bluuebunny/crossref_metadata_2025_split huggingface dataset:
Application of spatial lateral constrained loading feedback control method in pseudo-static testing
Authors: Tian Zhen , Shi Pengfei , Sun Jianyun , Luo Ye , Zhao Yongxi , Zhai Minghui , Qi Hu , Liu Kang 
Published: November 2019

Abstract
In seismic performance testing of structures, the accurate boundary condition is the key to guarantee the accuracy of testing results. The one-way pseudo-static testing is the most common loading method in civil engineering seismic testing. However, the structures are all spatial structures in practice, therefore, the lateral constraints on specimen are necessary in one-way pseudo-static testing. The reaction devices are used to constrain the specimen laterally in traditional loading method, but the traditional loading method has some disadvantages such as high cost, large occupation of space and so on. In order to avoid those disadvantages of traditional loading method, a spatial lateral constrained loading feedback control method is proposed in this paper. In this method, the main direction loading and lateral constrain of the specimen are realized by the actuators, and the accurate control of the constraint boundary can be achieved by adjusting the position of the lateral constrained actuators. In order to verify the accuracy and feasibility of the proposed method, a pseudo-static testing of a full-scale two-story three-span single concrete frame is conducted. The experimental results show that the proposed method is reliable, and the experiment accuracy can be guaranteed.
Study of the section optimization of gravity dam based on improved PSO
Authors: Si Zheng , Yang Kai , Huang Lingzhi 
Published: November 2019

Abstract
As the linearly-decreasing inertia weight of particle swarm optimization (PSO) can easily lead to local extremum, this paper proposes an improved PSO which changes the dynamic changing pattern of Inertia Weight w based on the properties of trigonometric function. The inertia weight value of improved PSO is large at the early stage and relatively small at the later stage, thus improving the global searching ability as well as the convergence performance of the algorithm. The Optimal Section Area A(X) of non-overflow gravity dam calculated through improved PSO is 5147.3 m2 which is 6.93% lower than that calculated through SPSO (A(X)=5530.7m2). To obtain the optimal solution, the calculation steps needed by improved PSO and SPSO respectively are 15 and 22. The convergence rate of improved PSO is 31.8% higher than that of SPSO. The calculation results of the two algorithms show that the improved PSO is able to obtain better optimization results in higher convergence rate and thus is suitable for the optimization design of large-scale hydraulic structures.
Establishment and application of an evaluation system for the sustainable development of subway traffic
Authors: Geng Dong-Yang , Vojtasik Karel 
Published: November 2019

Abstract
According to the characteristics of the sustainable development of subway traffic, the establishment process of an evaluation index system is determined, and the evaluation method and basis are defined. The evaluation index system is established from the aspects of subway traffic sustainability, economic sustainability and urban coordination sustainability. The comprehensive evaluation method of the analytic hierarchy process (AHP) model is used to calculate the weights of comprehensive evaluation indexes at each level. Finally, the sustainable development model of Shijiazhuang subway traffic is evaluated. The results show that the proposed evaluation system and model reflect the degree of sustainable development of subway traffic and can be used for reference in the evaluation of regional subway traffic sustainable development.
A study for Application Research of “Regional” Architectural Culture in Architectural Design Courses
Authors: Guifen Lyu , Yu-Che Huang , Bei Shang 
Published: November 2019

Abstract
Under the impact of the globalization culture, the city’s style looks like the same in many cities in China. It has caused the reflection of the architects and hopes to integrate regional culture into the architectural design. This article takes the design topic “Pedestrian Commercial Street Design” in architectural design teaching as an example. By comparing the learning effects of students before and after study, it provides practice and reflection for regional architecture design. Firstly, it reviews and discusses the development of Yinchuan regional architecture and regional theory as the basis of teaching process. Secondly, through the practical operation of design teaching, students are guided to complete relevant design content. Finally, through the questionnaire survey on the learning effect before and after the students’ study, the students’ regional academic operation results are summarized. By reflecting on the concept of regional architecture in the process of design teaching, the author tries to put forward some suggestions on the development of regional architecture.
A Study on the Insulation Effect of the Roof Greening Overhead Structure in Hot-moist Regions
Authors: Jin Xueli , Hu Yongping , Zhou Guiting , Huang Zhilu , Li Rongying , Meng Qinglin 
Published: November 2019

Abstract
The climate in hot-moist regions like Guangdong is characterized as short in summer and long in winter, which imposes high insulation requirements on the roof of houses. In this case, this paper proposes a roof greening overhead structure, which is developed by making a bracket under the existing planting box after reinforcing the bottom thereof, thus there will be an overhead layer with a height of 300mm between the planting box and the roof. The study used three office rooms with identical conditions on the top floor of the office building as the test rooms. The roofs of the three rooms were set as the roof with the overhead planting box, the roof with the existing planting box and the reference roof, respectively. The temperatures of the structural layers in the three test rooms were measured under the non-air-conditioning closed conditions in summer. The hourly power consumptions of the air-conditioners in the three test rooms were measured under the air-conditioning closed conditions in summer. The results indicates the natural ventilation formed by the overhead structural layer can improve the overall insulation effect of the roof. The energy saving rates of the air conditioners in the room with the overhead planting box on the roof reached 28.2%.
Ultimate Bearing Capacities of Concrete Filled Hybrid Composite Tubular Short Columns
Authors: Su Jiazhan , Zhou Lanjian , Wu Hwaichung , Chen Baochun 
Published: November 2019

Abstract
The new reinforcement material, Hybrid Composite (HC), is new innovative material and made of carbon fiber or other fibers in the form of tubular weave or braid. HC tubes has been used in column and pier to restrict the lateral expansion of concrete to improve the compression performance, while protecting the column as well. In this paper, the mechanical behavior of HC reinforced concrete short columns under axial and eccentric compression loading is analyzed. By testing the model and analysis the result using finite element software ABAQUS, the displacement, and load capacity of all specimens are collected and analyzed in terms of the number of HC layers and eccentricity ratios. The results show that the ultimate load capacity of columns increases with the number of HC layers under axial compression, and the ductility of the reinforced columns was significantly improved by HC reinforcement, compared with plain concrete columns.
Application of cantilever roadheader in tunnel construction
Authors: Xia Zhao , Junying Rao , Chengshan Cheng , Caijin Xie 
Published: November 2019

Abstract
Cantilever roadheader is widely used in coal roadway engineering, but it is rarely used in urban subway tunnels. The underground boring tunnel in Guiyang City is selected as the object. The background and purpose of the cantilever roadheader, the construction technology and method, the advantages and disadvantages analysis and the construction optimization are selected to study its application in the underground karst tunnel. Studies have shown that the use of cantilever type roadheader can speed up construction progress, reduce surrounding rock disturbances, reduce safety risks and improve excavation quality, which is unmatched by traditional drilling and blasting construction.
Study on Tunnel Risk Assessment Based on Rough Set and Grey Theory
Authors: Wu Xuling , Pan Jierui , Liao Yuxuan , Zhou Ying 
Published: November 2019

Abstract
The surrounding environment of railway tunnel engineering is complex, and it is prone to major safety accidents. It is necessary to adopt feasible and accurate evaluation methods. The evaluation index system of tunnel is established. Rough set is used to quantify the evaluation index and form the reference index. The risk evaluation model of tunnel based on rough set and grey is established, and the risk of Sheguchong tunnel in Yunnan Province is validated to evaluate the validity of the model.
Simulation Study of Window Size on Indoor Lighting of Old-age Buildings
Authors: Wu Mengyun , Jiang Shuguang , Li Jie , Dai Jin , Xu Xin 
Published: November 2019

Abstract
With the rapid development of China’s society, the aging of the population has gradually developed into a hot issue of society. The degree of aging has intensified. The old-age environment of the elderly has gradually become the focus of social attention, and the natural light environment is an important part of the old-age environment. Its role can not be ignored. Based on the light and climate characteristics of the severe cold regions of Xinjiang, this paper uses the light environment simulation software Ecotect to analyze the influence of window-to-wall ratio and window height on the interior lighting of the building, and improve the indoor light environment of the building by changing the size of the window and the height of the window sill. Further suggestions are proposed to improve the light environment of the nursing home.
Importance of seismic hydrodynamic pressure for design of bridge pier in deep water from a numerical case study
Authors: Liu Haiming , Tao Xiaxin , Tao Zhengru , Zhang Shiwang 
Published: November 2019

Abstract
The importance to take into account the hydrodynamic pressure on bridge pier in deep water for seismic design is deal with in this paper from a numerical case study. In that study, a bridge pier in 54 m water is modeled as single pier, the interaction between soil-pile foundation system and pier is expressed by springs from M method and mechanical analysis, that between water and the pier is by added mass and damping of moving water from Morison equation. Seismic responses of the model in conditions with 6 water depths and without water are calculated respectively, with inputs of 12 ground motions for 4 fortification intensities. The maximum values of shear forces at the bottom of the pier are acquired from the corresponding response time histories, and compared with those without water. The result shows that the effect of the hydrodynamic pressure must be taken into account in design of bridge in deep water as it may be even larger than that of strong ground motion if water depth is larger than 50 m.
Preliminary seismic vulnerability matrix related with fortification intensity for Sichuan region
Authors: Tao Xiaxin , Tao Zhengru , Kang Mengya , Zheng Guangfen 
Published: November 2019

Abstract
The significance to develop fortification intensity related vulnerability matrix for earthquake prevention and mitigation is emphasized in this paper. The way to acquire the fortification intensity data of buildings damaged in the great Wenchuan earthquake, from their construction years with the seismic zoning maps in three time periods, is reported. Preliminary statistical results of vulnerability matrices related with fortification intensity VI, VII and VIII, are presented for brick-concrete structure and frame structure buildings in Sichuan region. The results show clearly the decrease of vulnerability with increase of the fortification level.
Research on the Causes and Prevention of Airport Pavement Diseases
Authors: Feng Xinpu , Guo Lei , Ren Geng , Liu Shaoning 
Published: November 2019

Abstract
The structure of airport runway has changed the balance of water movement between the original surface and the atmosphere, resulting in the accumulation of water under the base of airport runway surface, forming a “pot-cover effect”, aggravating the uneven settlement of the foundation under aircraft load, resulting in the destruction of the structure of the runway surface, frequent diseases, and seriously affecting the airworthiness of the runway. In order to solve the problem of water enrichment under the base of the runway surface, this paper proposes a specific layout scheme of diversion canals. In the runway overhaul project of Shenyang Taoxian International Airport, the water diversion canal was excavated on the spot, and it was found that the water level at the site was comparatively consistent with the water level at the scheme analysis. The layout scheme of the water diversion canal was reasonable and effective, and could well solve the problem of “pot-cover effect”.
Study on the technique of single-layer initial arch cover method in Hongyan Village Station
Authors: Zaifeng Yao , Xiaohong Guo 
Published: November 2019

Abstract
Aiming at the geological characteristics of the upper soft and hard stratum in Chongqing area, taking the Hongyan Village Station of Metro Line 9 as an example, the excavation method of super-large section single-layer initial arch cover method is proposed. The finite element numerical simulation is used to analyze the horizontal and vertical displacement of the surrounding rock, the axial force and bending moment of the single-layer initial arch cover, and the axial force distribution of the anchor. It is concluded that the single-layer initial arch cover method can meet the control requirements of deformation and surface settlement of super-large section surrounding rock. The initial arch cover of H220 grill steel frame + φ25, L=4.5m hollow grouting anchor + 300mm thick C25 wet-sprayed concrete can meet the bearing capacity requirements and ensure the overall stability of the structure. The connection mode of the large arch and the side wall arch is optimized to ensure that the initial branch is completely closed and looped. Combined with on-site monitoring and measurement data, it is feasible to use a single-layer initial arch cover method at Hongyan Village Station.
Computational Investigation on the Seismic Performance of Self-Centering Tension-Only Braced Frames
Authors: Chi Pei , Tian Wenlong 
Published: November 2019

Abstract
The self-centering tension-only brace (SC-TOB) is a new type of flexible bracing system that provides both energy dissipation and re-centering capacities to the structure. In this paper, a computational investigation on the seismic performance of steel frames with SC-TOBs is conducted. Two main parameters, including the stiffness degradation factor and the activation strain of the SC-TOB, are investigated through pushover analysis. The results indicate that increasing the stiffness degradation factor leads to a larger second stiffness of the SC-TOB frames (SC-TOBFs), which is beneficial to make the distribution of drifts more uniform over the building height; the activation strain has a significant impact on the activation deformation of SC-TOBFs, but a slight effect on the distribution of drifts. The SC-TOBFs is deemed as a type of performance-tunable structure, which can be achieved by varying a frame’s adjustable design parameters.
Planar Distribution Model of Airport Pavement Traffic Volume
Authors: Shi Xingang , Cai Liangcai , Wang Guanhu , Zhang Duoyao , Meng Chaomei , Wu Aihong 
Published: November 2019

Abstract
The current specification of airport pavement design and evaluation had seldom pointed out the longitudinal distribution of airport pavement traffic volume (APTV) except the wheel offset at the edge or the central section of the runway. In this study, the characteristics of APTV were pointed out, which revealed that every point of the pavement had a different traffic volume. Then using the longitudinal traffic factors, the planar distribution model was established. At last, influence factors of APTV including take-off probability ratio at one side, runway length, take-off running distance and lateral distribution were analyzed. Examples and analysis showed that only considering the lateral distribution of APTV would make the pavement design more conservative.
Research on Force Design of Concrete Filled Steel Tube Structure with Open Hole and Stiffener
Authors: Tang Peng , Cheng Gao 
Published: November 2019

Abstract
The built-in open-hole type stiffened rectangular steel tube concrete refers to a new combined structure formed by forming an open-hole steel plate in the longitudinal direction of the inner wall of the steel pipe and then filling the concrete. In order to study the function of the built-in open-hole stiffened joints, the design of the stiffened rectangular steel tube concrete was designed to analyze the influence of the mechanical properties of the steel-mixed interface. The results show that the vertical rib opening is formed, and the bearing capacity of the rectangular steel tube concrete interface is increased by 2.06 times under the limit state. The shear stiffness and shear capacity of the interface are improved by more than 4 times under normal use.
Analysis on the Stability of double-fastener type Tubular Scaffold
Authors: Su Liya , Fu Liping 
Published: November 2019

Abstract
The fastener type scaffold has the advantages of dismounting convenience, wide universality and good integral rigidity, which can bring convenience for construction. In this paper, the finite element software ANSYS10.0 has been used to construct a semi-rigid tubular scaffold model, on which certain concentrated load has been applied for numerical analysis. This paper mainly studies the effect of steel-tube thickness and the arrangement of connecting tubes on the stability of scaffold, so provide a theoretical basis for the practical construction and design of scaffold, and to reduce the incidence of accidents.
Study on mechanics damage mechanism of arch surround reinforced structure under loose load
Authors: Liu Xue-zeng , Lai Hao-ran , Sang Yun-long , Zhang Yu-hui 
Published: November 2019

Abstract
Lining crack is a typical disease of highway tunnels in operation, which affects the long-term operation safety of tunnels. The arch surround is suitable for strengthening tunnel projects with serious cracks due to its characteristics of significantly increasing structural bearing capacity and prolonging service life. However, at present, the damage evolution mechanism of arch surround reinforcement structures under loose loads based on the secondary stress mode is not well understood. Aiming at the above problems, in this paper, based on the load structure method, indoor 1:10 model test of arch surround reinforcement for Grade VI surrounding rock and damaged lining structure is carried out and the stress and deformation law, failure mode and ultimate bearing capacity of tunnel after arch surround reinforcement is explored. On this basis, finite element software is used to simulate the whole process of damage evolution of arch surround reinforced the structure, and to explore the mechanism of mechanical damage evolution of arch surround structure after reinforcement. The results show that the arch surround reinforcement can effectively repair the damaged tunnel and greatly improve its bearing capacity. When the residual bearing capacity of lining is 48.4%, the bearing capacity is increased by 164%. The original structure of the second lining and the reinforced structure of the arch surround are both in large eccentric compression failure. The main damaged parts are the vault and the haunch. The failure of the reinforcing structure of the arch surround is caused by the slip cracking of the combined surface between the second lining and the arch surround. Anchor bolts should be added to improve the shear bearing capacity of the combined surface.
Deformation mechanism of mining roadway and establishment of its mechanical model
Authors: Jing Suolin , Jiang Pengfei , Huang Gang , He Xue , Zhang Jingkai 
Published: November 2019

Abstract
Accurately understanding of the strata behaviors law and stability characteristics of the mining roadway is the basics of effective surrounding rock control, and the structural characteristics of the surrounding rock is the decisive factor for large deformation of that in mining roadways. In this paper, the surrounding rock structure characteristics of mining roadway in different conditions were discussed and mechanical model was established accordingly. And the deformation characteristics of the material were simulated by the combined model of deformation elements, and the theory of the surrounding rock deformation in the mining roadway with time was obtained.
Risk assessment research on the application of improved analytic hierarchy process in building foundation pit based on fault tree model
Authors: Wen Zhang Zheng , Yan Liu 
Published: November 2019

Abstract
Foundation pit engineering plays an important role in infrastructure construction, but the collapse of support structure of the foundation pit often occurs. This paper takes the structural importance in the fault tree as the basis of the analytic hierarchy judgment matrix, pointing out that the construction process planning is the most important for the foundation pit engineering. The improved analytic hierarchy process (AHP) helps to reduce subjectivity, which is used to conduct the risk assessment of the collapse of the support structure of the foundation pit. In this way, this paper provides reference for the risk evaluation of the foundation pit engineering.
Study on reasonable width of coal pillar near the edge of panel based on prevention and control of rock burst
Authors: Yan-liang Wang , zhen-pei Zhang , Ya-dong Dong , Gang Han 
Published: November 2019

Abstract
The reservation of the coal pillar with reasonable width is the key to ensuring safe recovery of mining areas and working faces along the goaf. This paper studies the reasonable width of the coal pillar in the south wing of the 302 and the 301 panels by taking a mine in the Mengshan Base as an example, using theoretical research, numerical simulation and on-site measurement analysis. The three-zone theory is adopted to estimate the lateral bearing pressure of the goaf, showing that the width of the low stress zone is not less than 83 meters. The results of numerical simulation analysis show that the 20-meter coal pillar between the 1# and 2# ventilation roadways of the 201 working face has a high stress concentration, thus unable to meet the requirements for arranging small coal pillars. The high stress zone is concentrated within the lateral range of 90 meters. The micro-seismic data analysis shows that the micro-seismic accidents during the recovery of 202 working face are concentrated within the lateral direction of 80 meters. With the resource recovery and the impact of rock burst disaster prevention and control taken into consideration, this paper sets the reasonable width of the boundary coal pillar of the 302 panel to be no less than 85 meters.