scholarly journals Sensitivity analysis on deformation of woven polyethylene formwork

2021 ◽  
Vol 878 (1) ◽  
pp. 012044
Author(s):  
A Leony ◽  
K G Summakwan ◽  
J Sjah ◽  
A D Rarasati ◽  
H Purnomo
Keyword(s):  
Sensitivity Analysis ◽  
Elastic Modulus ◽  
Fresh Concrete ◽  
Field Work ◽  
Wire Mesh ◽  
Thermal Coefficient ◽  
Load Model ◽  
Perfect Correlation ◽  
Pearson Coefficient ◽  
Concrete Temperature

Abstract The use of different material quality and amount can affect formwork performance at the beginning of casting. Practical easy to install formwork such as woven polyethylene with wire mesh reinforcement makes field work easier. Sensitivity analysis on the elastic modulus and the thermal coefficient variables of woven polyethylene, fresh concrete temperature during casting and fresh concrete load model are the objectives of this research. The research is performed by comparing experimental data and the numerical modeling of woven polyethylene formwork using Finite Element Method. The formwork span and width dimension are 1 m x 0.3 m, with a variety of heights namely 0.6 m, 0.45 m, and 0.3 m. The sensitivity value for each variable will be evaluated based on Pearson coefficient or R. The sensitivity analysis of thermal coefficient showed no correlation to changes in formwork deformation. The sensitivity analysis of elastic modulus and fresh concrete temperature showed perfect correlation to changes in formwork deformation although the changes are small (around 0.0003 cm to 0.0006 cm). The fresh concrete load model showed perfect correlation to formwork deformation as well as becoming the determining variable of the changes in the formwork deformation values.

scholarly journals Simplified Identification Strategy of Load Model Based on Global Sensitivity Analysis

IEEE Access ◽  
2020 ◽  
pp. 1-1
Author(s):  
Xing. Tian ◽  
Xueliang. Li ◽  
Long. Zhao ◽  
Zuoyun. Tan ◽  
Shuchen. Luo ◽  
...  
Keyword(s):  
Sensitivity Analysis ◽  
Global Sensitivity Analysis ◽  
Load Model ◽  
Global Sensitivity ◽  
Model Based ◽  
Identification Strategy

scholarly journals Characteristics of PVC Coated Welded Wire Mesh Fiber Reinforced Concrete

2019 ◽  
Vol 21 (1) ◽  
pp. 50-56
Author(s):  
Indradi Wijatmiko ◽  
Ari Wibowo ◽  
Christin Remayanti Nainggolan
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Elastic Modulus ◽  
Fiber Reinforced Concrete ◽  
Wire Mesh ◽  
Fibrous Materials ◽  
Strength Tests ◽  
Fiber Concrete ◽  
Strain Stress ◽  
Mesh Fiber

Fiber concrete containing fibrous materials is manufactured to improve the low tensile strength of concrete and its brittle properties. In this research, fiber obtained from PVC coated welded wire mesh with diameter of 1 mm was utilized. There were several variations of fiber concrete samples made. Samples were subjected to tensile and compressive strength tests. The elastic modulus was measured by using extensometer and strain-stress gauges. The results show that the incorporation of PVC coated welded wire mesh increases the tensile strength of concrete, when the percentage of the fiber is 1.5%, with the length of 3.6cm, and the interlocking of 1.2cm. However, the compressive strength is slightly reduced from the normal ones. The elastic modulus results show that the introduction of PVC coated welded wire mesh tends to reduce the flexibility, as the value reduced 15-50% as compared to the normal ones without any fiber

Research on Parameters Indentification of Synthesis Load Model Considering Distribution Network Connection

2013 ◽  
Vol 712-715 ◽  
pp. 1343-1346
Author(s):  
Guo Ping Shi ◽  
Peng Gu
Keyword(s):  
Sensitivity Analysis ◽  
Power Grid ◽  
Computing Time ◽  
Distribution Network ◽  
Model Parameters ◽  
Model Structure ◽  
Actual Performance ◽  
Load Model ◽  
Network Connection ◽  
Simulation Results

Synthesis load model considering distribution network connection can simulate actual performance of power grid, however, the model structure is quiet complicated, and distinguished result of parameters is not unique. To solve the above-mentioned problems, this paper proposes a load model parameters identification method based on sensitivity analysis by analysis the structure of synthesis load model with distribution network connection, The simulation results show the model is effective and proper, and the method can reduce computation and save computing time.

scholarly journals Elastic Modulus Extraction of Wire Mesh for Vibration Mount Development

2016 ◽  
Vol 26 (7) ◽  
pp. 806-813 ◽  
Author(s):  
Tae-Yeon Kim ◽  
Yun-ho Shin ◽  
S.J. Moon ◽  
B.C. Jung ◽  
T.J. Lee
Keyword(s):  
Elastic Modulus ◽  
Wire Mesh

scholarly journals ANALISA PENGARUH ADMIXTURE TERHADAP ABU TERBANG (FLY ASH) DAN BOTTOM ASH

2018 ◽  
Vol 6 (2) ◽  
pp. 114-123
Author(s):  
Redaksi Tim Jurnal
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Silica Fume ◽  
Fresh Concrete ◽  
Setting Time ◽  
Bottom Ash ◽  
Initial Time ◽  
Concrete Compressive Strength ◽  
Concrete Temperature ◽  
Concrete Quality

With improve the quality of concrete is by using the addition of admixture. By adding admixture Silica fume and superplasticizer is expected to improve concrete quality in concrete using fly ash and bottom ash. The main objective of this research is to know the value of concrete compressive strength, slump test value, fresh concrete temperature and setting time in concrete using fly ash and bottom ash by 0%, 5%, 10%, 15%, 20% and 25% by weight of cement, with variations of silica fume 0%, 2%, 4%, 6 %, 8%, 10% of the weight of cement that has been reduced by the weight of fly ash and bottom ash and added with superplasticizer of 2% of the water requirement. The planned concrete quality was 41.7 MPa at 28 days, with the sample tested at age 7, 14, 28 days. Based on the results of the highest concrete compressive strength test for fly ash concrete (fly ash) is found in FA mixture variation 10%, SP 4%, SF 2% that is equal to 56,16 MPa. And for mixed bottom ash the highest compressive strength on mixed variation of BA 5%, SF 2%, SP 2% is equal to 49,82 MPa. Fresh concrete temperature variation of FA mixture 5%, SF 2%, SP 2% and BA 5%, SF 2%, SP 2% rose one degree from normal concrete temperature. Setting time generated on mixed concrete FA 5%, SF 2%, SP 2% has the fastest initial time setting ie 251 minutes of all variations of concrete mix.

scholarly journals Effect of Remixing & Intermittent Curing Sequences on Strength of Pavement Quality Concrete

2020 ◽  
Vol 9 (4) ◽  
pp. 2000-2013
Keyword(s):  
Compressive Strength ◽  
Elastic Modulus ◽  
Flexural Strength ◽  
Fresh Concrete ◽  
Time Lag ◽  
Blend Ratio ◽  
Curing Method

The paper is concerned with determining the effect of remixing of two different grades of concrete proving blend ratio, time lag & intermittent curing sequence. Two mix designs (M40 & M50) selected and provide blend ratio (0 to infinity) at 0,30,60,90 & 120min time lag. In this research, the problem related to improper casting & curing sequence, which ultimate formation of the cold joint due to old and fresh concrete. Curing method applied with four sequences Air0 Water28, Air28 Water0, Air7 Water21, and Air21 Water7.Concrete samples were made and tested for their compressive strength, flexural strength, elastic modulus, and shrinkage properties in the laboratory. As compared to the strength of freshly prepared concretes to the hard in situ concrete tends to show a reduction in its various strengths due to improper curing & formation of cold joints. This reduction is further possible to be minimized to a certain extent on blending some quantity of a relatively fresh mix to the existing quantity of the hard in situ concrete.

Sign in / Sign up

Export Citation Format

Share Document