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Shijiazhuang, China

Li Y.,Shijiazhuang City Government | Sun Z.,Changan University | Song W.,Changan University
Advanced Materials Research | Year: 2012

A bearing capacity evaluation model of prestressed concrete bridge is established based on analytic hierarchy process. In order to determine the bearing capacity of the existing bridge condition, fuzzy evaluation method is used to evaluate material damage degree of bridge structures, in which of experience of experts can be used sufficiently. The method is evident and useful, which can reflect the prestressed concrete bridge in service effectively, improve the existing structure model and optimize the bearing capacity of synthetic evaluation. At the same time, the result is verified reasonably by an engineering example. Source


Li Y.-W.,Shijiazhuang City Government | Fan H.-C.,Shijiazhuang City Government | Chen X.-L.,Anhui Province Institute of Communications Consulting and Design | Chen X.-L.,Changan University | Zhang Z.-Q.,Changan University
Chang'an Daxue Xuebao (Ziran Kexue Ban)/Journal of Chang'an University (Natural Science Edition) | Year: 2012

In order to evaluate the compaction effect accurately, the pavement density was detected with non-nuclear density gauge to analyze the effective range of different types of road roller. Based on analyzing the rationality of current compaction effect index and the effective compaction principle, the compaction index was put forward to evaluate the pavement compaction effect. In addition, the immersion Hamburg wheel-tracking tests was done to verify the correlativity of the evaluation index and high temperature stability. The results show that the compaction index is better to evaluate the compaction quality of the asphalt pavement compared with the air voids. The compaction index have a good correlation with the rutting depth and creep rate, it can be used to evaluate the rutting performance. Source


Li R.,Changan University | Li Y.-W.,Shijiazhuang City Government | Shi X.,Shijiazhuang City Government | Wen Y.,Changan University | And 2 more authors.
Chang'an Daxue Xuebao (Ziran Kexue Ban)/Journal of Chang'an University (Natural Science Edition) | Year: 2012

To study the advantages of wood bituminous mixtures performance, the strain, stress, Poisson's ratio, and specific strength were used to evaluate the mechanical properties of wood bituminous mixtures and stone bituminous mixtures. Meanwhile, GB rebounding coefficient and absorption coefficient of wood bituminous mixtures were investigated and compared with stone bituminous mixtures in elastic properties and noise reduction performance. The results show that the stress-strain curve of wood bituminous mixtures is gentle and exhibits flexible failure. The Poisson's ratio and specific strength of wood bituminous mixtures are promoted from 60% to 80% and 10% to 20% respectively compared with stone bituminous mixtures. Furthermore, the GB rebounding coefficient and absorption coefficient of wood bituminous mixtures are from 1/9 to 1/2 and two times respectively of the ones of stone bituminous mixtures. Those show that the wood bituminous mixtures have excellent elastic properties and noise reduction performance. Source

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