bluuebunny/crossref_metadata_2025_split huggingface dataset:
Finite Element Analysis of Flexural Behaviour of Cold-formed Thin-Walled Steel Composite Wall for Building Cladding
Authors: Di Yanqiang , Zhang Yuxia , Li Guohua , Zhang Zhijie , Wang Quan , Li Mengying 
Published: March 2020

Abstract
In this paper, finite element software ABAQUS was used to analyze the shear performance of cold-formed thin-walled steel composite walls. In the model construction, the plastic shell element is used, and the tapping screw is coupled and bound. The correctness of the finite element model is verified by analyzing the test results of two types of composite walls: light steel keel + fiber cement slab and light steel keel + fiber cement slab + light concrete. The influence of the number of webs on the composite wall is also analyzed. The parameter analysis shows that the more webs there are, the greater the bending stiffness of the wall will be.
A Study on the Mechanical Behavior and Statistical Damage Constitutive Model of Mudstone under Low Confining Pressure
Authors: Chen Kai , Guo Zhenyu , Zhu Cunxian 
Published: March 2020

Abstract
Firstly, Triaxial compression test of mudstones under low confining pressure is conducted to study deformation behaviors and mechanical properties. Then, assumed that the strength of micro-elements fits power function distribution, this paper determines a damage variable and establishes a damage constitutive model which effectively reflects the residual strength in the process of rock failure. Meanwhile, using testing data is to validate the reliability of the proposed model in this paper. Finally, impacts caused by statistic parameters variation on compression strength are analyzed comprehensively. These research outcomes presented in this paper also can effectively offer significant reference for the development of rock mechanics and rock engineering.
Experimental Research on Filtration Effect of Mesh Filters in Dewatering of Silt Foundation
Authors: Zhang Canhong , Ji Enyue , Wang Baotian , Yang Zhanmin 
Published: March 2020

Abstract
The filtration effect of four different filter structures is studied. These four designed filters are used in three different dry densities silt sand. The four filters are: 1) without filter; 2) 80 mesh single-layer filter structure; 3) 120 mesh single-layer filter structure; 4) one 80 mesh and one layer of 120 mesh filter combination structure. The result shows that the permeability coefficient of the soil is affected by the mesh size. The smaller the pore size, the lower permeability in the soil. The effect of filter depends on the aperture. The aperture of the filter influences the quality of sand adhere to the filter, and affects the silt erosion. The result of the experiment provides a suggestion for the selection of the mesh filters in the precipitation of the two-dimensional foundation.
A review of Research on Seismic Performance of Steel Eccentrically Braced Frames in Prefabricated Buildings
Authors: Sun Haisu , Shi Qiang , Wang Xinwu , Li Tong , Zhangshuo Zhao 
Published: March 2020

Abstract
Prefabricated steel structure is a type of green building, which conforms to the development process of building industrialization. The hysteretic behavior, bearing capacity, rotational capacity and energy dissipation of semi-rigid joint and eccentric supports of beam and column are being summarized. At present, there are few researches on the aseismic performance and failure mechanism of beam column semi-rigid connection applied to eccentrically support steel frames.
Reliability Analysis of Loess Landslide Considering the Change of Groundwater Level
Authors: Liang Yan , He Guanghong , Huo Aidi 
Published: March 2020

Abstract
The reliability analysis of landslide is very important for the early warning and prevention of landslide. In this paper, Monte-Carlo method is used to analyze groundwater level, the variation coefficient of c and ϕ, and paleosol layer impact on the reliability of landslide in Jingyang South tableland. The reliability analysis results are as follows: (1) With the increase of groundwater level, the probability of landslide failure increases and the safety factor decreases. When the depth of groundwater level is 61m, the failure probability is 2.46%, and the average safety factor is 1.166; when the groundwater depth is 31.6 m, the average safety factor is 0.791, and the failure probability is 98.94%. (2) The coefficient of variation “δ” is positively related to the failure probability of landslide, and negatively related to the reliability index. When δ < 0.05, the increasing trend of failure probability and the decreasing trend of reliability index are most significant. (3) Paleosol layer has certain influence on Reliability. When the groundwater depth is less than 35.3 m, the average safety factor with paleosol layer is less than that without paleosol, but the failure probability is higher. When the groundwater depth is more than 35.3 m, it shows the opposite relationship.
A New Simplified Method for Calculating the Sliding Distance of the Rapid Long Run-out Loess Landslides
Authors: Liang Yan , Liu Shuanshuan , Huo Aidi 
Published: March 2020

Abstract
The area of loess in China is 640,000 km2, accounting for 6% of the total land area. Loess landslides occur frequently, causing economic losses of tens of millions of yuan per year. There is a close relationship between the hazard and the sliding distance of landslide. The study on the sliding distance of loess landslide can provide a scientific basis for the prediction of landslide risk. Based on the law of conservation of energy, a new simplified method for calculating the sliding distance of loess landslides is proposed in this paper. Based on the fact that the decrease of potential energy is equal to the energy consumed in the sliding process, the formula for calculating the sliding distance is obtained. Taking Dabuzi landslide in the Southern Jingyang Plateau (SJP) of Shaanxi Province as an example, considering the unsaturated property of soil, Morgenstern-Price method was used to calculate the slope stability of SJP and determine the most dangerous sliding surface and sliding body. According to the proposed formula, the calculated sliding distance is consistent with the actual one. The correctness of the proposed method is verified by case calculation.
Study of Dynamic Characteristics of Subgrade Soil under High Frequency Dynamic Load
Authors: Che Gaofeng , Wang Qian , Ma Jinlian , Chai Shaofeng 
Published: March 2020

Abstract
By Exerting high frequency dynamic load on the subgrade soil, the dynamic elastic damping ratio was tested under different dry density, with comparing and analyzing the results of dynamic triaxial tests, it presented the influence of dynamic elastic modulus and damping ratio on the development of subgrade soil. The results showed that the dynamic elastic modulus of the different dry density subgrade soil under high frequency dynamic load, which decreases with the increase of dynamic strain, the smaller the dry density is, the faster the dynamic elastic modulus decays; the dynamic shear modulus law is consistent with the development trend of elastic modulus, it decreases with the increase of dynamic shear deformation, the larger the elastic modulus of soil is, the larger the dynamic shear modulus is; although the damping ratio is discrete, with the increase of the dynamic shear stress, the damping ratio as a whole tends to increase, the higher the dry density is, the slower the damping ratio increases.
Study on Mechanical Properties and Damage Evolution Law of Granite after High Temperature Cooling
Authors: Chen Kai , Guo Zhenyu , Zhu Cunxian 
Published: March 2020

Abstract
In this paper, uniaxial compression test is performed on granites cooled at different temperatures to study mechanical characteristics of granites. Main conclusions are as follows: (1) the stress-strain curves of rocks after high temperature cooling show characteristics of brittle fracture, dividing into four stages: compaction stage, linear elastic stage, weakening stage and failure stage. (2) There are two temperature thresholds for the influence of temperature on the mechanical properties of rocks: mechanical properties of the rock deteriorate with increasing temperature between the room temperature and first temperature threshold; in the second temperature threshold range, The mechanical properties of the rock are gradually strengthened as the temperature rises; when the temperature exceeds the second temperature threshold, the mechanical properties of the rock gradually deteriorate. (3) Based on Weibull distribution, the damage evolution laws are proposed and the corresponding constitutive equations are derived. And the theoretical model can partially reflect the mechanical properties of the rock under different temperatures.
Risk Assessment on the Construction of Vacuum-Aided Concrete Filled Steel Tube Pouring
Authors: Wang Jianjun , He Jianqiao , Han Yu , Deng Lijian , Li Wei 
Published: March 2020

Abstract
The construction of concrete-filled steel tube (CFST) pouring is a key process in the building of CFST arch bridges, directly affecting engineering quality and structure safety. However, the construction of CFST pouring has complex procedures and multiple risk sources, and major engineering problems often arise from incorrect risk assessment. In order to reasonably analyze the hazards of various risk sources to engineering, avoid major engineering problems, and improve engineering quality, risk assessment is conducted on the construction of CFST pouring in this paper. First, As Low As Reasonably Practicable (ALARP) and risk assessment matrix are introduced, and statistics are made of the occurrence probability and risk loss rating of three major risks in the construction of CFST pouring, resulting in one I-level risk, two II-level risks, five III-level risks, and two IV-level risks. Finally, seven unacceptable events requiring special attention from decision-makers are obtained through ALARP. The results of risk assessment can be used as a basis for the construction management of practical projects, and major risks are strictly controlled through strengthening management and other methods, which will effectively reduce risk levels, providing a powerful guarantee for increasing the span of CFST arch bridges.
Analysis of Influencing Factors of Performance for Sandstone Asphalt Mixture
Authors: Ouyang Xianyuan , Zhao Chenxi , Gao Peng , Wang Xiao 
Published: March 2020

Abstract
To analyze the performance for pavement and its influencing factors of sandstone asphalt mixture, eight kinds of asphalt mixture combination plans were designed to discuss the influences of various coarse aggregate, fine aggregate and different types of anti-stripping agents on road performance. The rutting test, beam bending test, immersion Marshall test and freeze-thaw splitting test were conducted on these samples. The results indicate that the performances of sandstone asphalt mixture can be improved by replacing coarse aggregate with sandstone and then appropriately increasing the amount of mineral filler, adding cement, slaked lime and anti-stripping agent. Moreover, the high temperature and low temperature performance is significantly enhanced than that of pure limestone mixture; The water stability can be improved by adding slurred lime, cement and anti-strapping agent, but there is no significant difference between Marshall test and freeze-thaw splitting test. As for fine aggregate, there is no significant difference between white limestone and cyan limestone.
Research on Axial Compression Performance of Waste Fiber Recycled Concrete Column
Authors: Zhou Jinghai , Zhao Li , Wang Yichen , Zhao Qi 
Published: March 2020

Abstract
In order to investigate the compressive performance of waste fiber recycled concrete(WFRC) columns under axial compression, this paper used ABAQUS finite element software(FEM) to establish 8 models of WFRC columns, taking the length of waste fibers, volume of waste fibers and replacement rate of recycled aggregate as variables. The lateral deformation in midspan and stiffness of specimens under axial compression were analyzed and compared with experimental data. The results showed that the strain curves of WFRC specimens analyzed by ABAQUS software were very consistent with those obtained by experiments, and the results were basically the same. The ductility was changed by the incorporation of waste fibers, and when the length of waste fibers was 19 mm and the volume of fibers was 0.12%, the ductility of WFRC column was the best.
Study on Characteristics and Application of High Plastic Clay Filling for In-service Highway
Authors: Song Changjun , Wu Lijian , Li Peng , bian Xiaolin , Li Shengting 
Published: March 2020

Abstract
Clearing the engineering characteristics of high plastic clay and its engineering application are the basis for rational use of high plastic clay to fill the embankment. In this study, a series of water content tests, relative density tests, liquid and plastic limit tests, the grain size analysis tests, compaction and California Bearing Ratio (CBR) tests were carried out based on high plastic clay of diseased subgrade along west-section of Hainan Beltline Freeway. The relationships between CBR and water content, coarse particle content and compaction energy were studied. The results indicated that water content, coarse particle content, and compaction energy had significant effect on CBR, and water content is the main impact factor on CBR values. The maximum CBR water content was greater than the optimal water content by 4% to 5%. The performance of CBR and dry density had obvious distinction under different consistency and compaction energy. The equilibrium water content of high plastic clay subgrade during highway running period was near the plastic limit, which is 6% to 13% higher than the optimal water content. Base on the indoor test results, the problems related to the application of high plastic clay in subgrade filling were analyzed considering the characteristics of highway engineering and climate in Hainan province. It was concluded that high plastic clay could be directly used for embankment filling when the compaction energy conducted under the maximum CBR water content.
Study on Vacuum Compaction of Asphalt Mixture and its Compaction Performance
Authors: Li Yanwei , Yao Yunshi , Shi Xin , Zhang Liangqi , Li Guanfeng , Pei Su 
Published: March 2020

Abstract
In order to improve compactness of asphalt mixture, a novel vacuum compaction method is proposed and its process parameters are optimized. A simple compaction cylinder with a hole adjusting air pressure was designed and fabricated based on marshal compaction cylinder design. Common compaction and vacuum compaction were conducted separately by using compaction cylinder. The experimental results demonstrate that accumulative compaction depth with vacuum compaction was deeper compared to that of common compaction in the same compaction repetitions. In vacuum compaction, the effect of compaction at -0.08 Mpa presented the best performance. Accumulative compaction depth at - 0.08 Mpa is 3.41mm deeper than that in common compaction, increased 20.53%. Meanwhile, density, porosity, voids in mineral aggregate and percentage of asphalt volume also exhibits that vacuum degree of -0.08 Mpa is most efficient pressure value. These results indicate that vacuum compaction method can effectively improve compactness of asphalt mixture, which could provide a novel method for the enhancement of road quality and road lifespan.
Study on Hear Resistance of Cold-formed Steel Composite Wall with Openings
Authors: Li Youcheng , Wang Xingxing , Pei Xingzhu 
Published: March 2020

Abstract
In order to study the shear resistance of cold-formed steel wall with openings, a numerical model of the specimen for cold-formed steel wall with openings shear test was established using Opensees software, which was used to simulate its shear resistance under cyclic loading. On this basis, the parameters of the factors affecting the shear resistance of cold-formed steel wall with openings were analyzed. The results show that the contribution of the coupling beam to the shear performance of the whole wall is reduced with the increase of the span-depth ratio of coupling beam. When span-depth ratio of the coupling beam is greater than 5, the contribution of the coupling beam to the shear resistance of the wall is ignored. The ratio of opening to wall and the ratio of window to wall have a great influence on the shear resistance of cold-formed steel wall with openings, and the influence of each factor on the shear performance of the cold-formed steel wall with traditional side column is greater than that of the cold-formed steel wall with reinforced end studs. The stiffness of the side column has little effect on the shear resistance of the cold-formed steel wall with openings.
Experimental Study on Model of Red Mud Duncan-Zhang Model of an Aluminum Company in Shanxi
Authors: Zhang Liting , Liu Hongbo , Zhang Shaoxiong , Teng Zhiguo , Wang Shu 
Published: March 2020

Abstract
This paper takes the red mud, an auxiliary product of aluminum smelting industry in an aluminum factory in Shanxi Jinzhong as the research object, and tests the basic physical and mechanical parameters and Duncan-Zhang model parameters of red mud. According to the geotechnical test procedure, the parameters such as particle size gradation and liquid plastic limit of red mud were obtained. The stress-strain relationship curve of the red mud material was obtained by the triaxial consolidation compression test. The Duncan-Zhang model parameters of the red mud material were obtained according to the experimental data, which provided a reference for the stability analysis and calculation of the red mud yard in the future.
Study on the Reinforcement of Existing Slab Culverts by Corrugated Steel in Permafrost Regions
Authors: Guo Changzhi , Chen Hongyu , Wang Hanwen 
Published: March 2020

Abstract
Through the field detection and numerical simulation methods of existing culvert structures, the stress state of the corrugated steel structure strengthened with the slab culvert is studied, the reinforcement effect and stress state of the slab culvert structure in the unfavorable state, the corrosion of the corrugated steel and the change of the fill height are analyzed. Numerical simulation results show: Corrugated steel structure can significantly improve the internal force of the slab culvert structure and the degree of flexural deformation, and the reinforcement effect of the culvert structure under live load is more obvious. Corrugated steel structure can effectively reinforce the existing cover culvert structure when subjected to corrosion and the wall thickness becomes small, and its reinforcement performance decreases slowly with the decrease of wall thickness. When the original cover culvert structure loses its bearing capacity, the corrugated steel structure can still effectively exert the function of the original cover culvert structure. When the top fill height of the slab-culvert is between 1 m and 4 m, the reinforcement effect of the corrugated steel structure is relatively stable.
Undrained Shearing Behaviour of Kaolin after Undrained Heating
Authors: Wang Kuanjun , Shan Zhigang , Wang Mingyuan 
Published: March 2020

Abstract
With the rapid development of energy engineering, such as energy pile and gas or oil pipeline are widely used in geotechnical engineering, which will elevate the temperature of the surrounding soil. In previous researchers’ opinion, the most unfavourable case scenario occurred in practical engineering is under undrained condition, owing to the large excess pore water pressure caused by undrained heating. However, the experiments of the undrained shearing behaviour of fine-grained soil after undrained heating are rarely seen in previous researches. For this reason, series of triaxial compression tests under 20 °C, 40 °C, 45 °C and 55 °C are carried out on kaolin. The results show that critical state stress ratio M rises after undrained heating, which are consistent with the theoretical-empirical relationship of M-T. Meanwhile, the undrained shearing behaviour results are different from the previous researches, where the undrained shear strength does not decrease with the rise of temperature (undrained heating). A viscoplastic model is introduced to simulate the undrained shearing behaviour of kaolin after undrained heating, the predicted results are generally matched with the test results. The measured and predicted results show that the undrained shear strength remains nearly unchanged as temperature varies (undrained heating). The excess pore pressures of specimens under high temperature are almost the same, and greater than the one under room temperature. The measured stress paths of kaolin after undrained heating are performed as overconsolidated soil, not normal consolidated instead, which hasn’t been discovered before.
Effect of Tension Sequence of Transverse and Longitudinal Prestressed Tendons on Performance of Prestressed Concrete Reaction Wall
Authors: Zuo Yuan , Li Weibing , Chen Yunmang 
Published: March 2020

Abstract
In this paper, five different tensioning schemes for transverse and vertical prestressed tendons are proposed respectively. The numerical simulation and analysis was carried out by the finite element software Midas Fea to evaluate this interactive effect. The optimal scheme is that transverse tendons are firstly tensioned from the bottom to the top and then vertical tendons are tensioned from the middle to the side symmetrically.
Study on Flexural Bearing Capacity of Reinforced Concrete Beams with Artificial Shell Aggregate
Authors: Yang Xiuli , Zhu Renmiao , Xu Bin 
Published: March 2020

Abstract
Two reinforced concrete beams with different reinforcement ratios are designed by using the formulas and assumptions of normal section flexural bearing capacity of ordinary concrete, and the static flexural tests are carried out. The coarse aggregate used in the reinforced concrete beam is artificial shell aggregate. The strain curves of concrete with different cross-section heights prove that the RC test beam accords with the assumption of plane cross-section in the bending process. The crack distribution and mid-span deflection curve trend of the test beam show that the crack develops rapidly and the deflection of the beam increases sharply before the reinforced concrete beam with artificial shell aggregate is destroyed completely, which gives obvious damage omen and is consistent with that of the ordinary reinforced concrete beam. The strain curve of the mid-span steel bar shows that the shell aggregate above the steel bar is crushed under a certain load after the mid-span longitudinal tension steel bar is yielded, the stress of the steel bar is released, the phenomenon of strain retraction occurs, and the possibility of the mid-span steel bar being pulled off is reduced. The results show that the mechanical properties of reinforced concrete of artificial shell aggregate used as coarse aggregate of structural concrete are similar to those of ordinary concrete and it is possible to use artificial shell aggregate in structural components.