bluuebunny/crossref_metadata_2025_split huggingface dataset:
Probabilistic Assessment on Stability of Slopes Reinforced with Piles Considering Spatial Variability of Soil Properties
Authors: Chen Fuyong , Cheng Longfei , Zhou Tingqiang , Chen Xiang , Zhang Wengang 
Published: September 2019

Abstract
The spatial variability is an inherent property of soil materials, which heavily affected the failure probability of slope. In the present study, deterministic analysis with factor of safety and reliability analysis in uniform soil grounds and spatial variable soil conditions are successively carried out to investigate the effect of uncertainties and the spatial variability of soil on the stability of slope reinforced with piles using random limit equilibrium method (RLEM). The optimal location and length of pile are also analysed based on the calculation results of RLEM, which is inconsistent with the results of traditional deterministic method. The obtained results demonstrate the significant effect of the spatial variability on the failure probability of slope reinforced with pile.
Seismic behavior of perforated brick walls with HPFL strips composite ring beam and constructional column
Authors: Min Lei , Shou-ping Shang 
Published: September 2019

Abstract
The existing perforated brick masonry structures are usually lack of ring beam and constructional column. Aiming at this problem, a new method of HPFL strips composite ring beam and constructional column is proposed. Six perforated brick walls with HPFL strips composite ring beam and constructional column and two comparative walls are tested under low cycle reversed loading. The failure mode, ultimate strength, energy dissipation capacity, and ductility of the strengthened walls and the comparative walls are compared. A calculation method is proposed for predicting the seismic shear capacity of perforated brick walls with HPFL strips composite ring beam and constructional column. The results show that using this method, the cracking load, ultimate load, energy dissipation capacity and deformation capacity are improved greatly. The calculated results are in good agreement with the measured results. The calculated method can provide the reference for seismic strengthening design of the perforated brick masonry.
Vertical Seismic Response Analysis of Large Span Isolated Structures under Multi-Dimensional and Multi-Support Excitations
Authors: Gu Zhen-yuan , Sun Zhen , Xu Yi-kang , Wang Yi 
Published: September 2019

Abstract
The multi-point random ground motion is artificially synthesized based on the triangular series method. Then the variation law and damping effect of vertical seismic response of large span isolated structures with different spans are studied respectively, under the action of both frequent earthquake and rare earthquake. The results show that in some areas of large span isolated structures, the vertical seismic responses are larger than those of non-isolated structures, under the multi-dimensional multi-point seismic input. The damping effects of large span isolated structures under rare earthquake are better than those under frequent earthquake. The area that is near the supports is prone to a large increase in response after isolation, so there should be strengthened during the engineering design.
Identification and Analysis of Main Harmful Factors in Tailings pond
Authors: Li Quanming , Liu Yinkun , Zhang hong 
Published: September 2019

Abstract
Combined with the particle size classification of the tailings pond, according to the corresponding laws and regulations of the safe production process, the tailings pond is identified and analyzed from four aspects: human, material, environment and management. From the source, the possible harmful factors in the tailings pond are pointed out, which will provide reference for the safe and effective operation of the tailings pond in the future.
Study on evaluation of emergency plan for production accident
Authors: Zhou Ying , Li Feng , Liu Xixiao , Jiang Wen 
Published: September 2019

Abstract
The emergency plan assessment plays an important role in strengthening production safety accident prevention and improving the ability to respond to emergencies. This paper analyzes the causes of production accidents and the problems existing in the treatment, and combines the existing evaluation system to establish a more practical evaluation index system. Taking project A’s emergency plan as the evaluation object, the project is evaluated by rough set and gray comprehensive evaluation model. The project evaluation grade of A is optimal, and the feasibility of the program implementation needs to be further improved. This paper can evaluate the whole and part of the project more scientifically and accurately, by the establishment of the evaluation index system and method, and it has strong practicability.
Comparative Study on Calculation Methods for Stability Evaluation Based on BIM Models of Soil Landslides
Authors: Wei Cheng , Wang Jinbao , Cheng Feng 
Published: September 2019

Abstract
The purpose of landslide prevention and control is to keep the stability within a safe range. This paper proposes a new direction of landslide information prevention and control with BIM technology for soil landslide, which is a typical type of landslide. The BIM model was established by referring to the engineering geological parameters of typical soil landslides, and then several commonly used landslide stability calculations were compared and studied by using the model research method. On the basis of BIM model of typical soil landslide, the results of calculating related engineering geological problems by different stability calculation methods were verified, and the characteristics of different stability calculation methods were revealed. When several common methods were used to calculate the stability of typical soil landslides. How to select the appropriate methods for calculations is an inevitable problem whenever the stability evaluation of landslide prevention and control is carried out, so it is of important engineering value and significance for this research.
Study on the Influence of Soil Parameters Change on the Stability of Foundation Pit
Authors: Wang Yongwei 
Published: September 2019

Abstract
Combining with engineering examples, the influence of grouting on the stability of foundation pit is analyzed by comparing the parameters before and after grouting. The numerical analysis software FLAC is used to simulate the original foundation pit without grouting. The relationship between the maximum horizontal displacement and cohesion, friction angle and elastic modulus is explored. The fitting formulas of the influence of elastic modulus, friction angle and cohesion on displacement are put forward. Enclosure design provides basic data.
Study on the Influence of Dry-wet Cycle on the Pore Size of Dam Soil
Authors: Ye Wei , Ma Fuheng 
Published: September 2019

Abstract
In view of the influence of dry-wet cycle on soil structure, the suction variation of different parts of the model dam slope was obtained, and the soil-water characteristic curve was drawn accordingly. According to the soil-water characteristic curve, the pore size of soil was analyzed. Based on the assumption that the pore size of soil was a sphere, the change of pore radius in the process of drought was analyzed, and the change of pore volume in the whole process of drought was studied. The results showed that the pore volume of soil without cracks would increase in the process of drought, and the greater the influence of dry-wet cycle condition was, the more obvious the change was. The increase of pore volume would reduce the compactness of soil and threaten the safety of filling engineering.
Performance of tuned tandem mass dampers based on shape memory alloy
Authors: Chang Ke , Li Chunxiang 
Published: September 2019

Abstract
Tuned tandem mass dampers based on shape memory alloy (SMA-TTMD) are proposed in this paper. The SMA-TTMD is formed by replacing the connection damping between two mass blocks in the TTMD with a shape memory alloy spring. Firstly, the stochastic equivalent linearization of non-linear SMA is presented. It is attached to a single-degree-of-freedom structure excited by stationary filtered white noise to study the performance of SMA-TTMD. Based on the minimum displacement variance of the main structure, the structure random vibration method is used to study the optimal control performance. The effectiveness and stroke of the SMA-TTMD under the changes of mass ratios are studied, and the optimal parameters of the system are proposed. The results are compared with those of TTMD. The numerical analysis shows that the control performance of SMA-TTMD is better than that of TTMD. The results demonstrate that the stroke of SMA-TTMD is obviously superior to that of TTMD.
Study on the creep behavior of Tianjin marine soft clays and its improved Mesri model
Authors: Li Gang , Yan Zhen , Zhang Jinli , Liu Jia , Liu Rui 
Published: September 2019

Abstract
Marine soft clays are widely distributed in coastal areas. Owing to their strong creep properties, soft clay foundations undergo significant post-construction settlement, thereby affecting the life cycle of buildings. In this study, the creep behavior of Tianjin marine soft clays was investigated by consolidated-undrained triaxial creep tests. Based on the creep test results and the Mesri creep model and by treating the final clay deformation under each increment of load as the initial strain, an improved Mesri creep model that describes both the stress-strain and strain-time relationships using hyperbolic functions was established. The creep curves under various levels of cell pressure and deviatoric stress showed notable decay and stable creep characteristics but contained no accelerated creep stage. The stress-strain isochronous curves exhibited notably nonlinear characteristics. Relative to the results calculated by the Singh-Mitchell and Mesri models, the results calculated by the improved Mesri model were in better agreement with the test results, which suggests that the established model is suitable for describing the creep behavior of Tianjin marine soft clays and can provide a reference for predicting the long-term settlement of foundations.
Analysis on the Variation Rule of Aperture of the Normal Circulation Bored Pile
Authors: Wu Yan , Wang Yibo , Liu Lan , Gao Wenlong 
Published: September 2019

Abstract
The hole formation is the most important link in the construction of bored piles. The quality of the hole formation plays a decisive role in the bearing capacity of cast-in-place piles. Combined with the field measurement data of hole formation in Changzhou Science And Technology Financial Center, combined with the time factor and the buried depth factor, the pore diameter change was analyzed. At the same time, the monitoring data was compared and analyzed by means of numerical simulation. The results show that the stress releases and the pore diameter decreases with the change of depth. With the increase of time, the pore size decreases. Due to the influence of soil structure, the pore diameter shrinkage of silty sand layer is up to 12.5%, while the silty clay layer is generally relatively small, with the maximum value not exceeding 6.25%.
Experimental study on elastic modulus of concrete mortar under high temperature
Authors: Wei Jiang , Derui Huang , Kuizhou Liu , Yujie Shen , Yang LI 
Published: September 2019

Abstract
In order to study the change of elastic modulus of mortar concrete under high temperature, the mortar cube was tested at high temperature.The results show that the elastic modulus of the mortar cube is not linear with the change of temperature. The elastic modulus of the mortar decreases with the increase of temperature. When the temperature rises to 150 °C, the mortar elastic mold will have a The situation of slowing down and then falling again.
Mechanical properties of ultra-low temperature mortar stone
Authors: Kui-zhou Liu , De-rui Huang , Wei Jiang , Yu-jie Shen , Yang Li 
Published: September 2019

Abstract
In order to study the mechanical properties of concrete materials in the normal operation phase of LNG tanks, the longitudinal strain of the loading direction and the transverse strain of the vertical loading at the corresponding temperature were measured by using the resistance strain gauge test technique. The elasticity of the mortar block and stone in the ultra-low temperature environment was studied. Modulus, Poisson’s ratio and shear modulus are respectively related to temperature. The results show that the Poisson’s ratio of stone and mortar is not obvious with temperature, which can be considered as a fixed value; the elastic modulus and shear modulus of mortar block increase linearly with the decrease of temperature, and the elastic modulus and shear modulus of stone The temperature decrease is a quadratic function relationship of decreasing first and then increasing. The elastic modulus and shear modulus of the stone are all the smallest at around -60 °C. It is concluded that the concrete material has better mechanical properties than the normal temperature environment in the ultra-low temperature environment, and can be used to further improve the design and construction of the LNG tank.
Study on the Effects of Joint Inclination and Size Effect on the Failure Process of Rock-like Materials
Authors: tao Dong , ping Cao , Zhizhen Liu , fei Wang 
Published: September 2019

Abstract
To explore the effects of joint inclination angle and the size on the mechanical properties and failure process of rock-like specimens, a series of uniaxial compression tests were carried out on rock-like specimens.The specimens are consist of two sizes and contain three parallel joints with various inclination angles. During testing, the variation characteristics of apparent strain field of specimens is recorded by digital image correlation (DIC) system. Testing results reveal the uniaxial compression strength of the specimen decreases gradually with the joint inclination increases from 0° to 60°, while increasing gradually with the joint inclination increases from 60° to 90°. In addition, the peak compression strength of the large-size specimens is obviously lower than that of the small-size specimen when the joint inclination angle is 0°~30°. By contrast, the peak compression strength of the large-size specimens is the same as that of the small-size specimen when the angle is 30°~60°, approximately. But, the peak compression strength of large-size specimen is obviously higher than that of small-size specimen when the joint inclination angle is between 60° and 90°. Finally, five different types of cracks are observed in this work, i.e., tensile crack,airfoil tension crack,pull-shear mixing crack,secondary crack and far field tensile crack.
Experimental Study on Thermal Conductivity of Sand Solidified by Microbially Induced Calcium Carbonate Precipitation
Authors: Ding Jinhua , Wang Zhaoyu , Zhang Nan , Jiang Pengming , Peng Mingxing , Jin Yong , Li Qi 
Published: September 2019

Abstract
Soil thermal conductivity is relatively low in low saturation ranges in arid regions, resulting in low heat transfer efficiency of ground source heat pump (GSHP) systems. In this study, thermal conductivity of sand solidified by microbially induced calcium carbonate precipitation (MICP) was measured at different saturation levels. The test results reveal that the thermal conductivity of MICP treated sand increases with the increase in saturation degree (Sr), and the increasing rate gradually decreases. Use of the MICP technique not only increases the thermal conductivity of sands, but also reduces the influence of saturation degree on sand thermal conductivity when Sr is less than 0.22. This study provides a new research direction for the MICP technique and a technical reference for GSHP applications.
Experimental Study on The Effect of Cement-Lime Double Admixture on Dewatering and Strength of Sludge
Authors: Peng Cheng , Tian Zongkun , Tan Yuqing , Long Hui 
Published: September 2019

Abstract
Cement and lime are mixed into the sludge in different ratios to analyze the effect of curing agent on sludge dewatering and the dehydration rate, improve the strength of sludge, and promote the application of sludge in water conservancy and geotechnical engineering. The solidified sludge was subjected to test of moisture content and direct shear test to study the dewatering effect and strength characteristics of the improved soil. It was found that the precipitation and dehydration rate of solidified sludge were related to the ratio of curing agent incorporation. The higher the incorporation ratio is, the more obvious the dehydration effect is, and the maximum reduction value of dehydration is 13%. The sample’s dehydration rate is from the large to the small, and the average precipitation rate of 0-12h is 2-6 times than that of 12-72h. With the increase of the dosage of curing agent, the cohesion of solidified soil increases obviously, and its range of variation is between 32 and 77kPa. The internal friction angle of the sample increases with the increase of cement content, but fluctuates slightly under the action of lime. After comprehensive consideration of dehydration effect, shearing strength parameters and economic benefits, the optimal ratio of cement and lime to modified sludge soil can be controlled at 10% and 10%, respectively.
Experimental study of five element creep model for high salt saturated fine sand soil
Authors: Zhang Guoqi , Wu Yaping , Cheng Gaojun 
Published: September 2019

Abstract
A series of creep tests on high salt saturated fine sand under different stress and salt content were carried out by uniaxial compression test. Based on the classical K-H body model of three elements and the Bu body model of four elements on the linear viscoelastic plasticity theory, a creep model of five elements under the consideration of the comprehensive effect of salt water soil is proposed combined with the experimental analysis results under different stresses and salt content. The analysis results show that the creep model of the five element can fit well the creep law of high salinity fine sand under different stress and salt content, and the validity of the model is proved by comparing the three models and comparing the experimental data with the fitting results.
Study on optimum design and repair of fair-faced recycled concrete
Authors: Fang Xiaojun , Fang Guangxiu , Liang Xiaoxu , Hu Pengjie , Jin Xianze 
Published: September 2019

Abstract
Guided by strategies for renewable resources and sustainable development, in the mix ratio design of the fair-faced recycled concrete, use broken waste concrete test blocks, and replace natural coarse aggregate by 40 % equal amount. The optimum dosage of water reducer and foaming agent was 1.33 % and 1.5 % respectively, and the optimal match ratio was put forward. At the same time, the improved vibration technology is proposed to treat the quality of surface air bubbles and holes in fair-faced recycled concrete. Finally, using the scale model of bridge structure and the reserved Honeycomb and hemp surface, the repairing technology of fair-faced recycled concrete is studied, which is an effective treatment of construction quality disease, providing reference for the design and repair of fair-faced recycled concrete.
Study on conductive mechanism of graphene conductive and anticorrosive coatings on steel bar surface in concrete
Authors: Zhang Xingduo , Sun Hongyao , Qian Benlei , Sun Gaoxia 
Published: September 2019

Abstract
When conductive and anticorrosive coatings are applied on the surface of reinforcing bars, electrochemical protection measures can be taken when the construction need secondary maintenance. Because graphene is a sp2 hybrid honeycomb structure, higher conductivity can be obtained by adding a small amount of graphene in the coating. In this paper, graphene-based conductive anticorrosive coatings were prepared with mixed conductive fillers (acetylene carbon black, conductive carbon black, graphite, graphene and zinc powder). The conductive mechanism was determined by studying the effects of conductive properties on the change of the content of different conductive fillers and analyzing the microstructural characteristics of conductive coatings with XRD, SEM, TEM and Raman spectroscopy tests. The results show that the conductivity of mixed fillers with different shapes in coatings is better than that of single filler in coatings when the filler content is the same. Because of the flexible structure and thin layer of graphene, the isolated fillers and conductive paths in different areas of the coatings can be connected with it and the conductive efficiency can be improved. The conductive paths are formed by the contact among conductive fillers in the coatings. Finally, the conductive mechanism model of graphene conductive and anticorrosive coatings was established.
Numerical simulation for the matching effect of rock parameters on explosives and rocks
Authors: Li Tingting , Niu Xuefeng , Fei Aiping , Zhu Chunyu , Wang Mingchang 
Published: September 2019

Abstract
China’s mine blasting technology is gradually mature, but there are deficiencies in low blasting efficiency. The reasonable matching of explosives and rocks can effectively improve the blasting efficiency and is of great significance for mine blasting. Based on ANSYA/LS-DYNA, the matching effects of rock physical density, elastic modulus, Poisson’s ratio, compressive strength and shear modulus in double-hole blasting were studied and verified by simulation. By comparing the length of time that the shock wave caused the rock to be crushed, the experiment shows that the longer the blasting time, the better the matching effect. Numerical simulations show that the five physical factors affecting the matching effect of explosives and rocks are: compressive strength, Poisson’s ratio, density, shear modulus, and elastic modulus. It has been verified that the experimental results can provide reference for the development of blasting technology.
Fences Application of the CATIA Program in Architecture and Construction
Authors: Tubielewicz-Michalczuk Malwina 
Published: September 2019

Abstract
Nowadays, modern computer programmes are widely used in the design process. Information technology provides designers with the tools for extending and facilitating creative practices. Computer programmes offer a modern approach to the architectural design process, help maintain control over it and ensure the accuracy of documents. The use and application of CATIA, increasingly chosen as support for design activities, has been discussed in the paper. Both key features to create the surface geometry of the model and the analyses of extremely complex shapes have also been demonstrated.