Volume 4 Issue 3
Authors: Rajeev S. Kale; Sunil Kute
Abstract: Optimal proportions of concrete mix ingredients are vital for establishing a relationship between the best particle distribution and the corresponding degree of packing. The maximum strength is attained when the porosity of the granular structure is minimal to the minimum voids ratio. Concrete is a particulate material, and the particle-packing theory has significance when designing a concrete mix. The objective of this work was to produce an optimum concrete mix of required design stipulations based on combinations of optimized aggregate grading and effective estimation of the required water and cement. The present work investigated the potential of the particle-packing phenomenon to optimize the cement and water content and improve concrete properties with an “aggregate to paste” approach.
Keywords: Concrete; Concrete Mix Design; Trial Batch; Computer Aided Design; Optimum; Packing; Concrete Technology
Authors: Heng Zhang; Xiao-Li Wang; Yang Zhou
Abstract: Optimizing information management play an important role in safeguarding administrative functions for city government. Meanwhile, integrating service data with fundamental geographic data is an important way to construct digital city. This article focuses on the geographic visualizing methods of several important municipal data, which improve the operable of digital city construction.
Keywords: Digital City; Smart City; Geographic Information System; Geographic Visualizing; Municipal Data Processing
Authors: Can Zhang; Jing-Jing Hu; Hai-Feng Bi; Jia-Yun Xu; Zai-Tian Ke
Abstract: Based on Shuo-huang railway line, we use the direct method, filtering and spectral density methods to calculate and analyze the measured results. It is verified that the environmental vibration intensity caused by heavy-haul train decreases with increasing distance while increases in the axis orbit distance. When the horizontal vibration acceleration level is smaller than the vertical vibration acceleration level, though its effects on the human body can be ignored; the vibration acceleration level acquired by filtering method can fairly reflect the environment vibration influences which provide a reference for environmental vibration assessment, also provide isolation vibration reduction design of structures along the railway with rules.
Keywords: Heavy-haul Train; Environment Vibration; The Vibration Acceleration; Evaluation Method
Authors: Wei Wang; Bo Wang; Ji-Yuan Liu; Hong Hai
Abstract: Based on the existing constitutive model of shape memory alloys (SMA), as well as on the state of stress distribution between the pipe and pipe joint, a simplified constitutive model for SMA can indeed fit the SMA pipe coupling structure. Using this constitutive model to simulate the stress distribution during the process of heating up, we can use the system to discuss the relationship between the radial compressive stress and various influencing factors.
Keywords: Shape Memory Alloys; Constitutive Model; Radial Compressive Stress; Pipe Joint; Wall Thickness
Authors: Fei Chen; Wei Lu; Jun Cai
Abstract: Coastal open space is an important public place where people take various activities, and it plays a great role in urban culture and leisure. Dalian Davos International Conference Center completed in 2012 has become new urban landmark owning to its high exquisite architectural design and vast marina square, and all these exhibit the urban modern features. As the focus area of Dalian East Port renewal area, the Dalian Davos International Conference Square provides leisure space for citizens. But it is generally thought that the traffic is not convenient for local residents in this area. In order to clarify this issue, an special investigation for the local residents’ daily activities traffic survey carry out. Based on the survey data, the author analyses the traffic characteristics of the public in the square. The paper points out that the Davos Square traffic inaccessibility is related to the remote geographical location, lacked public transport service and interlaced road pattern etc.
Keywords: Traffic Accessibility; Traffic Survey; Davos Square