State Key Laboratory of Architecture Science and Technology in West China XAUAT

Fengcheng, China

State Key Laboratory of Architecture Science and Technology in West China XAUAT

Fengcheng, China
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Ji Y.,Xi'an University of Technology | Ji Y.,State Key Laboratory of Architecture Science and Technology in West China XAUAT | Li Y.,Xi'an University of Technology | Yang R.,Xi'an University of Technology | And 2 more authors.
Xi'an Jianzhu Keji Daxue Xuebao/Journal of Xi'an University of Architecture and Technology | Year: 2017

Cementitious material was prepared by mixing cement with different amount of quenching magnesium slag; Its physical and chemical properties were then identified with XRD, SEM, mercury injection and expansion measurement. It was found that in comparison, such cementitious materials strength increased with the reduction amount of quenching magnesium slag, so does its degree of hydration. After curing for 28 d, the cementitious materials (varying in the amount of added magnesium slag) all showed increases in density and decreases in porosity. After curing for 200 d, the shrinkage behavior of cementitious materials has not been improved when the magnesium slag content was 30%. However, such shrinkage behavior was completely offset when the content of magn-esium slag was up to 40%, and then into a slightly expanded state: the cementitious material showed great expansion behavior when the content of magnesium slag was up to 50%, and failed in the pressure steam stability measurement. © 2017, Editorial Office of Journal of Xi'an University of Architecture & Technology. All right reserved.


Feng Y.,Xi'an University of Science and Technology | Feng Y.,State Key Laboratory of Architecture Science and Technology in West China XAUAT
2011 International Conference on Multimedia Technology, ICMT 2011 | Year: 2011

Owing to the characteristics of construction projects such as one- time establishment, large-scale investment, complexity and high-energy consumption in operation, the cost management of construction projects is more difficult and timelimited than that of usual products. Thus, effective entire-lifecircle cost management and control is key to the survival of building enterprises. With the application of principles of value engineering and based on target cost management, this paper proposed a dynamic entire-life-cycle cost management model in combination with supply-chain management and cost management methods such as Kaizen cost system. As is shown, this model provides a new method to achieve reliably a better efficacy and more comprehensive benefits of construction projects with minimum entire-life- cycle cost. © 2011 IEEE.


Sun J.-P.,Xi'an University of Technology | Sun J.-P.,State Key Laboratory of Architecture Science and Technology in West China XAUAT | Li Q.-N.,Xi'an University of Technology
Xi'an Jianzhu Keji Daxue Xuebao/Journal of Xi'an University of Architecture and Technology | Year: 2010

The precise time-integration method can give precise numerical results approaching the exact solution at the integration points. However, difficulty arises when the algorithm is applied to the non-homogeneous dynamic systems due to the inverse matrix calculation and the simulation of the applied loading. A new precise time-integration method i. e. the discrete precise time-integration method is proposed. The original equations are converted into homogeneous equations, thus the new method avoids the inverse matrix calculation. The accuracy of the method depends on the length of the time-step. The order of accuracy is controllable in the method. Numerical examples are given to demonstrate the validity and efficiency of the method.


Zhang L.,Xi'an University of Technology | Zhang L.,State Key Laboratory of Architecture Science and Technology in West China XAUAT | He J.-R.,Xi'an University of Technology
Xi'an Jianzhu Keji Daxue Xuebao/Journal of Xi'an University of Architecture and Technology | Year: 2011

Change in the runoff is controlled by two vectors of natural change and human activity. The paper studies the runoff characteristics of the Weihe River basin in Shaanxi based on a distributed hydrological model and scenario analysis method. The runoff change of the Weihe River basin in Shaanxi is simulated through selecting rainfall and land use as the main factors and sets the different scene. The results show that the annual rainfall significantly affects annual runoff, the appearance time of peak monthly runoff appears clear random; runoff is not affected by land-use significantly due to less rainfall and large evaporation in the basin.


He M.,Xi'an University of Technology | He M.,State Key Laboratory of Architecture Science and Technology in West China XAUAT | Wang Z.,Xi'an University of Technology
Xi'an Jianzhu Keji Daxue Xuebao/Journal of Xi'an University of Architecture and Technology | Year: 2014

The paper discusses the influences of human thermal comfort caused by the change of mean radiation temperature near the window in winter. According to calculations, mean radiation temperature is 3℃ lower than air temperature away from window. Human radiation temperature would be affected obviously by mean radiation temperature in the conditions of lower clothing thermal residence, air temperature and relative humility. It would be also affected obviously when absolute value of PMV is greater than 1.


Duan L.,Chang'an University | Su M.,Xi'an University of Technology | Su M.,State Key Laboratory of Architecture Science and Technology in West China XAUAT
Xi'an Jianzhu Keji Daxue Xuebao/Journal of Xi'an University of Architecture and Technology | Year: 2015

In eccentrically braces frame design, the section dimension of frame is always adjusted by internal force amplify factor to resistant the strain hardening effect of link, which lead to the steel consumption and difficulty of joint. According to the seismic philosophy of "relative strength", the high strength steel can be used for frames and braces, and the low yield steel can be used for link. This new structure is called high strength steel composite eccentrically braced frames. In order to study the seismic behavior of the new structure and save steel, 2 monotonic loading and 2 cyclic loading were performed by nonlinear finite element method analysis in ANSYS, including tests on 1/2 scaled shear yielding specimens with K types braces. The material and the geometry nonlinearities were considered simultaneously. The result show that about 14% steel is saved by using high strength steel frame under condition of identical link and same stress ratio. Differences of the seismic performance between the new and the ordinary EBF are very small. ©, 2015, Science Press. All right reserved.


Wang T.-H.,Xi'an University of Architecture and Technology | Wang T.-H.,State Key Laboratory of Architecture Science and Technology in West China XAUAT | Wang J.-J.,Xi'an University of Architecture and Technology | Zhang L.-D.,Xi'an University of Architecture and Technology
Xi'an Jianzhu Keji Daxue Xuebao/Journal of Xi'an University of Architecture and Technology | Year: 2012

The test equipment is designed for measuring moisture migration in freezing unsaturated loess, using the equipment with no grill the liquid water and vapor water mixed migration results is obtained, and using the equipment with grill the moisture migration results is obtained in situation the liquid water migration channel has been blocked. Freezing the frontal advancement causes water content to increase obviously in frozen region, and freezing frontal water content increases in a big way. Opposite to moisture migration in warm region, the moisture migration to the freeze frontal area is quite slow. The increase in water content frozen region of small density loess is smaller than with the big density loess, and the freeze frontal water content increase in big density loess is relatively smaller than in small density loess. Whese initial water content is bigger, the freeze frontal water content increase in value is bigger, so is the ice layer existence. The freeze frontal water content increase along with the time in later period is smaller than earlier period. When the initial water content in loess is quite small, the mixed migration results and the establishment grill water migration results is nearly the same. This indicates that the grill blocking the liquid water migration pass has no advancement influence on moisture migration in freezing loess. When the initial water content is quite big, in comparison with the mixed migration test result, the grill is established to block the liquid water migration channel backward freeze frontal area migration water volume from reducing obviously.


Xiong Z.-M.,Xi'an University of Architecture and Technology | Xiong Z.-M.,State Key Laboratory of Architecture Science and Technology in West China XAUAT | Wang J.,Xi'an University of Architecture and Technology | Guo Y.,Xi'an University of Architecture and Technology
Xi'an Jianzhu Keji Daxue Xuebao/Journal of Xi'an University of Architecture and Technology | Year: 2011

Setting energy dissipator in the building has been in research for many years in the seismic field. One of the friction damper application problems is the damper setting place. There is great influence on energy dissipation in structure whether the damper setting place is optimized under the same number of the dampers. Eight degrees multi-in earthquake and rare earthquake dynamic time history analysis was done in an eight-floor frame by ANSYS finite element software. Three conditions of structural dynamic response are obtained: no friction damper, friction damper optimized by cycled optimum method, and friction under GA method. The results show that the structure, with friction damper installed, can markedly improve the seismic ability, and the optimization of friction damper installation place will be greatly helpful for reducing the structural dynamic response as the number of friction damper is determined.


Xue J.-Y.,Xi'an University of Architecture and Technology | Xue J.-Y.,State Key Laboratory of Architecture Science and Technology in West China XAUAT | Lin J.-P.,Xi'an University of Architecture and Technology | Ma H.,Xi'an University of Architecture and Technology
Xi'an Jianzhu Keji Daxue Xuebao/Journal of Xi'an University of Architecture and Technology | Year: 2013

The pseudo-static tests were carried out on seven steel reinforced recycled concrete columns. The main design parameters of specimens were the recycled aggregate replacement ratio, axial compression ratio, and volumetric stirrup ratio. The results indicate that the incorporation of recycled aggregate doesn't reduce the horizontal bearing capacity, ductility and energy dissipation capacity of the specimens and has little effect on seismic performance. The seismic performance of steel reinforced recycled concrete column decreases significantly in high axial compression ratio. The ductility, horizontal bearing and energy dissipation capacity of steel reinforced recycled concrete column increases simultaneausly with the volumetric stirrup ratio. This study provides a reference for the application of steel reinforced recycled concrete column.


Cheng F.-A.,State Key Laboratory of Architecture Science and Technology in West China XAUAT | Cheng F.-A.,Xi'an University of Architecture and Technology | Wei R.-L.,Xi'an University of Architecture and Technology | Li H.,State Key Laboratory of Architecture Science and Technology in West China XAUAT | Li H.,Xi'an University of Architecture and Technology
Xi'an Jianzhu Keji Daxue Xuebao/Journal of Xi'an University of Architecture and Technology | Year: 2010

Blast furnace slag is a kind of main industrial by-product generated in iron-making, which is often changed into granulated slag by water quench cooling in china at present. Based on its different properties, the techniques of utilizing granulated blast furnace slag (GBFS) were analyzed in building materials, fertilizer and swage treatment, and the future trends of GBFS reutilization were forecasted.

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