivalent formation resistance coefficient was calculated to be 27.9 MPa/m [22][23][24]. To investigate the effect of voids on mechanical properties of tunnel linings, five model test conditions were set up as follows.…”

Section: Model Test Schemementioning

confidence: 99%

Influence of Symmetric and Asymmetric Voids on Mechanical Behaviors of Tunnel Linings: Model Tests and Numerical Simulations

Ding

et al. 2019

Symmetry

Self Cite

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The presence of symmetric and asymmetric voids directly affects the mechanical behaviors of tunnel linings and further induces tunnel diseases among influence factors. In this paper, 1:5-scale model tests were carried out to study the mechanical behaviors of reinforced concrete (RC) linings considering the voids located at the crown and at the spandrel. Based on the experimental results and concrete plastic damage (CDP) model, the effects of void (i.e., location and size), subgrade stiffness, and lining size on bearing capacity of RC lining were investigated using numerical simulation. The results of model test and parametric analysis showed that the existence of voids significantly affected the mechanical behavior of the lining during inelastic deformation period. The lining with a larger void size corresponded to low bearing capacity and larger deformation around the void, thus increasing the damage possibility of linings. The influence of voids on the bearing capacity of linings varied with the void location, load direction (especially under horizontal symmetrical loads), and subgrade stiffness. High soil stiffness corresponded to a great influence of the void size on the lining bearing capacity. In addition, the lining strength increased inconsistently with the increase of model size. On the basis of parameter sensitivity analysis, the Levenberg–Marquardt (L-M) optimization algorithm and Logistic model were used to establish the equation of lining bearing capacity loss rate considering the void effect.

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Mechanical Behavior and Its Influencing Factors on Engineered Cementitious Composite Linings

Cited by 7 publications

References 30 publications

Mechanical Characteristics of Cracked Lining Reinforced with Steel Plate–UHPC Subjected to Vertical Load

Mechanical Characteristics of Cracked Lining Reinforced with Steel Plate–UHPC Subjected to Vertical Load

Finite Element Analysis Model Design on the Mechanical Properties of Prefabricated Shear Wall Structure

Influence of Symmetric and Asymmetric Voids on Mechanical Behaviors of Tunnel Linings: Model Tests and Numerical Simulations

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