Guangzhou City Construction and Development Design Institute Co.

Guangzhou, China

Guangzhou City Construction and Development Design Institute Co.

Guangzhou, China
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Yang C.,South China University of Technology | Wu Y.,Guangzhou University | Zheng J.,Guangzhou City Construction and Development Design Institute Co. | He M.,South China University of Technology | Zhang C.,Guangzhou University
Tumu Gongcheng Xuebao/China Civil Engineering Journal | Year: 2012

Steel reinforced concrete (SRC) beam transfer structure with supplemental energy dissipation haunch brace (EDHB) is a new kind of transfer structure. Experimental investigations verified that the new type of transfer structure has good energy-dissipating capacity and better seismic performance, compared with normal SRC transfer structures. The influences of axial compression ratio of frame columns and columns supported by the transfer beam, arrangements of EDHB, stiffness ratio of EDHB to transfer beam (K h'), on the seismic behaviors of this type of structure were studied by using the finite element method. Results show that the seismic behaviors of the transfer structure can be more significantly improved by adding EDHB when the axial compression ratios of the frame columns and columns supported by the transfer beam are relatively large. By summarizing the results of the structural responses and the deformation and energy dissipation of the haunch braces, the optimized design parameters of EDHB can be obtained, the haunch brace angle (θ) should be between 30 to 45 degree, the distance (a) from the haunch tip to the beam end should be kept at L b/6-L b/5, and K h' between 0.2 and 0.3.


Wu Y.,Guangzhou University | Yang C.,South China University of Technology | Yang C.,State Key Laboratory of Subtropical Building Science | Li G.-X.,Guangzhou City Construction and Development Design Institute Co. | Zhang C.-M.,Guangzhou University
Advanced Materials Research | Year: 2012

Experimental researches of one 1:6 scale steel truss reinforced concrete (STRC) transfer beam were carried out to investigate mechanical performances of a transfer beam under vertical loads in an actual tall building. The development of crack along the beam, strains of reinforcements and steel truss, and the force transference mechanism of the deep beam were analyzed. Experimental results showed that the bearing capacity and rigidity of the STRC transfer beam are significantly enhanced compared with normal RC transfer beam. The strut-and-tie force transference mechanism is formed in the STRC transfer beam and fully made use of by the STRC transfer beam. And results verified that the shortest and most direct force transference path can be achieved to transfer upper loads.


Wu Y.,Guangzhou University | Yang C.,South China University of Technology | Yang C.,State Key Laboratory of Subtropical Building Science | Zheng J.-G.,Guangzhou City Construction and Development Design Institute Co. | And 2 more authors.
Gongcheng Lixue/Engineering Mechanics | Year: 2013

A steel reinforced concrete (SRC) beam transfer structure with a supplemental energy dissipation haunch brace (EDHB) is a new kind of transfer structure whose state of internal forces and seismic performance is different from those normal energy dissipation structures, and lack of theory to guide its design process. Therefore, based on the established simplified calculation model of this kind of structure, formulas of the internal forces at the controlled cross sections are derived by the theoretical analysis method. A design method based on the ductility concept of "strong column-weak beam", "strong shear-weak bending" and "strong joint-weak members" is established using the formulas. The analysis of design examples showed that, compared with a normal structure, the stiffness mutation at transfer storey can be efficiently reduced and the ductility of a structure can be improved when a SRC beam transfer structure with EDHB was designed by the presented design method. The design method presented by the paper can be the theoretical references for the design of the new type of transfer structure.


Yang C.,South China University of Technology | Wu Y.,Guangzhou University | He M.-J.,South China University of Technology | Zheng J.-G.,Guangzhou City Construction and Development Design Institute Co. | Zhang C.-M.,Guangzhou University
Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science) | Year: 2011

In order to avoid serious damage at the transfer storey of a transfer structure in earthquake, energy dissipation haunch braces (EDHBs) were used to strengthen the transfer structure, and the SRC (Steel-Reinforced Concrete) transfer frame structures with and without EDHBs were tested under cyclic loading. The results show that (1) reasonably-designed frame structure with EDHBs is effective in controlling the crack development of the transfer beam; (2) with the setting of EDHBs, the initial stiffness of the transfer structure improves, and the bearing capacity, the ductility coefficient, the hysteretic energy dissipation and the equivalent viscosity coefficient respectively increase by 10.9%, 77.1%, 93.1% and 107%; and (3) EDHBs not only strengthen the damaged transfer storey but also improve the seismic behaviors of the transfer structure. In addition, by comparing the test results with those obtained from the proposed fine finite element model of the SRC transfer structure with EDHBs, it is found that the proposed model is accurate enough for the subsequent finite element analysis of the structure with EDHBs.


Wu Y.,Guangzhou University | Yang C.,South China University of Technology | Li G.-X.,Guangzhou City Construction and Development Design Institute Co. | Pan J.-M.,South China University of Technology | Liu S.-P.,South China University of Technology
Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology | Year: 2011

Evaluation of seismic performances of steel reinforced concrete (SRC) frame supported shear wall structure was carried out. Seismic performance parameters (maximum inter-story drift angle) of the structure corresponding to various performance levels were obtained from the intersection point between the capacity curve and seismic demand curve. Aseismic effects of viscous dampers were analyzed based on the seismic demand of the structure. According to the pushover analysis, the failure mechanism of the SRC frame supported shear wall structure was investigated. Results show that the anti-collapse performance object of the SRC frame supported shear wall structure can be achieved on the basis of the design specification. The seismic demand of the structure can be decreased effectively by adding viscous dampers under earthquake actions with various magnitudes. And the maximum inter-story drift angle can be decreased 54% maximally. Based on the analysis of distributions and development of the plastic hinges, beam hinge failure mechanism of the SRC frame supported shear wall structure can be determined and the plastic deformations of beam hinges are much fully developed. The SRC transfer beams, concrete filled steel tubular core columns, reinforced concrete shear walls are still kept in the elastic states.


Yang C.,South China University of Technology | Li G.-X.,Guangzhou City Construction and Development Design Institute Co. | Wu Y.,Guangzhou University | Chen L.-X.,Guangzhou University | Zhang C.-M.,Guangzhou University
Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science) | Year: 2013

The dynamic time history and push-over analyses of SRC (Steel-Reinforced Concrete) frame-supported shear wall structures with and without viscous dampers were carried out to obtain the seismic demand and capacity curves, and the seismic performances of the structures were evaluated and the expected performance objects were verified. Then, by analyzing the distribution and development of plastic hinges, the failure mechanism of the structures was investigated. The results show that viscous dampers effectively decrease the seismic responses of the structures, that the peak displacement and the maximum inter-story drift angle of the structures respectively decrease by 35% and 38% under earthquake actions with different intensities, that the seismic demand of the structure with viscous dampers decreases by 14% to 54%, that beam hinge failure is dominant in the structure fai-lure, and that most of transfer components and shear walls are still kept in weakly nonlinear state when the structure fails. Thus, the seismic performance object, namely transfer components and shear walls at the transfer and refuge stories are in elastic state under medium earthquake actions, is achieved.


Yang C.,South China University of Technology | Pan J.-M.,South China University of Technology | Cai J.,South China University of Technology | Liao X.-S.,South China University of Technology | Li G.-X.,Guangzhou City Construction and Development Design Institute Co.
Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science) | Year: 2013

Some seismic performance indexes, such as the seismic response of the overall structure, the strain of material and the deformation of main structural components, were proposed to comprehensively assess the seismic performances of a structure in the aspects of overall and local responses. Then, nonlinear dynamic time-history analyses were carried out to study the seismic performances of a super high-rise frame-core wall structure with vertical irregularity and exceeding height by adopting Perform 3D. The results show that (1) the deformation of the overall structure meets the requirements of the specification; (2) the deformations of the main force components are basically in serviceable state; and (3) although plasticity concentrates on shear walls and frame girders at the storey where the structural layout retracts, the average deformations of the components are still in serviceable state. Thus, it is concluded that the proposed seismic performance indexes can be achieved by super high-rise frame-core wall structures.

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