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Hui C.,Jangho Group Company Ltd | Hui C.,Tsinghua University | Cao W.-L.,Beijing University of Technology | Wang Y.-Q.,Tsinghua University | Wang B.,Jangho Group Company Ltd
Gongcheng Lixue/Engineering Mechanics | Year: 2015

In order to study the mechanism of the I-sectional concrete filled steel tube (CFST) column subjected to compression-bending load and further determine its aseismic performance index, a bottom strengthened I-sectional CFST column was proposed, whose flanges close to the bottom of the column were welded with enhancing steel plates. Based on the experimental results, the factors affecting the load-bearing capacity were analyzed. By means of finite element analysis software ABAQUS, the analysis to simulate numerically the specimens with different compression ratios, different strength grades of concrete, different heights and thickness of bottom strengthened steel plates were carried out. The analytical results were compared with the experimental results. The study shows that: the load-bearing capacity and the ductility decrease when the axial compression ratio increases; the bearing capacity also increases with the strength grade of concrete, but its decline gradient steepens and the ductility decreases; when the height of the strengthened plate increases, the load-bearing capacity of specimens increases steadily, the energy dissipation capacity increases, and the ductility is approximately equal to each other; when the thickness of the strengthened plate increases, the load-bearing capacity improves only slightly. The I-sectional concrete filled steel tube column with bottom enhancing plates shows a better aseismic performance and higher energy dissipation capacity if suitable constructional requirements are satisfied. Such structural configuration can be adopted in the design of high-rise buildings. ©, 2015, Tsinghua University. All right reserved.


Hui C.,Jangho Group Company Ltd | Hui C.,Tsinghua University | Cao W.,Beijing University of Technology | Wang Y.,Tsinghua University | Wang B.,Jangho Group Company Ltd
Advances in Structural Engineering | Year: 2015

This study analyses the working mechanism and seismic performance index of I-section steel-reinforced concrete columns with concealed double steel plates and bottom-strengthened I-section concrete-filled steel tube columns subjected to compression-bending load. For this purpose, six column models with different constructions were tested under horizontal low cyclic loading. Based on the experiments, the load-bearing capacity, stiffness and degradation process, ductility, hysteretic energy dissipation capacity and failure characteristics of the models were analysed. The formulae for calculating the load-bearing capacity for the normal and oblique sections of I-section steel-concrete composite columns were derived, and the finite element (FE) numerical simulation of the classical specimens was performed. According to the results, the load-bearing capacity, ductility and seismic energy dissipation capacity of the bottom-strengthened I-section steel-concrete composite columns are obviously improved when compared with those of the conventional I-section steel-concrete composite columns. Moreover, the calculated and FE numerical simulation results are found to be in good agreement with the experimental results. Further, the bottom-strengthened I-section steel-concrete composite column shows better seismic behaviour and higher energy dissipation capacity under suitable constructional requirements, indicating their suitability for constructing high-rise buildings.


Hui C.,Zhongyuan University of Technology | Hui C.,Jangho Group Company Ltd | Zhu Y.,Zhongyuan University of Technology | Wang B.,Jangho Group Company Ltd | And 2 more authors.
Advances in Structural Engineering | Year: 2015

On the basis of the following three experiments: (1) a single beam, (2) an unit curtain wall loaded with pressurized chamber, and (3) an unit curtain wall (UCW) loaded with sandbags, the mechanical performance of aluminium alloy beams was assessed. The experimental beams held like an open-section in an unit curtain wall, which was loaded due to wind. The out-of-plane and in-plane deformations as well as the strain of the male and female beams were measured, the results of which show that the values obtained from the aforementioned three experiments were approximately close to each other. The mechanical performance and the load-bearing capacity of the aluminium alloy beams were analyzed by using the Chinese code, the British and the American standards. On comparison, the experimental results of the load-bearing capacity were higher than that of the theoretical results. To optimize the utilization of material used in an open cross-section of the aluminium alloy beam, the theoretical method should be modified keeping in view the experimental results.


Hui C.,Zhongyuan University of Technology | Hui C.,Tsinghua University | Cao W.-L.,Beijing University of Technology | Wang Y.-Q.,Tsinghua University | Wang B.,Jangho Group Company Ltd
Zhendong yu Chongji/Journal of Vibration and Shock | Year: 2016

In order to optimize the influencial parameters of seismic performance of rectangular concrete filled steel tube (CFST) columns, a bottom strengthened rectangular CFST column whose bottom zone was welded with enhancing steel plates, was proposed. Based on the experimental results, the factors affecting the load-bearing capacity were analyzed. By means of the finite element analysis software ABAQUS, the specimens with different compression ratio, different strength grade of concrete, different height and thickness of the bottom strengthened steel plate were numerically analysed. The analytical results were compared with the experimental results. The study shows: as the axial compression ratio increases, the load-bearing capacity and the ductility decrease; as the strength grade of concrete increases, the bearing capacity also increases, but the decline of the performance curve steepens and the ductility decreases; when the height of the strengthened plate increases, the load-bearing capacity of specimens increases steadily, the energy dissipation capacity increases, and yet the ductility approximately holds without change; as the thickness of the strengthened plate increases, the load-bearing capacity improves only a little. The rectangular CFST column with bottom enhancing plates shows better seismic behavior and higher energy dissipation capacity if suitable constructional requirements are satisfied. Such structural configuration can be adopted in design of high-rise buildings. © 2016, Chinese Vibration Engineering Society. All right reserved.


Li M.,Shenyang Jianzhu University | Li M.,Jangho Group Co. | Zhao M.,Shenyang Jianzhu University | Wang Y.,Tsinghua University | And 3 more authors.
Progress in Civil, Architectural and Hydraulic Engineering - Selected Papers of the 4th International Conference on Civil, Architectural and Hydraulic Engineering, ICCAHE 2015 | Year: 2016

Diaphragm-through joint of Concrete-Filled Square Steel Tube and steel beam is a form of rigid joints. It has the characteristics of good seismic behavior, high bearing capacity, and good ductility. The research progress in China of this kind of joint is reviewed from both experimental study and theoretical analysis, including the forms of direct welding type, side plate strengthen type, circular fillet type, fillet slope type, circular slope combination type, and Steel beam end clap and board bolted type. The form of this kind of joint adopted in Chinese specification is also introduced. Finally, the problems existing in the current research and those that needed to be further studied are pointed out. © 2016 Taylor & Francis Group, London.


Li M.,Shenyang Jianzhu University | Li M.,Jangho Group Co. | Wang C.,Shenyang Jianzhu University | Wang Y.,Tsinghua University | And 3 more authors.
Progress in Civil, Architectural and Hydraulic Engineering - Selected Papers of the 4th International Conference on Civil, Architectural and Hydraulic Engineering, ICCAHE 2015 | Year: 2016

In reinforced concrete Frame-shear Wall Structure (FWS), Coupling Beam (CB) of shear wall and the corresponding frame beam up to it, i.e., Frame Coupling Beam (FCB), has a stage of cooperative working under horizontal load. It will be helpful for knowing the whole working mechanism of FWS if the working mechanism of that stage is deeply analyzed. So, the parallel double coupling beams with different widths composed of CB and FCB, briefly called Double Beams (DBs), is taken as a research object. The load-bearing process of 11 DBs under low-cycle repeated loads are simulated with finite element simulation method. How the stiffness degradation of DBs are influenced by different influencing factors are analyzed. The results show that the span-depth ratio of FCB and the span-depth ratio of SCB have the largest and second largest influence on the stiffness degradation of DBs separately, yet the width of FCB, the strength of concrete, and the reinforced area ratio of DBs has no less effect on the stiffness degradation of DBs. © 2016 Taylor & Francis Group, London.


Li M.,Shenyang University | Li M.,Jangho Group Co. | Zhang H.Y.,Shenyang University | Zhao W.J.,Shenyang University | Wen Y.T.,Shenyang University
Applied Mechanics and Materials | Year: 2014

The prefabricated construction is widely used because of it has short construction period and can be produced automatic. It has become one of the research focuses of scholars domestic and overseas that how to connect the prefabricate components in the structure to ensure the stability of the whole structure and mechanical behavior. The connection forms of beam and column are overviewed, including the dapped-end connection, the corbel connection, the weld connection, the cast-in-situ monolithic connection, the ductile rod connection, and the pre-stressed fabricated connection. Finally, the problems needed to be further study in the future are discussed. © (2014) Trans Tech Publications, Switzerland.


Li M.,Shenyang Jianzhu University | Li M.,Jangho Group Company Ltd | Liu Y.,Shenyang Jianzhu University | Sun Z.-Z.,Shenyang Jianzhu University | Yuan H.,Shenyang Jianzhu University
Gongcheng Lixue/Engineering Mechanics | Year: 2015

Near-fault pulse ground motion has large potential damage effect on structure. In order to analyze the effect of this kind of ground motion on frame-shear wall structures, near-fault double-pulse-type and multi-pulse-type ground motion are collected. Their elastic acceleration response spectra and the time history response of a 22-floor concrete reinforced frame-shear wall structure induced by them are calculated. The average elastic acceleration response spectra of the near-fault double-pulse-type ground motion is compared with that of the multi-pulse-type ground motion. The average base shear, the average maximum storey-drift-angle, the average top floor displacement, and the average whole structure damage index induced by the near-fault double-pulse-type ground motion are also compared with those induced by the multi-pulse-type ground motion. The results show: the average elastic acceleration response spectra of the near-fault double-pulse-type ground motion is similar to or larger than that of the multi-pulse-type ground motion; the average base shear, the average maximum floor displacement, the average top floor displacement, and the average whole structure damage index induced by the near-fault double-pulse-type ground motion are no less than those induced by the multi-pulse-type ground motion. Therefore, in a statistical sense, only near-fault double-pulse-type ground motion should be considered in approximately analyzing the effects of near-fault pulse ground motion on frame-shear wall structures. ©, 2015, Tsinghua University. All right reserved.


Li M.,Shenyang Jianzhu University | Li M.,Jangho Group Co. | Chen J.G.,Shenyang Jianzhu University | Zhao W.J.,Shenyang Jianzhu University | Wang L.G.,Shenyang Jianzhu University
Applied Mechanics and Materials | Year: 2014

The force behavior of parallel double coupling beams (PDCB) with different width is analyzed, based on which the feasibility of this kind of beams is discussed. The loading process of the PDCB is simulated by using finite element software ABAQUS. By analyzing the hysteretic loops, skeleton curves, energy dissipation coefficient, equivalent viscous damping coefficient and ductility coefficient, the bearing capacity and seismic performance of the PDCB is studied. Through simulation, it shows that the hysteretic loops is plump, and the energy dissipation coefficient, equivalent viscous damping coefficient and ductility coefficient of this double beams is high. It can be concluded that the PDCB has good force behavior, and the beams of PDCB can work in coordination. © (2014) Trans Tech Publications, Switzerland.


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Jangho Group Co. | Date: 2015-12-10

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