Abstract
Due to the demand of manufacture technology, the main factory building forms intricate frame-bent structure, many abnormal joints with strong beam-weak column and changed beam and changed column. The bearing mechanism of abnormal joints is very complex, and design of those joints becomes the hard point in the design of large-scale thermal power plant. In order to improve seismic behavior of the thermal power plant frame-bent structure, the research group put forward SRC frame-RC dispersive short-pier shear walls mixed structure, and carried out SRC frame-dent structure sub-space model test. Based on the sub-space model test, the paper chose four typical SRC abnormal exterior joints to take the experimental research. Through the pseudo-static test of the joints, this paper mainly analyses the force-transmission path and bearing mechanism of the SRC abnormal exterior joints, and studies on the main factors which affect the shear capacity of joint. Besides, it puts forward some detailing requirements. Those may be references for practical design.
Highlights
SRC abnormal exterior joint refers to the joint with high beam, varying column cross-section and some short-pier shear walls laid in the part of the bottom house
The test study is based on the studies of seismic behavior of 1000MW generator set main plant three-bay, three-span SRC frame-bent subspace model containing the house with steam engine, the room with deaerators and coal bunker
1) In SRC frame-tent structure, the longitudinal steel reinforcements and stirrups are needed to form steel skeleton which can bear part of the load, and bind the deformation of the internal concrete, while the concrete ensure the stability of the steel
Summary
SRC abnormal exterior joint refers to the joint with high beam, varying column cross-section and some short-pier shear walls laid in the part of the bottom house. Such joints are widely used in industrial and high-rise buildings. To ensure shear failure of the abnormal joints doesn’t happen before the structure reach the ultimate capacity state, we need to fully understand bearing and deformation behaviors of the joints. Our research group carries out the test study on bearing and deformation behavior of SRC abnormal exterior joints under the influence of the low-cycle repeated load
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