Design and Research on Composite Steel and Concrete Frame-Core Wall Structure

Abstract eng:
This paper presents the design, research and related joints’ details of a 31-story composite frame-core wall structure, which is located in Beijing City, a region of seismic fortification of 8 degree. In order to improve the ductility，bearing capacity of the core walls and to ensure inelastic deformation capacity of the longitudinal coupling beams carried steel trusses, proper steel frames were embedded within the longitudinal core walls. The results of elasto-plastic time-history analysis under the action of rarely occurring earthquake are very close to the data of shaking table test. Experimental results show that there are no obvious cracks in the core walls, spalling of concrete and local buckling of reinforcement at the bottom of the core wall’s boundary elements and the composite columns at the perimeter have not been observed, even the elasto-plastic story drift angle has reached 1/101, the whole structure has better seismic performance. However, higher strain measurement of the floor beam end during the rarely occurring earthquake shows partial restraining moment should be considered at the connection.

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