Anchorage behavior of grouting sleeves under uniaxial and cyclic loading-A comparative study of the internal structure of sleeves

Li, Yubo; Zhang, Luchuan; Zhang, Quangang; He, Xingyang; Wang, Jingdong; Su, Ying

doi:10.1016/j.jobe.2022.104057

Cited by 6 publications

(1 citation statement)

References 25 publications

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“…Yan et al [28] studied the seismic performance of concrete frame beam-column connections and found that the seismic performance of the grouting sleeve connections was similar to that of the cast-in-place connections. Li et al [29] suggested that grouting sleeves containing threads and wedges could improve the anchor-ing performance of the sleeves under cyclic load. Zhao et al [30] conducted a series of experiments on the connection performance of grouting sleeves under large-strain cyclic loading, and derived formulas for estimating energy absorption and effective friction coefficients based on cumulative slip distance, grouting length and prestress.…”

Section: Introductionmentioning

confidence: 99%

Bond Performance of Seamless Steel Pipe Grouting Sleeves under Large-Deformation Repeated Tension and Compression after High Temperature

Zhao,

Wei,

Chen

et al. 2024

Buildings

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Grouting sleeves are widely used in the field of assembled construction. The present study aims to investigate the reliability of grouting sleeves under large-deformation repeated tension and compression after high temperature, considering the influences of steel bar diameter, the cooling method, and the protective layer. Through experimentation on 28 test pieces, we analyzed the bonding performance of the test pieces at different high temperatures. The results indicate that within the temperature range of 20–800 °C, the bond performance of the test pieces declines by no more than 9.8%. However, upon reaching a temperature of 1000 °C, the bond performance of the test pieces decreases by over 33.7%, with the compressive strength of the grout material reduced to only 27.50% of that kept at 20 °C. Employing larger-diameter steel bars is advantageous for maintaining the bond performance of the test pieces. Natural cooling shows relatively good bond performance, although its influence is not significant. Furthermore, the protective layer effectively attenuates the heating rate of the test pieces, thus safeguarding their bond performance. Scanning electron microscopy (SEM) analysis reveals that the decomposition of C-H and C-S-H phases is the primary cause of high-temperature degradation of the grouting material. Finally, a recommendation for the correlation coefficient (k) between the average bond strength and the compressive strength of the grout material is proposed, with a suggested value of k ≤ 2.58.

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Section: Introductionmentioning

confidence: 99%

Bond Performance of Seamless Steel Pipe Grouting Sleeves under Large-Deformation Repeated Tension and Compression after High Temperature

Zhao,

Wei,

Chen

et al. 2024

Buildings

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Cumulative damage and bearing capacity attenuation law of anchorage structure interface under cyclic loading and unloading

Wang

Guo

Cui

et al. 2023

Geomech. Geophys. Geo-energ. Geo-resour.

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The specimens of anchorage structures bonded by different anchoring materials are prepared to study the damage and reduced safety and reliability caused by the cyclic loading and unloading stress to the roadway anchorage structure. Using Fiber Bragg grating, acoustic emission monitoring and ANSYS, the anchorage structures’ bearing properties, interface failure characteristics, overall failure mode and internal influence mechanism are obtained under cyclic loading and unloading stress path. Results show that the cracks at the anchorage interface would develop and expand rapidly under this path, and the cumulative damage to anchorage structures is primarily caused by repeated residual deformation, periodic opening-expanding-closing of internal cracks, and impact vibration resulted from large-scale cyclic loading and unloading. Compared with the results under single pull-out stress, the ultimate loads of the anchorage structures bonded by H and S materials are reduced by 30.8% and 45.5%, respectively, and the radii of inner damage are increased by 1.64 and 1.67 times, respectively, showing a significant decrease in the bearing capacity of anchorage structures under cyclic loading and unloading. The anchorage structures bonded by these two materials have more prominent brittleness and weaker post-peak bearing capacity than those bonded by resin anchoring agent. Therefore, the balance between bonding strength and brittle-plastic extension characteristics shall be fully considered for the selection of anchoring materials. Five failure modes of anchorage structure are summarized: failure of the bolt-anchoring material interface, failure of the anchoring material-surrounding rock interface, fracture of the anchoring material, fracture of the bolt, and integral bulging of the anchorage structure. Besides, under the action of stress disturbance, the anchorage structure of bolt group can mobilize adjacent bolts to restrain the continuous damage and bearing capacity attenuation of the middle bolt, thus guaranteeing the overall safety and stability.

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Damage-based constitutive model for a fiber-reinforced high-toughness cementitious composite exposed to temperatures ranging from +200 °C to −100 °C

Qian

Shi

et al. 2023

Construction and Building Materials

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Anchorage behavior of grouting sleeves under uniaxial and cyclic loading-A comparative study of the internal structure of sleeves

Cited by 6 publications

References 25 publications

Bond Performance of Seamless Steel Pipe Grouting Sleeves under Large-Deformation Repeated Tension and Compression after High Temperature

Bond Performance of Seamless Steel Pipe Grouting Sleeves under Large-Deformation Repeated Tension and Compression after High Temperature

Cumulative damage and bearing capacity attenuation law of anchorage structure interface under cyclic loading and unloading

Damage-based constitutive model for a fiber-reinforced high-toughness cementitious composite exposed to temperatures ranging from +200 °C to −100 °C

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