Constitutive Modeling and Testing of Interface between Backfill Soil and Fiber-Reinforced Polymer

Toufigh, Vahab; Desai, C. S.; Saadatmanesh, Hamid; Toufigh, Vahid; Ahmari, Saeed; Kabiri, Ehsan

doi:10.1061/(asce)gm.1943-5622.0000298

Cited by 31 publications

(6 citation statements)

References 17 publications

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“…Further applications of results derived from a PSHA approach include development of the uniform hazard spectra and design spectra as well as the development of acceleration time histories. The latter can be further applied to the important geotechnical engineering problems such as site response analysis using a variety of analytical and numerical techniques to evaluate ampli cation of seismic waves in soil layers [49,[51][52][53][54][55][56][57].…”

Section: Seismic Hazard Analysis Approachmentioning

confidence: 99%

Evaluation of Peak Ground Acceleration for the City of Kerman through Seismic Hazard Analysis

Saafizaadeh

Bagheripour

2017

Scientia Iranica

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In this paper, Probabilistic Seismic Hazard Analysis (PSHA) approach is used to evaluate the distribution of Peak Ground Acceleration (PGA) and its corresponding probabilities for Kerman region in S-E of Iran. The geological and seismological data are integrated into a probabilistic seismic hazard model for the region. Historical and instrumental earthquake data, geology, tectonics, fault activity, and seismic source models associated with seismic events are taken into account. Foreshocks and aftershocks are rationally eliminated, and main shock records are used to evaluate seismicity parameters using Kijko method. The use of such a method is advantageous since it accounts for incomplete or inaccurate seismic data related to various seismic sources in the region. CRISIS2007 software is also used to carry out seismic hazard analysis for the region and to develop the maps of iso-acceleration contours for various return periods. The results have been displayed as the probabilistic estimates of PGA for the return periods of 50, 75, and 475 years. Comparing the results obtained here with those suggested by the Iranian Code of Practice for Seismic-Resistant Design of Buildings (Standard No. 2800 Version 1393) is also carried out. Results obtained in this study provide the basis for the preparation of seismic risk maps.

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Section: Seismic Hazard Analysis Approachmentioning

confidence: 99%

Evaluation of Peak Ground Acceleration for the City of Kerman through Seismic Hazard Analysis

Saafizaadeh

Bagheripour

2017

Scientia Iranica

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“…The debonding strength can be determined by singlelap shear tests and the fracture energy can be calculated using equation (3). Figure 8 shows the normalized fracture energy at the interface subjected to the five environmental conditions at 13 weeks of exposure.…”

Section: Fracture Energy Approachmentioning

confidence: 99%

“…2 Aramid and glass are fibers commonly applied in the manufacture of ships and automotive. 3 Much research has been done on the environmental effects (primarily temperature and moisture) on the bond at the interface of FRP and concrete and steel structures (Karbhari et al 2009). [3][4][5][6]21 ).…”

Section: Introductionmentioning

confidence: 99%

Environmental effects on the bond at the interface of fiber-reinforced polymer and masonry brick

Toufigh

Yarigarravesh

Mofid

2017

Journal of Reinforced Plastics and Composites

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This study examined the bond at the interface of masonry bricks and fiber-reinforced polymer when exposed to five environments. Three fabrics (aramid, carbon, and glass) and one type of epoxy resin were used. A total of 375 brickfiber-reinforced polymer specimens were made using wet lay-up technic and exposed to chemical solutions at four pH values (2.5, 7, 10, and 12.5) and substitute seawater. The effect of dry heat on the bond at the interface was also investigated. Single-lap shear tests were then carried out on the samples after 2, 4, 6, 8, 10, and 13 weeks of exposure. The experimental results indicated that freshwater and seawater had a considerable effect on the bond strength of brickaramid fiber reinforced polymer (AFRP) and brick-carbon fiber reinforced polymer (CFRP) samples; however, they did not significantly affect the bond strength of brick-glass fiber reinforced polymer (GFRP). Exposure to the severe environments was detrimental to bond strength. The results showed a significant loss of approximately 60% after 13 weeks of exposure to alkaline and acidic solutions. Dry heat did not significantly affect the bond strength of the tested samples.

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“…Filling gaps will reduce the strength of cemented backfill, , easily lead to roof collapse and stratified structural plane collapse, resulting in serious casualties and property losses . In order to avoid safety problems such as the collapse of filling retaining wall, the stratified filling method is often adopted in actual production; that is, secondary or multiple filling is carried out after the initial filling slurry condenses. , …”

Section: Introductionmentioning

confidence: 99%

Effect of Filling Interval Time on Mechanical Characteristics of Cemented Tailing Backfill

Ai,

Yu,

Wen

et al. 2023

ACS Omega

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In order to study the strength reduction caused by delamination, single-gap and double-gap specimens were made, and a uniaxial compressive strength (UCS) test was used to analyze the relationship between filling interval time (FIT) and UCS of single and double-spacing specimens. Based on the cement hydration reaction theory and damage mechanics, the influence mechanism of the FIT on backfill strength was studied. The test results show that the UCS of double-interval backfill is affected by two filling intervals at the same time, and the lower clearance has a greater influence on the strength of the backfill than the upper clearance. With the increase of FIT, the UCS of the filling body decreases gradually. The cementation effect of single and double fillings is negatively correlated with the FIT. Filling within 0−12 h has little effect on the strength of the filling body. On this basis, a mathematical model between damage increment and damage dissipated energy is established. Under the same stress condition, the larger the damage variable (D), the smaller the dissipated energy (G) required by the damage expansion of unit filling body. This study provides a reasonable reference for the design of the filling interval in mine fractional filling.

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Constitutive Modeling and Testing of Interface between Backfill Soil and Fiber-Reinforced Polymer

Cited by 31 publications

References 17 publications

Evaluation of Peak Ground Acceleration for the City of Kerman through Seismic Hazard Analysis

Evaluation of Peak Ground Acceleration for the City of Kerman through Seismic Hazard Analysis

Environmental effects on the bond at the interface of fiber-reinforced polymer and masonry brick

Effect of Filling Interval Time on Mechanical Characteristics of Cemented Tailing Backfill

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