Comparison Analysis of GFRP Anchor Pile Performance in Expansive Soil Foundation

2013 ◽  
Vol 859 ◽  
pp. 243-247
Author(s):  
Xue Jun Liu
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Traditional Method ◽  
Expansive Soil ◽  
Comparison Analysis ◽  
Cement Ratio ◽  
Water Cement Ratio ◽  
Advantages And Disadvantages ◽  
Soil Foundation ◽  
Soil Area

GFRP anchor pile is to be researched and promoted in expansive soil foundation of tower buildings and underground buildings. Expansive soil area was selected, and comparison scheme of reinforced concrete anchor pile and GFRP anchor pile was designed. Uplift and compressive ultimate bearing capacity comparison experiment was done by one grouting, twice grouting, water cement ratio and soak. The performance of the two types of anchor pile each has advantages and disadvantages. Durability, safety, economy are considered, and traditional method of anchor pile can be improved. GFRP anchor pile and reinforced concrete anchor pile can be used in combination, and that can be better used in expansive soil foundation.

Treatment Technology for Embankment Landslide Caused by Expansive Soil Foundation Instability

2012 ◽  
Vol 204-208 ◽  
pp. 3035-3039
Author(s):  
Xian Yuan Tang ◽  
Yong Peng Li
Keyword(s):  
Reinforced Concrete ◽  
Treatment Effect ◽  
Concrete Beams ◽  
Expansive Soil ◽  
Reinforced Concrete Beams ◽  
Treatment Technology ◽  
Chemical Grouting ◽  
Steel Piles ◽  
Pressure Chemical ◽  
Soil Foundation

The embankments built on expansive soil foundation with a transverse are prone to crack and slide failure. In this paper, the embankment in a certain section of Bailong highway destroyed due to cracks and rainfall. A group of steel piles and reinforced concrete beams is used to strengthen the toe of slopes, and steel piles and reinforced concrete framework beams is utilized to strengthen embankment slopes, then pressure chemical grouting is used to reinforce soil. The treatment effect is good.

scholarly journals Сomparative analysis of the methods of strengthening of masonry, metal structures, reinforced concrete, such as traditional methods and the alternative methods of strengthening by FRP-materials

2020 ◽  
pp. 267-291
Author(s):  
Iryna Rudnieva
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Alternative Methods ◽  
Building Structures ◽  
Traditional Methods ◽  
External Appearance ◽  
Metal Structures ◽  
Advantages And Disadvantages ◽  
Heritage Buildings ◽  
Determining Factor

Built mostly centuries ago, heritage buildings as well the more contemporary buildings of the last century, which have lost the bearing capacity often need restoration and strengthening, especially in seismic regions and in regions with shrinkage phenomena (subsidence region). The need of strengthening of the building constructions during exploitation appears mostly because of their premature wear as a result of technological influences and weathering, various damage and various other factors. Traditional methods of strengthening are effective, but in some cases not appropriate or not applicable  for use. An example is the increase of the load-bearing structures of historical buildings, preserving the external appearance of which is the determining factor. In this case, the use of the discussed alternative methods can be justified alternative. Knowledge of the causes of defects and damage of structures allows to choose the best option of repairing or strengthening. The aim of the research is the evaluation of the structural performance of composite fibre-reinforced elements in the wider sector of the conservation of historical, architectonic and environmental heritage, as well the more contemporary buildings of the last century, which have lost of the bearing capacity focusing reliability indexes and the appearance of the structure. In the article was described and analyzed the existing traditional methods and the alternative methods of strengthening by FRP-materials (composite materials) such building structures as masonry, metal structures, reinforced concrete, and the computation in software ABAQUS. These procedures of strengthening building structures by FRP-materials  in Ukraine are not widely used due to the lack of a regulatory framework that would regulate their use, as well because these materials are relatively expensive compared to the traditional ones. The article analyzed the existing methods of computation and design of the strengthening using FRP-materials, and the computation in software ABAQUS was performed with conclusions and recommendations based on results of the computation. The aim of the work was to review the technology and analyze the advantages and disadvantages of each of the strengthen methods that should be used when choosing effective solutions for strengthening building structures. In conclusion, the need for further study and researches was confirmed.

scholarly journals Contact and Noncontact Ultrasonic Nondestructive Test in Reinforced Concrete Beam

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Jason Maximino C. Ongpeng ◽  
Andres Winston C. Oreta ◽  
Sohichi Hirose
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beam ◽  
Plain Concrete ◽  
Reinforced Concrete Beam ◽  
Ultrasonic Test ◽  
Reinforced Concrete Beams ◽  
Cement Ratio ◽  
Water Cement Ratio ◽  
Air Gaps ◽  
Wave Path

Contact-type ultrasonic test is commonly used in construction industry where gel-couplant is applied to the material being tested and the transducers to assure that wave propagation will travel through without any air gaps. However, this method has disadvantages, since surface preparation is considered prior to testing. Another method of testing without the worry of air gaps that causes scattering of waves before it reaches the medium is the use of the noncontact ultrasonic test. In particular, the air-coupled ultrasonic test is done in this paper for reinforced concrete beams. Sixteen plain concrete cube specimens under the compression test and six reinforced concrete beam specimens under the four-point bending test are made with water-cement ratio of 40% and 60%. The plain concrete cubes are investigated to establish the relationship of the contact ultrasonic test and load. Added parameters are considered to investigate the sensitivity of the contact and noncontact ultrasonic test in reinforced concrete beams. These are ultrasonic wave path and the neutral axis index. It shows that the higher water-cement ratio produces good sensitivity in the noncontact ultrasonic test, since it produces more cracks on the tension face. Lower water-cement ratio gives good sensitivity with load for the contact ultrasonic test, since it has its ultrasonic wave path passing through the concrete experiencing compression. In addition, the neutral axis index for a member subjected to bending is an important factor in assessing the sensitivity of both contact and noncontact ultrasonic test.

scholarly journals COMPARISON OF THE STRUCTURAL PROPERTIES OF CONCRETE BEAMS WITH COMPOSITE BASALT AND STEEL REINFORCEMENT

2021 ◽  
Author(s):  
Serhiy Sakhno ◽  
◽  
Lyudmyla Yanova ◽  
Olena Pischikova ◽  
◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Concrete Beams ◽  
Control Sample ◽  
Steel Reinforcement ◽  
Isotropic Hardening ◽  
Utilization Factor ◽  
Advantages And Disadvantages ◽  
The Cost ◽  
Composite Reinforcement

The subject of the study. The work investigated the deformative, strength, and cost parameters of concrete beams with various reinforcement types. The nature of the behavior under a load of beams reinforced with steel reinforcement and beams with basalt reinforcement of multiple diameters has been studied. A research methodology is the studying of finite element models of the reinforced concrete beam. The Drucker-Prager model was used to simulate concrete behavior. For steel reinforcement, a bilinear isotropic hardening model, a linear orthotropic model was used for composite reinforcement. The goal is to reveal the advantages and disadvantages of using basalt composite reinforcement in reinforced concrete. Conclusion of the study. The paper considers the behavior of four models of reinforced beams. In the first model, a control one, steel reinforcement, is used. In the second, the composite reinforcement diameter is equal to the diameter of the steel one. In the third model, the diameters of the composite reinforcement are taken from the conditions of its similar bearing capacity with the steel one. The fourth model's composite reinforcement diameters have been taken from the requirements of its equal deformation with the steel one. The paper presents a method for calculating the corresponding diameters of reinforcement. The model in which the diameters of the composite reinforcement are taken from the conditions of its equal deformation with the steel reinforcement has the beam's best operation. In this case, the deformations and stresses in concrete practically do not differ from the corresponding stresses in the model with steel reinforcement. However, the utilization factor of the bearing capacity of the reinforcement in this model is deficient, and the cost of reinforcing elements is almost three times the cost of steel rods. The model in which the diameters of composite reinforcement are taken based on its equal bearing capacity with steel reduces the cost of reinforcement almost three times. However, such a beam's deformation and strength properties are significantly worse than in the control sample. The model with composite reinforcement diameters equal to the steel reinforcement diameters has no advantages over the model with steel reinforcement.

scholarly journals Effect of Water Cement Ratio In Hybrid Fibre Reinforced Concrete

2019 ◽  
Vol 8 (9S3) ◽  
pp. 1595-1597
Keyword(s):  
Reinforced Concrete ◽  
Steel Fiber ◽  
Fiber Content ◽  
Fibre Reinforced Concrete ◽  
High Quality ◽  
Cement Ratio ◽  
Water Cement Ratio ◽  
Effect Of Water ◽  
Content Measurement ◽  
Hybrid Fibre

This paper presents to consider quality and exhibitions of steel fiber fortified cement (SFRC) and half and half fiber strengthened cement (HFRC) distinctive water concrete proportion just as 0.4, 0.35. The half breed filaments consider in the mix of snared end steel strands and polypropylenes filaments. Technique: To think about the compressive quality in the fiber content measurement Vf ran from 0.5 to 2.0 percent of steel filaments, and 0.8SF0.2PP, 0.7SF0.3PP, 0.6SF0.4PP, 0.5SF0.5PP of half breed strands for two diverse water bond proportion, the evaluation of cement utilized for this examination M40. Totally16 blends were arranged and tried in the lab. Results: at long last, 1.0% of SFRC and 0.8SF 0.2 PP HFRC gives great quality for both water bond proportion Less quantities of splits were seen in fiber fortified high quality solid examples, which demonstrate an improved malleability with the expansion of strands in the framework.

scholarly journals Relationship between Water Cement Ratio and Characteristic Properties of Multi Walled Carbon Nano Tube Reinforced Concrete

2020 ◽  
Vol 9 (4) ◽  
pp. 231-236
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Reinforced Concrete ◽  
Multiwalled Carbon ◽  
Split Tensile Strength ◽  
Cement Ratio ◽  
Water Cement Ratio ◽  
Concrete Mixtures ◽  
Carbon Nano Tubes ◽  
Carbon Nano Tube

In this study effect of water-cement ratio (W/C) on the characteristic properties of multiwalled carbon nano tube reinforced concrete is analyzed. Five concrete mixtures of different water-cement ratio (W/C) with and without carbon nano tubes (CNTs) were prepared. W/C of 0.40, 0.45, 0.48, 0.50 and 0.55 were used while quantity of carbon nano tube (CNT) was fixed at 1% by weight of cement (wbc). Ratio of cement, sand and aggregates was also fixed at 1: 1.76:2.66 in all mixes. For maintaining workability 0.5% polycarboxlate based superplasticizer wbc was added in all mixes.. The workability of carbon nanotube reinforced concrete (CNTC) reduced by 60% and W/C=0.50 was found ideal for slump as well as strength. At this W/C compressive strength for CNTC increased by 7.20%, split tensile strength increased by 25.75% and flexural strength increased by 3.87%.

scholarly journals Effect of Water-Cement Ratio on Flexural Strength of RC Beams Made with Partial Replacement of Coarse Aggregates with Coarse Aggregates from Old Concrete

2019 ◽  
Vol 9 (1) ◽  
pp. 3826-3831
Author(s):  
M. Oad ◽  
A. H. Buller ◽  
B. A. Memon ◽  
N. A. Memon ◽  
Z. A. Tunio ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Flexural Strength ◽  
Concrete Beams ◽  
Recycled Concrete ◽  
Reinforced Concrete Beams ◽  
Partial Replacement ◽  
Cement Ratio ◽  
Water Cement Ratio ◽  
Coarse Aggregates ◽  
Effect Of Water

This research paper presents an experimental evaluation of the effect of water-cement ratio on the flexural strength of reinforced concrete beams made with 50% replacement of coarse aggregates with recycled concrete aggregates (RCA). 72 reinforced concrete beams were cast using 0.54, 0.6, 0.65 and 0.70 water-cement ratio. In each ratio, 12 beams were cast using RCA and 3 beams were cast using all-natural coarse aggregates (NCA). Beams were cured for 7 and 28 days. After curing, all beams were tested with central point load in a universal load testing machine. From the obtained results, it is observed that the maximum reduction in flexural strength of RCA beams is about 28% when compared to the 0.54 w/c ratio beams of the same group and 31.75% in comparison to NCA beams cast with same w/c ratio. The maximum deflection and average strain in beams remained within limits. The observed cracking pattern shows shear failure of all beams.

Sign in / Sign up

Export Citation Format

Share Document