Abstract: Study on application of steel plate shear wall with silts (SPSWS) about the practical issues in structural design is performed. Backed on a residential house with 11-story by steel frames, the design method and construction details such as elastic simplified model, calculation of elastic stiffness and effect of vertical loads etc are discussed.

1. Introduction

Based on the tests, Toko Hitaka and Chiaki Mastsui has first put forward the concept of steel plate shear wall with silts (SPSWS) in a literature [1] in 2003, and they gave an introduction to its key properties.

SPSWS uses the laser slitting machine, and makes slits on the original integrated steel sheet, with spacing of 100~200 mm, length of 600-1000 mm and breadth of 6~16 mm. The slits direction is consistent with the height direction of the steel sheet wall, which can be separated from the framework column. The steel sheet wall is connected with frame girder with friction-type high strength bolt. The size and construction scheme are shown in Figure 1.

Figure 1. Scheme of the Size and Construction of Steel Plate Shear Wall with Silts (SPSWS)

The providing of vertical slits enables the steel sheet wall to assure no over-size deformation appears in the structure by relying on its relatively large initial lateral stiffness, when the structure encounters the action of minor earthquake and wind load. What is more important, when it encounters a rare earthquake effect, the both ends of column between slits yield, and enter into plasticity due to its suffering higher stress, and further, the plastic hinges are formed to dissipate the seismic energy.

SPSWS has not only good capability in energy dissipation and earthquake-resistance, but also many advantages such as adjustable stiffness, convenience in connection and simple construction. Especially its features of disconnection with columns and split level arrangement etc enable the flexibility in the buildings layout. Therefore, Baoshan Iron & Steel Co., LTD, carried out technical development and the application research in the residential house of steel structure in collaboration with such units such as Tongji University and Beijing SBS Industrialization Housing Engineering LTD and so on.

By now, there are no corresponding mature methods which can be followed in the structural computation of SPSWS. The paper will deal with a residential building of 11-story by steel frames in Wuhan, and based on the test and FEA, it will discuss the structure design problems related to such projects where the SPSWS is used,

2. Introduction of the Project Background

Located in Hanyang, Wuhan city, the project is an 11-story building, with the height of 3 m, spacing of columns 5.6 and 6.3 m. The major structure uses structure steel frame system, and the columns are made of rectangular steel tube, and the beams are made of H section steel. The SPSWS is used to provide part of lateral resistant stiffness required by the structure.

Hanyang of Wuhan city belongs to Class 6 earthquake fortification zone, with category II site soil. The earthquake effect is not large, and the elastic inter-lamination shift is basically dominated by the wind loading conditions. Therefore, the SPSWS in it is treated as that in elastic stage, and only the elastic stiffness is thought and used.

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