American Journal of Civil Engineering

Volume 7, Issue 1, January 2019

  • Concept of Value Engineering and Current Project Management Practice in Ethiopian Building Construction Projects

    Tsigereda Garomsa, Elmer De Castro Agon, Sintayehu Assefa

    Issue: Volume 7, Issue 1, January 2019
    Pages: 1-8
    Received: 30 December 2018
    Accepted: 12 February 2019
    Published: 27 February 2019
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    Abstract: In construction projects, when one-program costs more than planned, decision makers are forced to delay or cancel other activity. Value Engineering can play a key role in overcoming such problems by ensuring programs stay within project duration, estimated budget and saving costs. This study was conducted to assess the applicability of value engine... Show More
  • Development of a Self-balanced Rock True Triaxial Compression Instrument

    Tang Yanchun, Wang Yue, Liu Ruilong, Zhou Hui, Mao Qingfeng

    Issue: Volume 7, Issue 1, January 2019
    Pages: 9-16
    Received: 25 December 2018
    Published: 8 March 2019
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    Abstract: Based on the analysis of the structure and the performance of similar instruments at home and abroad, a Self-balanced Rock True Triaxial Compression instrument (SRT) was developed. For SRT, complex stress realization, based on three-dimensional stress alone control and change; and the self-balanced structure is adopted on the basis of frame design,... Show More
  • Production of Lightweight Concrete Using Corncob Ash as Replacement of Cement in Concrete

    Sintayehu Assefa, Mamaru Dessalegn

    Issue: Volume 7, Issue 1, January 2019
    Pages: 17-20
    Received: 11 February 2019
    Accepted: 11 March 2019
    Published: 25 March 2019
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    Abstract: One of the biggest issues, all over the world is getting affordable house to the community. In developing countries, where it is difficult for most people to satisfy basic needs, construction of modern house is a big challenge. Different ways were tried by researchers and scholars to find alternative construction materials. One of this is replacing... Show More
  • A Logistic Model Predicting Occurrence Probability of Debris Flow

    J. P. Wang, Yijie Wu

    Issue: Volume 7, Issue 1, January 2019
    Pages: 21-26
    Received: 17 January 2019
    Published: 28 April 2019
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    Abstract: This paper presents a logistic model for predicting the occurrence probability of debris flows based on rainfall intensity and duration. The data from a total of 354 rainfall events were used to calibrate the model, among which 249 were triggering a debris flow while 105 were not. The model will be useful to the decision making of debris flow early... Show More
  • Rules Regulating the Change in Physiological Parameters of Rats Under Simulated Microgravity and Different Ambient Temperatures

    Jie Qian, Gengxin Xie, Jie Zheng, Bo Duan, Yajun Cao, Xi Wang, Fengjie Li, Changpeng Hu

    Issue: Volume 7, Issue 1, January 2019
    Pages: 27-34
    Received: 18 January 2019
    Published: 28 April 2019
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    Abstract: To investigate the rules regulating changes in mean chest temperature (MCT), mean rectal temperature (MRT) and mean body weight (MW)in rats at simulated microgravity and different ambient temperatures (ATs). The −30º rat tail suspension (TS) method was used to simulate microgravity over a 7 day period at 18°C, 20°C, 23°C and 26°C AT through compari... Show More
  • The Finite Element Analysis of the Differential Settlement Prediction for the Adjacent Longitudinal Precast Box Culvert

    Zenagebriel Gebremedhn, Jilong Li, Guofu Qiao

    Issue: Volume 7, Issue 1, January 2019
    Pages: 35-40
    Received: 14 March 2019
    Published: 28 April 2019
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    Abstract: This paper presents the finite element analysis of the differential settlement prediction for the adjacent longitudinal precast box culvert and subject to different loading conditions including different loading area. These culverts were investigated based on the finite element method was used to analyze the numerical solution of the problems under... Show More