Analysis of seismic pounding between adjacent buildings
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Seismic poundings between inadequately separated buildings have been observed in most previous major earthquakes. Pounding usually caused local damage around the impacting areas, and in extreme cases, collapse of the building structures. AS1170.4-2007 requires the separation between adjacent buildings to be at least 1% of the building height to avoid seismic pounding. This article presents intensive numerical simulations to examine the adequacy of this specification to preclude seismic pounding between RC frame structures under design earthquake loading defined for Perth, and the effects of pounding, if it occurs, on structural responses. It is found that AS 1170.4-2007 in general provides a conservative approach for determining the required separation distances to avoid pounding. Intensive numerical simulations are also carried out to study the effects of pounding on structural responses. Two adjacent RC frame models of 5-storey and 10-storey with different separation gaps and fundamental period ratios are considered. Impact forces, displacements and shear forces of the two frame structures with or without pounding subjected to ground motions corresponding to different site conditions are calculated. The influences of seismic pounding on frame structures are discussed.
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Theoretical investigation of bridge seismic responses with pounding under near-fault vertical ground motionsYang, H.; Yin, X.; Hao, Hong; Bi, Kaiming (2015)Vertical earthquake loading is normally regarded not as important as its horizontal components and are not explicitly considered in many seismic design codes. However, some previous severe near-fault earthquakes reveal ...
3D FEM analysis of pounding response of bridge structures at a canyon site to spatially varying ground motionsBi, Kaiming; Hao, Hong; Chouw, N. (2013)Previous studies of pounding responses of adjacent bridge structures under seismic excitation were usually based on the simplified lumped mass model or beamcolumn element model. Consequently, only 1D point to point pounding, ...
Experimental and three-dimensional finite element method studies on pounding responses of bridge structures subjected to spatially varying ground motionsLi-Xiang, H.; Shrestha, Bipin; Hao, Hong; Bi, Kaiming; Ren, Wei-Xin (2016)Pounding and unseating damages to bridge superstructures have been commonly observed in many previous major earthquakes. These damages can essentially attribute to the large closing or opening relative displacement between ...