The Development And Performance Study Of The Connection Between Lightweight Exterior Wall And Steel Frame

In recent years, with the implementation of housing industrialization, steel structure as the fine structural style of precast structure, has been widely used in residential building, comparing with the traditional structure, the steel structure has the advantages in the aspects of function, design, construction and integrated economy, but there are two main difficulties plagued the development of the steel structure residential housings:first is the lack of the envelope system that matched with the steel structure residential housing system, secondly, although some steel structure residential housings have been finish in our country, we are still lack of systematic research according to the development of steel structure residential housings in our country, thus to promote the steel structure residential housings, the effective connection of envelop enclosure and steel frame is particularly important.Through the analysis on the domestic and foreign existing connection between exterior wall and steel frame, the new effective connection has been developed, the new connection is flexible connection between exterior walls and steel beams, prevents the bolt running through exterior wall, avoids the damage of the exterior wall and the steel framework caused by different of the thermal expansion and cold shrinkage, which makes the lifetime of connection lengthen, clear force-bearing, high bearing capacity, reliable, try to reduce site wet construction; through the theoretical calculation, to determine the weld size of connection and specification of the bolts.This paper the exterior wall is AutocCaved Lightweight Concrete(ALC) wall panel, carry out monotonic loading and cyclic loading test, analyze the load-displacement curve, cyclic loading hysteretic curves, skeleton curves, rigidity degradation curve, ductility and energy dissipation capacity.The results show that, the connection has the good performance under monotonic loading and cyclic loading, the mechanical characteristics at different stages are clear under monotonic loading; effectively obtained the ultimate bearing capacity of the new connection by winding the ALC panels with carbon fiber cloth. Under the low cyclic loading, showed the good anti-seismic performance of connection, "the wall first, the connection second", this failure types is relatively safe for connected seismic, through calculating the equivalent stiffness of the specimens, obtained that for the same panel thick connection, the initial stiffness of the ALC panels without winding with carbon fiber cloth is 1.19～1.96 times the wallboard winding with carbon fiber cloth; ductility coefficient of the connection is higher, is in the range from 3.954 to 7.843, connection also enjoys the good dissipation capacity (the energy dissipation coefficient E is in the range from 0.81 to1.83).Through comparing the specimens that ALC panel winding with or without carbon fiber cloth, can obtain the ultimate bearing capacity of the connection and ultimate bearing capacity with ALC panels under cyclic loading, which provided the theory basis for the later connection between steel frame and the other light wall panels through the new connection, also provided the experimental basis for later using ALC panels in the building. The results of the tests under monotonic loading and cyclic loading show the ultimate bearing capacity of the connection and the corresponding displacement meet the requirements of seismic load, wind load and the elastic interstory drift no exceeding 1/250 in 《Code for seismic design of buildings》...