Seismic Performance Research On New Fabricated Pre-cast Hollow Slab- Steel Frame-shear Wall Hybrid Structure

With the rising of domestic construction market, the disadvantages of cast-in-place concrete structure have been increasingly sharpened. Given this, industrialization, fabrication and fining will be an inexorable trend in development. According to several relevant researches, there are differences between prefabricated structure and cast-in-place concrete structure in integrality and earthquake resistant behavior. Hence, how to improve economic rationality is vital problem for domestic construction to solve.Based on a new prefabricated structure put forward by research group, which welds dignoal brace under prefabricated slab and has reliable connection in beam-plate and plate-plate joints. Contraction scale model tests combined with FEM analysis are researched as follows:(1) Beam-plate nodes, beam-column nodes, beam-wall nodes, slab joint nodes have been well-designed, and four quarter-size test models are constructed, named steel frame-shear wall structure with horizontal X-brace as SJ1, new prefabricated hollow slab-steel frame shear wall hybrid structure with horizontal X-brace as SJ2/SJ3(without post-cast strip), and cast-in-place plate-steel frame shear wall hybrid structureas SJ4 prospectively.(2) Pseudo-static comparing test during elastic stage is done with SJ1 and SJ2. The test shows that new prefabricated hollow slab has good integrality which can be a unified whole structure with steel frame-shear wall to bear horizontal forces, and X-brace as well as prefabricated hollow slab is efficient to transfer horizontal shear forces.(3) In-plate mechanical property is analyzed on new prefabricated hollow slab using SJ2 whose whole lateral stiffness matrix and in-plate deformation matrix are obtained. Analysis shows that in-plate deformations of prefabricated hollow slab are negligible with node design method aforementioned with 0.1g earthquake acceleration(7 degree earthquake fortification intensity), floor slab can be regarded as approximately rigidity in seismic design.(4) Pseudo-static comparing test during elastic stage is done with SJ3 and SJ4 and failure stage with SJ4. As predicated, X-brace improves the integrality and anti-seismic behavior of prefabricated structure. During elastic stage, the integrality and anti-seismic behavior of them are approximately equivalent.(5) SJ3 and SJ4 are compared by simulated with ABAQUS. On the basis of test results, suggestions are as follows: region where has lower requirement of aseismic fortification(lower than 8 degree) is good to use X-brace instead post-cast strip in prefabricated slab, other requiring higher aseismic fortification(higher than 8 degree) had better to maintain post-cast strip.