Now showing items 421-440 of 742

    • Three-dimensional Detection Method for Bridge Surface Defects Based on Line-shaped Lasers 

      Yu Yong-bo; Li Wan-heng; Zhang Jin-quan; Nie Jian-guo (American Society of Civil Engineers, 2013)
      The measurement and description of the three-dimensional (3D) parameters of bridge surface defects are common technical problems in the field of bridge defect detection. These problems are difficult to solve through ...
    • Retroreflectivity and Deterioration Characteristics of Sheeting Used for In-Service Guide Signs 

      Huang Wen-hong; Hu Li-qin; Jiang Ming (American Society of Civil Engineers, 2013)
      To determine the deterioration characteristics of the retroreflective sheeting used for guide signs, this study examined 12-year (1998–2010) observation data on 230 guide signs located in a test square. On the basis of the ...
    • Experimental Analysis of Stress in Cement Concrete Pavement with Base Cracks 

      Li Jin-feng; Tian Bo; Niu Kai-min; Hu Guang-wei; Li Yong-xu (American Society of Civil Engineers, 2013)
      In order to analyze the stress varieties in cement pavement slabs caused by load with the existence of base cracks, the influences of moduli, crack locations and quantities of semi-rigid base and lean concrete base, thickness ...
    • Fatigue Performance of Warm Recycled Asphalt Mixture 

      Yang Li-ying; Tan Yi-qiu; Dong Yu-ming; Li En-guang (American Society of Civil Engineers, 2013)
      The mix of warm and hot recycled asphalt mixtures were determined after reclaimed asphalt mixture (RAP) analysis and mix design. With similar aggregate gradation, the RAP content in warm recycled asphalt mixture increased ...
    • Study on the Thawing Compression Deformation Mechanism of Ice-Rich Frozen Soil 

      Jin Long; Wang Shuang-jie; Chen Jian-bing; Duan Kang-jin (American Society of Civil Engineers, 2013)
      Current theories on the thawing compression of frozen soil exhibit a number of inadequacies because of the failure to consider the effect of moisture. Considering the effect of temperature coupled with moisture and stress ...
    • Cement Mortar Liquidity Testing Method by Rheological Properties 

      Zheng Shao-peng; Tian Bo; Wang Da-peng; Hou Zi-yi (American Society of Civil Engineers, 2013)
      A cement mortar mixer that can test torque is designed to realize online observation of working performance of the cement mortar and to predict cement mortar slump. The influence of different rotating speeds and mixing ...
    • A Multidisciplinary Optimal Design for the Section Dimensions of a Side Impact Bar Made of Ultra High-Strength Steel 

      Gao Da-wei; Qin Xiao (American Society of Civil Engineers, 2013)
      The original material of the side impact bar is replaced with ultra high-strength steel. The section dimensions of the side impact bar are considered as design varieties, and its minimum weight is considered as the ...
    • Impact of Surface Temperature on Fatigue Damage in Asphalt Pavement 

      Wei Lu; Kayser Sascha; Wellner Frohmut (American Society of Civil Engineers, 2013)
      To evaluate the anti-fatigue performance of asphalt pavement affected by temperature and solve the problem of an inaccurate estimation of fatigue damage by adopting a single fixed temperature, the impact of different surface ...
    • Coordination Mechanism of Transportation-inventory Model in Fuzzy Environment 

      Wang Yu-hui; Yang Li (American Society of Civil Engineers, 2013)
      For the system coordination of transportation-inventory problem in the presence of uncertainty in customer demand, inventory cost, and lead time, this paper, from the point of optimizing logistics cost, establishes the ...
    • Economic Analysis of Self-supporting and Outsourcing Logistics in Manufacturing Enterprise 

      Zhao Fang; Ma Hong sheng; Zhang Jin (American Society of Civil Engineers, 2010)
      The influence on economic benefit under the condition of self-supporting logistics, outsourcing logistics or both concomitant patterns in manufacturing enterprise was analyzed by introducing the logistics outsourcing proportion
    • Seismic Design for Bridges with Short Piers in High Earthquake Intensity Zones 

      Li Xiao-li; Sun Zhi-guo; Wang Dong-sheng (American Society of Civil Engineers, 2013)
      Aimed at short bridge piers that are vulnerable to brittle shear failure in high earthquake intensity zones, seismic design countermeasures for bridges with short piers were put forward in combination with the Guidelines ...
    • Post-rehabilitation Cable Force Adjustment of the Tension Rocker Bearing in a PC Cable-stayed Bridge 

      Chen Yun-hai; Li Hong-jiang; Lü Jian-ming (American Society of Civil Engineers, 2013)
      Taking the maintenance of a PC cable-stayed bridge as the background, a simulation and calculation analysis of construction control was conducted, and the scheme of stay cable force adjustment was optimized using GQJS ...
    • Determination Method for Damaged Concrete Strength 

      He Hai-fang; Zhang Jin-quan; Cheng Shou-shan (American Society of Civil Engineers, 2013)
      This study aims to reflect the original strength of concrete material objectively and accurately by determining the concrete damage degree quantitatively and identifying the relation between damage variable and strength. ...
    • Mechanism Analysis of Subgrade Frost Heaving in Seasonally Frozen Regions 

      Wang Shu-juan; Chen Zhi-guo; Qin Wei-jun; Yu Li-mei (American Society of Civil Engineers, 2013)
      To elucidate the frost heaving mechanism of subgrade, as well as reduce cracking, subsidence, and mudding due to water freezing and thawing in seasonally frozen regions, temperature sensors were embedded in the subgrade ...
    • Reasonable Reinforcement Ratio of CRC+AC Composite Asphalt Pavements 

      Li Sheng; Li Yu-zhi; Liu Zhao-hui (American Society of Civil Engineers, 2013)
      The longitudinal reinforcement design was analyzed under current specifications of cement concrete pavement design for highway, considering the structural characteristics and limitations of existing studies on continuously ...
    • Experiment of Tension-compression Fatigue and Damage for Asphalt Mixtures 

      Qian Guo-ping; Liu Hong-fu; Zheng Jian-Iong; Jiang Li-jun (American Society of Civil Engineers, 2013)
      A tension-compression beam fatigue test under continuous sine wave alternating loading for AC-13 was conducted to understand fatigue damage characteristics of an actual asphalt pavement structure under tension and compression ...
    • Performance Optimization Method of Composite Modified Asphalt Sealant 

      Tan Yi-qiu; Guo Meng; Zhang Lei; Cao Li-ping (American Society of Civil Engineers, 2013)
      Central composite design-response surface methodology was used to determine the best content of raw materials and improve the performance of hot-poured bituminous sealant. Content range and process technology were studied ...
    • Nonlinear Aerostatic Response of Catwalk of Suspension Bridge 

      Wang Jie; Li Yu; Liu Jian-xin; Li Jia-wu; Lei Jun-qing (American Society of Civil Engineers, 2013)
      In order to make the study of aerostatic response of suspension bridge catwalk more realistic, the FEA (Finite Element Analysis) model of the catwalk of Lishuihe grand suspension bridge was established based on the FEA ...
    • Analysis of Seismic Active Earth Pressure on Retaining Walls Based on Pseudo-dynamic Method 

      Ruan Xiao-bo; Yu Ru-liang; Sun Shu-lin (American Society of Civil Engineers, 2013)
      To examine the seismic active pressure on retaining walls, the pseudo-dynamic method is adopted in deducing the formulas of seismic active earth pressure. The critical rupture angle is analytically solved on the basis of ...
    • Research on Skid Resistance and Noise Reduction Properties of Cement Concrete Pavements with Different Surface Textures 

      Liu Ying; Tian Bo; Niu Kai-min (American Society of Civil Engineers, 2013)
      The present study discusses the use of the new windscreen pavement/tire noise testing method and the lateral friction coefficient test vehicle to test the skid resistance and noise reduction properties of cement concrete ...