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Wang Y.L.,Changan University | Wang Y.L.,Shandong Provincial Communications Planning and Design Institute | Li C.,Shandong Jiaotong University
Advanced Materials Research | Year: 2014

Two level zone index system of the provincial highway geotechnical zone was established on the basis of analysis of the relationship between geotechnical elements and highway engineering. The highway rock-soil type conversion rules and the zone standard of two level zone indexes were set through comparative analysis of the characteristics of rock-soil on the engineering geological map. According to the general principles and methods of zone study, the research framework of provincial highway geotechnical zone was constructed. Under the guidance of this framework, Shandong province highway geotechnical zone was completed and the whole research area was divided into 2 grade I and 5 grade II. The results indicate that the new highway geotechnical zone can better reflect the variation of rock-soil engineering properties in Shandong province. The result verifies the scientificalness and effectiveness of the research framework of provincial highway geotechnical zone and provides basic data for research on highway geotechnical zone of nationwide. © (2014) Trans Tech Publications, Switzerland. Source

Zhou X.-Y.,Tongji University | Zhang Y.-Q.,Tongji University | Zhang Y.-Q.,Shandong Provincial Communications Planning and Design Institute | Gu M.,Tongji University
Gongcheng Lixue/Engineering Mechanics | Year: 2014

Sliding snow loads are an important component of snow loading on roofs. A simulation method for sliding snow loads is developed in this paper. Firstly, based on previously developed mass and energy balance models, a building roof snowmelt model is developed, which focuses on the features of the snowpack. Based on this model, it is proposed that the sufficient condition for roof snow sliding is that the liquid water in the snow exceeds the maximum water capacity of snow. Using the method for calculating sliding snow load proposed in the paper, simulations of the sliding snow loads on roofs in several representative areas in China are performed, and the influences from climate features and shielding effects of neighboring buildings are analyzed. At the same time the contributions of a variety of energies to snow sliding are presented quantitatively. Source

Liu J.,Tongji University | Tu H.,Tongji University | Bi Y.,Shandong Provincial Communications Planning and Design Institute | Sun L.,Tongji University
Wuhan Ligong Daxue Xuebao (Jiaotong Kexue Yu Gongcheng Ban)/Journal of Wuhan University of Technology (Transportation Science and Engineering) | Year: 2016

Based on the analysis on limitation of present common road accident-prone location identification method and multidimensionality of road risk indicated by accident sample, information assignment technology was introduced to process traffic accident data to reduce the impact of the division of the road section on the accident rate. Besides, risk assessment was also introduced to process the safety evaluation of road section which is to make good use of the possibility of traffic accident and the loss of traffic accident to build up the road risk assessment matrix model. Finally, the method was compared with traditional road accident-prone location identification method. The conclusion is that: safety evaluation method of freeway segment based on the fuzzy information distribution method and risk assessment is more efficient and reliable, which can reflect the actual situation of road risk. So it is an effective, simple and practical method. © 2016, Editorial Department of Journal of Wuhan University of Technology. All right reserved. Source

Chen A.,Shandong Jiaotong University | Diao R.,Shandong Provincial Communications Planning and Design Institute
Applied Mechanics and Materials | Year: 2012

According to the basic principles and methods of the fuzzy reliability assessment to the existing bridge, RC rigid-frame arch bridge with Fuzzy reliability evaluation of a judgment factor sets of class I and class II are identified in this paper, aiming at the existing disease in this kind of bridge. Then, the fuzzy reliability comprehensive evaluation model of RC rigid-frame arch bridge is established. Meantime, the paper raises the membership function of each evaluation index; uses Analytic hierarchy process (AHP) to determine the weight vector of each factor. At last, a reliable practical analytical method for the evaluation of the existing RC rigid-frame arch bridge's bearing capacity is obtained. © (2012) Trans Tech Publications, Switzerland. Source

Liang X.,Shandong University of Technology | Liang X.,Changan University | Fu Y.,Shandong Provincial Communications Planning and Design Institute | Xu Y.,Changan University
Advanced Materials Research | Year: 2011

Connected with the practical construction and considering Structural properties of single-tower self-anchored suspension bridge, the multi-level safety evaluation model is established according to the main risk factor and weighting rate of risk factor is analyzed by the analytic hierarchy process. A safety assessment method with qualitative analysis and quantitative analysis is proposed based on the grey theory and fuzzy mathematics theory for the practical problem of multi-index comprehensive evaluation, and risk ranking is given. © (2011) Trans Tech Publications. Source

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