Hefei Administrative Bureau of Key Engineering Project

Hefei, China

Hefei Administrative Bureau of Key Engineering Project

Hefei, China
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Li H.-F.,Huaqiao University | Luo Y.-F.,Tongji University | Li D.-Z.,Hefei Administrative Bureau of Key Engineering Project | Ding D.-Y.,Wuzhou Engineering Design and Research Institute
Sichuan Daxue Xuebao (Gongcheng Kexue Ban)/Journal of Sichuan University (Engineering Science Edition) | Year: 2013

Based on pseudo-static experimental results of 16 steel box columns and numerical results of 85 calculated members, the hysteretic behaviors of eccentrically constant-compressed steel box columns under cyclic lateral loading were investigated. By regression analysis on experimental and numerical results, the formulas for key points in skeleton curve were obtained. According to the experimental results, the degeneration rules of strength and stiffness of eccentrically constant-compressed columns under cyclic lateral loading were suggested. The restoring force model of steel box columns in large span spatial structures was proposed. Finally, the comparisons between results from the restoring force model and experiments were conducted. It was found that the restoring force model shows high solution precision, especially in the degeneration property of strength and stiffness of eccentrically constant-compressed columns under cyclic lateral loading. The restoring force model could be applied to the elastic-plastic analysis of large span spatial structures.


Li H.,Huaqiao University | Luo Y.,Tongji University | Li D.,Hefei Administrative Bureau of Key Engineering Project | Ding D.,Wuzhou Engineering Design and Research Institute
Jianzhu Jiegou Xuebao/Journal of Building Structures | Year: 2013

Based on quasi-static experimental results of steel box columns and numerical results of calculated members, the effects of width-to-thickness ratio of web plate, slenderness ratio, axial compression ratio and bending moment on the seismic behavior of eccentrically constant-compressed steel box columns under cyclic lateral loading were investigated. The study results show that the width-to-thickness ratio of web plate and the slenderness ratio have very significant effect on the seismic behavior of columns. When the width-to-thickness ratio of web plate or the slenderness ratio of the column increases, the ductility and load-bearing capacity of the column decrease rapidly, which indicates the seismic resistance of the column is deteriorated. The ductility of the column on one side is improved by the effect of bending moment at the loading joint of the column, while the ductility of the column on the other side is decreased. The effects of bending moment on the seismic behavior of the columns are relatively small. Based on the experimental and numerical results, the limits of width-to-thickness ratio and slenderness ratio of steel box columns in large span structures were proposed, which were dependent on the stress state of the columns. The concept of member displacement angle was introduced, and the method to determine seismic grade of steel members was also developed. Finally, the seismic design procedure of width-to-thickness ratio and slenderness ratio of steel box columns was suggested.


Li H.-F.,Huaqiao University | Luo Y.-F.,Tongji University | Li D.-Z.,Hefei Administrative Bureau of Key Engineering Project | Ding D.-Y.,Wuzhou Engineering Design and Research Institute
Gongcheng Lixue/Engineering Mechanics | Year: 2013

Pseudo-static experiments on the seismic behavior of 8 eccentrically constant-compressed steel box columns under cyclic lateral loading are conducted. The local stability and the seismic behavior of steel box columns in Hefei Xinqiao Airport Terminal under the action of an earthquake are investigated. Experimental results show that the steel box columns in Hefei Xinqiao Airport Terminal under the action of a frequent earthquake are in an elastic state, and the plate is steady. While the columns under the action of a rare earthquake are in an elastoplastic state, and the plastic deformation is found. The local stability of columns under the action of the rare earthquake is satisfied code demands. It is also found that the width-to-thickness ratio of a web plate has an obvious effect on the seismic behavior of the steel box columns. When the width-to-thickness ratio of the web plate increases, the area of the hysteresis loops tends to descend, and the load-bearing capacity and stiffness of the steel column degenerate severely. Finally, details of fabrication and suggestions of the aseismic design for steel box columns in large span structures are proposed.


Li H.-F.,Huaqiao University | Luo Y.-F.,Tongji University | Li D.-Z.,Hefei Administrative Bureau of Key Engineering Project | Ding D.-Y.,Wuzhou Engineering Design and Research Institute
Gongcheng Lixue/Engineering Mechanics | Year: 2013

The mechanical performance of eccentrically constant-compressed steel box columns under cyclic lateral loading were analyzed by finite element models, in which the influence of material nonlinearity, geometric nonlinearity, initial geometric imperfection and residual stress were considered. The finite element models were proved to be accurate according to the comparison between results from the finite element analysis and experiments. Based on numerical results of 85 steel box columns, the aseismic behavior of eccentrically constant-compressed steel box columns under cyclic lateral loading were investigated. The study results show that the width-to-thickness ratio of a web plate has dominant effect on the aseismic behavior of the columns. With the increase of the width-to-thickness ratio, the ductility of the column becomes weak, and the load-bearing capacity and stiffness of the column degenerate rapidly. When the axial compression ratio of middle slenderness ratio columns is small, the aseismic behaviors of columns are influenced by total instability, local buckling and plastic deformation, while the total instability is the dominated effect for the columns with a larger axial compression ratio. It is also found that the skeleton curve of the column has the performance of translational movement by the effect of bending moment at the loading joint of the column, while the effect of bending moment is relatively little and negligible. Based on the regressive numerical results, the bearing shear force at the loading joint and displacement ductility of eccentrically constant-compressed steel box columns under cyclic lateral loading are fitted.


Li D.,Hefei Administrative Bureau of Key Engineering Project | Ding D.,China North Industries Group Corporation | Wang Y.,Tsinghua University | Liu L.,Tsinghua University | Wan H.,Hefei University of Technology
Advanced Materials Research | Year: 2011

The steel structure of Hefei Xinqiao International Airport Terminal was taken as a background of this article. The large-span frame is a typical frame of the structure. The curved box-girders are the critical parts of the whole frame. This paper focused on the mechanical properties of the curved girders, as well as the influence on box-columns connected with them. Stability problem is a key problem in the steel structure design, and effective length factor is a way to reflect the stability problem in code for design. In this paper, the whole model of the airport terminal was established to conduct eigenvalue buckling analysis to obtain effective length factors of the box-columns connected to the curved box-girder. In the finite model, a unified axial force was applied on the end of the box-column, and the elements of the box-columns and the adjacent members were refined. Then the effective length factors were derived through the buckling models. In this paper, the curved box-girders of Hefei airport building were studied using finite element software ANSYS. The local model of the curved box-girders were set up to study the mechanical properties of the curved girders including the ultimate capacity analysis. Parametric analysis of the girders was carried out, and the results could be used to guide the design. The results show that finite element method is a convenient way of calculating effective length factors for members with complex boundary conditions, and analysis of local models provides reasonable suggestions for design. © (2011) Trans Tech Publications.


Li H.,Huaqiao University | Li H.,Key Laboratory for Structural Engineering and Disaster Prevention of Fujian Province | Luo Y.,Tongji University | Li D.,Hefei Administrative Bureau of Key Engineering Project | Ding D.,China Wuzhou Engineering Design Group Co.
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | Year: 2015

The degradation characteristics of stiffness and strength, load-displacement curves, failure shape and stress distribution of 16 steel box columns and 85 numerical calculated members were investigated. The interactive mechanism between local buckling and overall instability of steel box beam-columns under cyclically lateral loading was also discussed. Based on the regressive results of experimental and numerical data, the formula of stability bearing capacity of steel box beam-columns under cyclically lateral loading was fitted. The results show that when the axial compression ratio of steel box column is less than 0.1 or the maximum slenderness ratio is less than 40, the local buckling of plate has dominated effect on the mechanical behavior of steel box columns. The width-to-thickness ratio of web plate has main effect on the ductility and the degradation characteristics of stiffness and strength of the columns. While the axial compression ratio of steel box column is more than 0.2 and the maximum slenderness ratio is more than 80, the overall instability has dominated effect on the mechanical behavior of steel box columns. The effects of axial compression ratio and slenderness ratio on the mechanical behavior of the columns are both conspicuous. ©, 2015, Central South University of Technology. All right reserved.

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