Northwest Electronic Power Design Institute

Fengcheng, China

Northwest Electronic Power Design Institute

Fengcheng, China
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Wang B.,Xi'an University of Architecture and Technology | Bai G.-L.,Xi'an University of Architecture and Technology | Dai H.-J.,Xi'an University of Science and Technology | Zhu J.-N.,Xi'an University of Architecture and Technology | Li H.-X.,Northwest Electronic Power Design Institute
Gongcheng Lixue/Engineering Mechanics | Year: 2014

Following the actual stress states of typical abnormal joints of SRC hybrid structures in power plants, five 1/5 scale model abnormal joints were tested under low-cyclic reversed loading. The influence of setting short-limb shear walls along the height of SRC columns on the seismic performance of SRC abnormal joints was analyzed. The results show that short-limb shear walls can restrain the development of cracks, as well as greatly improve the hysteretic performance, energy dissipation capacity, bearing capacity, stiffness characteristics, and ductility performance of SRC abnormal joints; also, the improvement is greater in SRC abnormal joints with horizontal short limb-shear walls than in the joints with longitudinal short-limb shear walls. ©, 2014, Tsinghua University. All right reserved.


Wang B.,Xi'an University of Architecture and Technology | Bai G.,Xi'an University of Architecture and Technology | Dai H.,Xi'an University of Science and Technology | Zhu J.,Xi'an University of Architecture and Technology | Li H.,Northwest Electronic Power Design Institute
Jianzhu Jiegou Xuebao/Journal of Building Structures | Year: 2013

Split-level, variable beams and columns in main building structure in the thermal power plants bring a large number of abnormal interior joints. The quasi-static test for five typical specimens in 1/5 scale of the prototype model were carried out, to study the hysteretic performance, energy dissipation capacity, ductility, stiffness characteristics and bearing capacity of this kind of abnormal joints. The results show that: the dominant failure mode is plastic hinges failure at column ends for four steel reinforced concrete abnormal interior joints which is not good for seismic resistance, while the failure mode mainly the shear damage in core area for the reinforced concrete abnormal interior joint because the beam-column stiffness ratio is quite large. The height of split-level which is caused by the large beam and small beam has certain influence on the bearing capacity, ductility capacity and stiffness characteristics of steel reinforced concrete abnormal interior joints, but the influence law is not obvious. The dissipation capacity of steel reinforced concrete column-reinforced concrete beam abnormal interior joints is better than the reinforced concrete abnormal interior joint. For the limitation of failure mode, however, the bearing capacity, ductility, stiffness characteristics of steel reinforced concrete column-reinforced concrete beam abnormal interior joints are lower than the reinforced concrete abnormal interior joints'. Compared with the steel reinforced concrete abnormal interior joint with reinforced concrete beams, the initial cracking bearing capacity of steel reinforced concrete abnormal joint with steel reinforced concrete beam is higher, and its stiffness characteristic is better, but its bearing capacity, ductility performance and energy dissipation do not enhance obviously.


Wang B.,Xi'an University of Architecture and Technology | Bai G.,Xi'an University of Architecture and Technology | Dai H.,Xi'an University of Science and Technology | Zhu J.,Xi'an University of Architecture and Technology | Li H.,Northwest Electronic Power Design Institute
Tumu Gongcheng Xuebao/China Civil Engineering Journal | Year: 2014

The edge joints in the SRC hybrid structure for the main building in thermal power plants are classified as strong-beam weak-column variable-column joints. Four 1:5 joint specimens were tested under the low-cyclic reversed loading to study their seismic performance. The results show that damage occurr at the column ends in the T-type strong-beam weak-column variable-column SRC joints. The seismic performance of this kind of joint is poor, but if short-leg shear walls are built up along the two orthotropic horizontal directions in the abnormal SRC column-RC beam joints, the failure mode will change to the edge beam damage which is favorable for the anti-seismic design. The ductility and energy dissipation of the SRC column-SRC beam joints are better than those of the SRC column-RC beam joints. However, compared with the SRC column-RC beam joints, SRC column-SRC beam joints do not have higher strength due to the failure mode. The bearing capacity, hysteretic performance as well as deformation and stiffness characteristics of the joints can be significantly enhanced when the short-leg shear walls are introduced, and these enhancements are even more effective if the short-leg shear walls are built up both longitudinally and laterally. In this way, the characteristics of the strong-beam weak-column joints can be improved effectively. This new kind of joint is worth popularization and application in building construction.


Yuan L.,Xi'an University of Architecture and Technology | Li X.,Xi'an University of Architecture and Technology | Bai G.,Xi'an University of Architecture and Technology | Kang L.,Xi'an University of Architecture and Technology | Li F.,Northwest Electronic Power Design Institute
World Information on Earthquake Engineering | Year: 2012

The finite element model of large diameter prestressed concrete circular coal silo was built by software ANSYS. Based on the assumption of constant mass distribution of stored material in height direction, the applying mass element method was used to simulate distribution of stored material. The force and deformation analysis of prestressed concrete silo under earthquake load action was carried out. The mechnical and seismic performances of prestressed concrete soil structure and the feasibility of simplified calculating method for earthquake action were analyzed. The results show that horizontal seismic action has not obvious effect on circumferential stress of prestressed components, the prestressed concrete silo has a good lateral force-resistant performance, when the choice of fundamental modal coefficient is reasonable, the evaluation of horizontal seismic action with base shear method is feasible. The results presented could give a reference to seismic analysis of similar siloes.


Bai G.,Xi'an University of Architecture and Technology | Li H.,Northwest Electronic Power Design Institute | Bai Y.,Xi'an University of Architecture and Technology | Zhao C.,Northwest Electronic Power Design Institute
Tumu Gongcheng Xuebao/China Civil Engineering Journal | Year: 2011

The concrete structures for thermal power plants hardly satisfy the requirements for highly seismic regions, a new hybrid structure of RC scattered shear wall-SRC frame is proposed. Pseudo-dynamic and pseudo-static tests are conducted for a 1:7 scaled model structure. According to the test results, the hysteretic response & energy dissipation capacity, ductility & stiffness degradation of the model structure under El-Centro (N-S) horizontal earthquake motion are studied. The results show that the structure has much better hysteretic behavior and energy dissipation capability than traditional reinforced concrete structures, and the scattered shear walls and steel reinforced concrete columns in the model structure obviously improves its ductility and energy-dissipation capacity.


Bai G.-L.,Xi'an University of Architecture and Technology | Bai Y.-T.,Fukuoka University | Li H.-X.,Northwest Electronic Power Design Institute | Zhao C.-L.,Northwest Electronic Power Design Institute | Zhu L.-H.,Xi'an University of Architecture and Technology
Gongcheng Lixue/Engineering Mechanics | Year: 2011

A scattered shear wall-SRC frame-bent hybrid structure is a new structure system which could satisfy a higher aseismic requirement in large-scale thermal power plant. A 1:7 scaled specimen which had three-span seven-layers were subjected to conduct the pseudo-dynamic and pseudo-static tests. An experimental study was focused on the mechanical properties, hysteresis, deformations and cooperative work performance, etc. The experimental results showed that the cracks of this type of irregular structures were widespread and exhibited an obvious weak layer which was mainly located at the stiffness mutation positions like the upper shear walls, column variable cross-sections and abnormal joints. The structure finally destroyed as the beam side-way ductility failure mechanism. As a result of the influences of the scattered shear walls and SRC columns, performances like ductility and failure modes of the structure were improved substantially. The test results indicated that the prototype structure could satisfy the demand of the aseismic design in 8 intensity zones or higher, the aseismic performances were improved remarkably compared to the homogeneous traditional RC frame-bent structures.


Bai G.-L.,Xi'an University of Architecture and Technology | Li H.-X.,Northwest Electronic Power Design Institute | Bai Y.-T.,Xi'an University of Architecture and Technology | Zhao C.-L.,Northwest Electronic Power Design Institute
Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology | Year: 2010

In order to improve the seismic behavior of the main power building concrete structure in large-scale thermal power plant under the earthquake-proof high-intensity zone, proposing a new hybrid structure system of the scattered shear wall-section steel concrete (SRC) frame-bent. Doing pseudo-dynamic test on the model structure on the basis of 1/7 ratio. Focuses on the analysis of the destructive process, elastic-plasticity deformation and displacement reaction of the substructure under the EL-Centro earthquake action with different intensities. Besides, analyzing the elastic-plasticity process of the substructure by ABAQUS program. Results indicated that this new structure satisfied the displacement and deformation requirements for 8 degree fortification against earthquakes.


Bai G.,Xi'an University of Architecture and Technology | Kang L.,Xi'an University of Architecture and Technology | Kang L.,Hualu Engineering and Technology Co. | Li H.,Northwest Electronic Power Design Institute | And 2 more authors.
Tumu Gongcheng Xuebao/China Civil Engineering Journal | Year: 2011

Considering the characteristics of a hybrid structure composed of SRC frame columns-RC disperse shear walls, a 1:7 scale model of three spans and three frames is set up to conduct pseudo-dynamic test and pseudo-static test. The results indicate that the hybrid structure can satisfy the fortification requirements of 'no damage in small earthquake, no collapse in strong earthquake', and the displacement-load curve is plump with good energy dissipation capacity and deformation performance, with the turbine-generator operation platform in the weak floor. Overall, the hybrid structure would satisfy intensity-8 seismic fortification requirements for main buildings of large thermal power plants.

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