scholarly journals Fatigue Models for Airfield Concrete Pavement: Literature Review and Discussion

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6579
Author(s):  
Jie Yuan ◽  
Wenhao Li ◽  
Yuening Li ◽  
Lukuan Ma ◽  
Jiake Zhang
Keyword(s):  
Regression Analysis ◽  
Literature Review ◽  
Calculation Method ◽  
Concrete Pavement ◽  
Civil Aviation ◽  
Wheel Load ◽  
Stress Calculation ◽  
Analysis Process ◽  
Fatigue Model ◽  
Data Source

The fatigue model plays an important role in the mechanistic–empirical design procedure of airfield pavement. As for cement concrete pavement, the fatigue model represents the relationship between the stress and the number of load repetitions. To further understand the fatigue model, a literature review was performed in this paper along with the discussion. In this paper, the developed fatigue models available now were classified as the full-scale testing-based fatigue model and the concrete beam testing-based fatigue model, according to the data source. Then, the regression analysis process and stress calculation method of each fatigue model were summarized. Besides, the fatigue model proposed by the Federal Aviation Administration (FAA) was compared with the fatigue model of the Civil Aviation Administration of China (CAAC). The design thicknesses using the two models were obtained based on the finite element analysis. The results show that the designed slab using the fatigue model of FAA is thicker than that of CAAC, meaning that the fatigue model of FAA is comparatively conservative. Moreover, it can be concluded that the differences in the slab thickness become more significant with the increase in the wheel load and the foundation strength. Finally, the recommendation was proposed to refine the fatigue model in the future study from three aspects: data source, stress calculation method, and regression analysis process.

scholarly journals A THERMAL STRESS CALCULATION METHOD OF CONCRETE PAVEMENT BASED ON TEMPERATURE PREDICTION AND FEM ANALYSIS

2016 ◽  
Vol 72 (3) ◽  
pp. I_105-I_113 ◽  
Author(s):  
Tatsuo NISHIZAWA ◽  
Masashi KOYANAGAWA ◽  
Yasushi TAKEUCHI ◽  
Kazuyuki KUBO ◽  
Toru YOSHIMOTO
Keyword(s):  
Thermal Stress ◽  
Calculation Method ◽  
Fem Analysis ◽  
Concrete Pavement ◽  
Temperature Prediction ◽  
Stress Calculation

Stress Analysis of Cement Concrete Pavement under Overweight Loads

2012 ◽  
Vol 446-449 ◽  
pp. 949-953
Author(s):  
Ya Ni Lu ◽  
Tao Li Xiao
Keyword(s):  
Finite Element ◽  
Regression Analysis ◽  
Finite Element Model ◽  
Element Model ◽  
Concrete Pavement ◽  
The Other ◽  
Tension Stress ◽  
Statistical Regression ◽  
Cement Concrete ◽  
Cement Concrete Pavement

Special load has produced serious damage to the concrete pavement because of the great gross weight and heavy axle load, but the present specification has not mentioned this kind of load. On this occasion, Several conditions of critical load are identified through ANSYS finite element model analysis and the formula through statistical regression analysis to the bottom maximum tension stress is drawn up. Which can not only guide the concrete pavement design under the special load but also the result may be referred by the other kinds of engineering.

Numerical calculation of crack width in prestressed concrete beams with bond-slip effect

2019 ◽  
Vol 15 (2) ◽  
pp. 523-536
Author(s):  
Jinliang Liu ◽  
Yanmin Jia ◽  
Guanhua Zhang ◽  
Jiawei Wang
Keyword(s):  
Numerical Calculation ◽  
Numerical Model ◽  
Prestressed Concrete ◽  
Calculation Method ◽  
Crack Width ◽  
Calculation Model ◽  
Content Type ◽  
Bond Slip ◽  
Stress Calculation ◽  
Bonding Performance

Purpose The calculation of the crack width is necessary for the design of prestressed concrete (PC) members. The purpose of this paper is to develop a numerical model based on the bond-slip theory to calculate the crack width in PC beams. Design/methodology/approach Stress calculation method for common reinforcement after beam crack has occurred depends on the difference in the bonding performance between prestressed reinforcement and common reinforcement. A numerical calculation model for determining the crack width in PC beams is developed based on the bond-slip theory, and verified using experimental data. The calculation values obtained by the proposed numerical model and code formulas are compared, and the applicability of the numerical model is evaluated. Findings The theoretical analysis and experimental results verified that the crack width of PC members calculated based on the bond-slip theory in this study is reasonable. Furthermore, the stress calculation method for the common reinforcement is verified. Compared with the model calculation results obtained in this study, the results obtained from code formulas are more conservative. Originality/value The numerical calculation model for crack width proposed in this study can be used by engineers as a reference for calculating the crack width in PC beams to ensure the durability of the PC member.

scholarly journals ANALYSIS OF COST OF SALES AND SALES ON NET INCOME

2021 ◽  
Vol 9 (1) ◽  
pp. 133
Author(s):  
Muchamad Pahmi Ramdhani
Keyword(s):  
Regression Analysis ◽  
Literature Review ◽  
Hypothesis Test ◽  
Linear Regression Analysis ◽  
Financial Statements ◽  
Multiple Linear Regression Analysis ◽  
Net Income ◽  
Test Analysis ◽  
Retail Trading ◽  
The Cost

This study aims to analyze The cost of sales and sales of net income in retail trading companies listed on the Bursa Efek Indonesia. The population and sample in this study are the financial statements of 12 retail trading companies listed on the Bursa Efek Indonesia for the period 2016-2018. This research technique uses classic assumption test, multiple linear regression analysis, hypothesis test and determination coefficient test. The collection technique uses the documentation and literature review methods. And after the data was collected, the test analysis in this study was carried out with the help of IBM SPSS 26 for Windows. Based on the results of the F test that The cost of sales and sold together has a simultaneous effect on net income in 12 retail trading sub-sector trading companies listed on the Bursa Efek Indonesia.

scholarly journals Inpatient Patient Satisfaction Influenced By Core Service Quality And Peripheral Service Quality (Study At Dr. SOEGIRI Hospital In Lamongan Regency)

2021 ◽  
Vol 12 (2) ◽  
pp. 98-103
Author(s):  
Mesra Surya Ariefin
Keyword(s):  
Regression Analysis ◽  
Patient Satisfaction ◽  
Linear Regression ◽  
Literature Review ◽  
Service Quality ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Review Analysis ◽  
Core Service ◽  
Quality Study

This study aims to examine and analyze the effect of core service qualityand peripheral service quality on Patient Satisfaction at RSUD Dr.Soegiri Lamongan. The number of samples in this study were 36patients RSUD Dr. Soegiri Lamongan. Data collection techniques usingquestionnaires, interviews, and literature review. Analysis of the data inthis study is multiple linear regression analysis using SPSS 26 software.The results of this study indicate that core service quality and peripheralservice quality have a significant effect on Patient Satisfaction inpatientDr. Soegiri Lamongan in parallel or simultaneously

scholarly journals Implementation of Industrial Based Islamic Education Management in Pesantren Darussalam Al-Fatah Cilacap

2021 ◽  
Vol 4 (1) ◽  
pp. 630-641
Author(s):  
Guntur Dwi Purwanto ◽  
Mohammad Ulyan ◽  
Abdul Basit
Keyword(s):  
Literature Review ◽  
Industrial Revolution ◽  
Boarding School ◽  
Boarding Schools ◽  
Islamic Education ◽  
Educational Management ◽  
Education Management ◽  
Qualitative Descriptive ◽  
Data Source ◽  
Descriptive Approach

Educational management is an important reference in the management of industrial-based Islamic boarding schools. When the management of a leader must go through several things, including planning, organizing, and planning industry-based learning. This research includes a qualitative descriptive approach to da'wah management. The data source used in this research is a literature review. Collecting data in this study using observation, interviews, and documentation. Islamic boarding school Darussalam Al-Fatah Cilacap is an industry-based Islamic boarding school. This was done to follow developments in the industrial revolution 4.0. Therefore, researchers feel it is important for the management of Islamic education at the Darussalam Al-Fatah Islamic boarding school in Cilacap. The results of the application of Islamic education management include, a) soroggan, with the bin-nazhr method, the tahfidz method, the talaqqi method, and the tikrar method, b) taddabur, c) habituation of the Hasbanah and Isyraq prayers, d) rewards for students, e ) the application of industrial learning, and f) the benefits of evaluating industry-based learning at the Darussalam Al-Fatah Cilacap Islamic boarding school.

scholarly journals Analysis of Small Components and Unknown Species in Dye Mixture by Different Calculation Method of Regression Analysis

2007 ◽  
Vol 56 (5) ◽  
pp. 349-354 ◽  
Author(s):  
Akira MATSUSHITA ◽  
Shuji OKUYAMA ◽  
Toshiyuki MITSUI ◽  
Yukihiro OZAKI
Keyword(s):  
Regression Analysis ◽  
Calculation Method ◽  
Unknown Species

PENGGUNAAN DIKSI PADA BERITA ONLINE DETIK.COM

Buana Bastra ◽  
2021 ◽  
Vol 5 (1) ◽  
pp. 49-53
Author(s):  
Pitaloka Wibawani Puspa ◽  
Luluk Isani Kulup
Keyword(s):  
Data Analysis ◽  
Human Life ◽  
Online News ◽  
Research Approach ◽  
Word Choice ◽  
Language Function ◽  
Research Focus ◽  
Descriptive Research ◽  
Analysis Process ◽  
Data Source

Language is of vital importance matter in human life. One of language function is to communicate. Along growth and advancement of technology, form of communication alsofollows expand and growing sophisticated. In other hand, can also getting the quickerinformation pass by internet that is from online news. Background this Research overshadows by existence of irrelevancy the usage of diction (word choice) that used by at onlinenews. As for research focus this is about diction (diction choice) at Detik.com online news?.Research Target this is describe the usage of diction (word choice) at Detik.com online news.By using descriptive research approach qualitative, this research takes data of have the shapeof phrase or sentence related to diction (word choice), whereas data source at research this isthe set of Detik.com online news. data collecting technique as used in research this is thedocumentation with steps collect online newses and then read citation from news referred as.At technique of data analysis, process of data of analysis have the shape of accurate dataobtained/got, classifying and coding data, interpret data, and conclude data. Base result ofdata analysis and discussion, can be concluded that existed some inaccurates in the usage ofdiction at Detik.com online news, that is at meaning connotative, synonym, antonym, publicword, special word, and foreign word.

A rapid stress calculation method for short flexspline harmonic drive

2019 ◽  
Vol 36 (6) ◽  
pp. 1852-1867 ◽  
Author(s):  
Shuang Wang ◽  
Gedong Jiang ◽  
Xuesong Mei ◽  
Chuang Zou ◽  
Xian Zhang ◽  
...  
Keyword(s):  
Finite Element ◽  
Calculation Method ◽  
Circumferential Stress ◽  
Element Model ◽  
Analytical Relationship ◽  
Analysis Method ◽  
Content Type ◽  
Stress Calculation ◽  
Mechanics Analysis ◽  
Rapid Calculation

Purpose Because of the compact structure, short flexspline (FS) harmonic drive (HD) is increasingly used. The stress calculation of FS is very important in design and optimization of HD system. This paper aims to study the stress calculation methods for short FS, based on mechanics analysis and finite element method (FEM). Design/methodology/approach A rapid stress calculation method, based on mechanics analysis, is proposed for the short FS of HD. To verify the stress calculation precision of short FS, a complete finite element model of HD is established. The results of stress and deformation of short FS in different lengths are solved by FEM. Findings Through the rapid calculation method, the analytical relationship between circumferential stress and length of cylinder was obtained. And the circumferential stress has proportional relation with the reciprocal of squared length. The FEM results verified that the rapid stress calculation method could obtain accurate results. Research limitations/implications The rapid mechanics analysis method is practiced to evaluate the strength of FS at the design stage of HD. And the complete model of HD could contribute to improving the accuracy of FEM results. Originality/value The rapid calculation method is developed based on mechanics analysis method of cylinder and equivalent additional bending moment model, through which the analytical relationship between circumferential stress and length of cylinder was obtained. The complete three-dimensional finite element model of HD takes the stiffness of bearing into consideration, which can be used in the numerical simulation in the future work to improve the accuracy.

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