Study On The Performance Of Filler Wall Steel Frames Construction Under Load

Many achievements have made in the research and application of structure steel since almost one hundred years ago. But there is little research about fill wall with frame as a lateral resistant member, and there are correlative clauses about there in steel structures Design Specification (GBJ17-88). There is a few consideration of the masonry infill panel's contribution to the lateral resistance of steel frame under calculation; actually, the load bearing of the masonry-infilled steel frame is far from the bare frame for the interaction between the panel and the frame. So the study of it possesses important theoretic and engineering reference value. This paper researched steel frame construction of filled wall effect on the whole stress performance from many parameters in order to coordinate the relationship between the structure's strength rigidity and ductility, It is very meaningful to direct design.The paper researches studies the performance and fail mechanism of filler wall, steel frame construction under monotone and circle loads, and the effect of performance about filler wall steel frame with axial-press ratio, depth-span ratio, friction factor of contact plate, filler wall material coefficient. It got some main conclusions: the filler wall of steel frame as a baroclinic brace restraint the horizon displacement of frame structure. It effectively enhances the rigidity and bearing capacity of structure as a lateral resistant member. The filler wall steel frame has an obvious slipping phenomena and well power-wasting nature under circle load. The stress surface region of filler wall and crack is mostly centralizing at stress direction of diagonal. The equivalent effective stress of this region is comparatively small. The stress concentration phenomena focus on the corner of filler wall and the connection of part between beam and pole under earthquake load that will damage firstly. The reduction of bearing capacity is aroused by the destruction of filler wall. As a mostly bearing structure, the steel frame doesn't damage at this time, showing that structure have great safety margin. Furthermore, when filler wall is at damage moment, structure may carry over using below exchanging filler wall, and the bearing capacity frame have little infection. The node of filler wall steel frame has complex bearing, for the request of earthquake-resistance design should"powerful node, weak construction". It should restrain the width-thick ratio of steel plate at node region, increase the width of steel plate at node region, or install ribbed stiffener, to stiffen node region. The change of axial-press ratio has less infection for the bearing capacity, deformability and ductility. Filler wall can recede the infection of P-Δeffect. When axial-press ratio of structure is less than 0.4, all of bearing capability is good. The structure shows better power-wasting ductility and earthquake-resistance capability, when depth-span ratio of structure is larger than 0.5. With development of felt coefficient between filler wall of steel frame, the limiting load is small, but original rigidity is accretion, ductility capacity appear deterioration.The paper analyzes bearing capacity of steel frame construction of fill wall under the monotone circle load deeply. It is valuable to modify related codes, and to direct practical engineering design. It is a good foundation for earth-quake resistance of filler wall steel frame construction.