Creep behavior of basalt fiber reinforced polymer tendons for prestressing application

Wang, Xin; Shi, Jianzhe; Liu, Jianxun; Yang, Ligang; Wu, Zhishen

doi:10.1016/j.matdes.2014.03.009

Cited by 140 publications

(67 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The viscoelastic strain is also considered to be in direct proportion to the square of stress (Wang et al 2014). Iterative calculations were conducted at 1, 5, 10, 20, 40, 60, 80, 100, 500, 1000 h. The theoretical relaxation rate in the current study is calculated to be 5.0 % at 1000 h under 0.5 fu, with only 5.7 % relative error compared to the experimental value.…”

Section: Theoretical Relaxation Ratementioning

confidence: 93%

“…3, with known viscoelastic strain of specimen during 1000 h, which has been obtained by the previous research on creep behavior of BFRP tendon (Wang et al 2014). …”

Section: Theoretical Relaxation Ratementioning

confidence: 99%

“…Basalt FRP (BFRP) was newly developed (Wu et al 2012) and its potential advantages in structural 434 reinforcement have been gradually recognized (Wang et al 2013;Shi et al 2013). The most significant advantage of BFRP is its superior creep behavior, displaying a creep rupture limit of 0.52 fu (fu = ultimate strength) (Wang et al 2014). This property allows BFRPs to be used as competitive prestressing members to carbon FRP (CFRP) and aramid FRP (AFRP), whose creep rupture limit are 0.70 fu and 0.55 fu, respectively (ACI 2004).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Relaxation behavior of BFRP tendon for prestressing application

Shi¹,

Wang²,

Wu³

et al. 2015

Proceedings of the Second International Conference on Performance-Based and Life-Cycle Structural Engineering (PLSE 2015)

Self Cite

View full text Add to dashboard Cite

Relaxation is a key factor controlling the application of prestressing tendons. This paper focuses on the relaxation behavior of newly developed BFRP tendon for prestressing applications. A series of relaxation tests on BFRP tendons with three different initial stresses of 0.4 fu 0.5 fu and 0.6 fu (fu = tensile strength) were first conducted through a specially designed setup to eliminate the adverse impact of slippage at anchor zone.Theoretical value of relaxation rate based on an existing theory was calculated. An additional group of test was designed to clarify the effect of pretension on the relaxation behavior. The results show that the setup can effectively measure the relaxation loss of specimen, with monitoring the slippage at anchor zone simultaneously.Higher stress level can lead to larger relaxation loss. Theoretically calculated value of relaxation rate is consistent with the experimental results. The relaxation rates of BFRP tendon at 1000 h are 4.2 %, 5.3 % and 6.4 % under 0.4 fu, 0.5 fu and 0.6 fu, respectively. Pretension performs effective for the controlling of relaxation loss. Specimens with pretension treatment behave only 2.6 % relaxation rate under 0.5 fu at 1000 h, comparable to the relaxation rate of prestressing steel strand under 0.7 fu at 1000 h (2.5 %). The load retentions at one million hours are predicted to be 93.8 %, 91.8 % and 90.0 % for BFRP tendons under 0.4 fu 0.5 fu and 0.6 fu, respectively. Also, a load retention of 93.3 % is predicted for BFRP tendon with pretension treatment, under 0.5 fu, at one million hours.

show abstract

Section: Theoretical Relaxation Ratementioning

confidence: 93%

“…3, with known viscoelastic strain of specimen during 1000 h, which has been obtained by the previous research on creep behavior of BFRP tendon (Wang et al 2014). …”

Section: Theoretical Relaxation Ratementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Relaxation behavior of BFRP tendon for prestressing application

Shi¹,

Wang²,

Wu³

et al. 2015

Proceedings of the Second International Conference on Performance-Based and Life-Cycle Structural Engineering (PLSE 2015)

Self Cite

View full text Add to dashboard Cite

show abstract

“…As the temperature increased, the resin matrix softened, and internal stress released the fiber out the restraint of the epoxy resin. This phenomenon indicates that the destruction is from the surface to the inside, gradually accompanied with the internal stress release [18]. …”

Section: Thermomechanical Properties Of Bfrpmentioning

confidence: 93%

“…Shi et al [17] examined the creep behavior of BFRP tendons, and their stress levels were determined to be 0.8f u , 0.78f u , 0.75f u , and 0.7f u . As found, BFRP specimens can sustain a stress level of 0.7f u without fracture within 1000 h. Wang et al [18] studied the creep behavior of BFRP tendons with sustained stress to the tensile strength at 50%, 60%, 65%, 68%, and 70%. Residual tensile strength was predicted based on a linear fitting.…”

Section: Introductionmentioning

confidence: 97%

Creep Behavior of Resin Matrix and Basalt Fiber Reinforced Polymer (BFRP) Plate at Elevated Temperatures

Xian

Rashid

2017

J. Compos. Sci.

View full text Add to dashboard Cite

Pre-stressed fiber reinforced polymer (FRP) has great application potential in structural strengthening. However, the elevated temperature resistance of FRPs is always a key concern due to the poor thermal stability of its resin matrix. In this study, the effects of temperature on the creep behavior of the resin matrix and basalt fiber reinforced polymer (BFRP) was experimentally investigated. The tensile stresses were set at 2.6 MPa for the resin matrix and 522 MPa (35% of its ultimate tensile strength (f u )) for BFRP, and the exposure temperatures were 25 • C, 80 • C, 120 • C, and 160 • C. The short-term strain of the resin matrix and BFRP exposed to different exposure temperatures was measured. The variation of the thermal property and interlaminar shear strength (ILSS) of the BFRP were studied. The results indicated that molecular chain disruption and post-cure coexisted. The resin matrix is sensitive to the exposure temperatures, and a remarkable increase of the strain was observed when the exposure temperature exceeded its glass transition temperature (107.5 • C). The resin matrix fractured within 50 seconds when it was exposed to 160 • C. BFRP showed excellent temperature resistance even though the exposure temperature exceeded its glass transition temperature (123.7 • C). Sustained loading led to stress transferring to the basalt fiber in BFRP specimens, especially at elevated temperatures. Stress redistribution caused interfacial damage, and ILSS decreased by 0.5%, 13.6%, and 14.6% for 80 • C, 120 • C, and 160 • C exposure from its original value of 73.5 MPa. Dynamic mechanical thermal analysis (DMTA) was used to explain the post-curing and interface damage of BFRP.

show abstract

Hybridization effects on charpy impact behavior of basalt/aramid fiber reinforced hybrid composite laminates

2016

View full text Add to dashboard Cite

Basalt/aramid hybrid fiber reinforced composite laminates were prepared to examine the effect of hybridization on Charpy impact behavior of aramid fiber reinforced composite laminates. The effect of position of basalt layers on the impact behaviors was also investigated by preparing hybrid composite laminates with the substitution of basalt layers into different positions. The position change of basalt layers in the hybrid configurations were resulted in variations in the impact behavior. The impact energy and impact damages strictly depended on impact behavior of fiber at impacted surface due to the difference between deformation characteristics of basalt fiber and aramid fiber. When the basalt layer was at the impacted surface, the hybrid composite laminates exhibited a lower impact energy. This was attributed to the restriction in deformation of aramid layers. The position of basalt layers resulted in variations in the impact behavior of hybrid composite laminates. POLYM. COMPOS., 39:467–475, 2018. © 2016 Society of Plastics Engineers

show abstract

Creep behavior of basalt fiber reinforced polymer tendons for prestressing application

Cited by 140 publications

References 8 publications

Relaxation behavior of BFRP tendon for prestressing application

Relaxation behavior of BFRP tendon for prestressing application

Creep Behavior of Resin Matrix and Basalt Fiber Reinforced Polymer (BFRP) Plate at Elevated Temperatures

Hybridization effects on charpy impact behavior of basalt/aramid fiber reinforced hybrid composite laminates

Contact Info

Product

Resources

About