Experimental Research On Seismic Behavior Of Steel Frame With Cavity Sandwich Panel Infill

Many achievements have made in the research and application of structural steel since almost one hundred years ago, and Structural steel has been widely used in the residential building abroad for many years. But there is few research about infill works with frame as a lateral resistant member, and many problems remain to be solved in these aspects, and there are not correlative clauses about these in steel structures Design Specification(GBJ17-88). Infill plays a vital role in lateral resistance, so the study of it possesses important theoretic and engineering reference value.Cavity sandwich panel infill is made of paper triangle cavity material, which is a kind of low density and environmental material. It could increase lateral resistant ability of frame while decrease the weight of the structure. The experimental research for sandwich panel infill steel frame is one subject of 2001'Key Research Subject of China Ministry of Construction, grant No. 01-2 -085. There are three aspects as below on the problems of this subject:1. Two l:2-scale steel frame specimens are tested on their behavior under cycle loading and some cavity sandwich panel infill specimens are tested. The properties of cavity sandwith panel infill steel frame, such as hysteresis characteristics, stiffness, ducfility, failure models and characteristic of dissipation of energgy were gained in the test and compared with ordinary steel frame. The properties of cavity sandwith panel infill is abtained as well.2. On the basis of the experimental research, calculation method of stiffness in different stage, ultimate bearing capacity of cavity sandwith panel infill steel frame are discussed and Aseismic design method on the new lateral resistant system are concluded. This model is implemented into the analysis on the experimental steel frame and the results agree well with experimental results. The design method is presented according to the interacting of infill and frame.3. The parameters of steel frame with infill which affect the lateral, resistant ability, such as panel ratio, frame-to-panel connectors, frame-to-panel interfacefriction, gap between panel and frame and mortar joint bond and friction were discussed. It is emphasized that the reduced location, shape and dimension is very important for the function of dog-bone reduced beam flange and must be paid more attention.Some problems about this research worth to be studied afterward are put up in the end of the paper.