The Investigation And Research Of The Ductile Failure Mode To Multi-Layer Masonry Structure

Went to Wenchuan earthquake zone, the earthquake damage was investigated in Mianzhu, Hanwang, Dujiangyan, Wenchuan, Yingxiu. The main earthquake damage of multi-layer masonry structure housing is understanded comprehensively. The ductile failure mode in the wall below the window is researched deeply.This paper introduces the seismic design method of multi-layer masonry structure detailedly. To summarize and evaluate the current structure design codes, it is the discovery that the ductile failure mode in the wall below the window has many advantages compared to the destruction of the wall between the windows. The vertical load under the continuous non-vertical wall is small, and it is easy to repair after damage. When the wall below the window is destroyed, seismic energy is dissipated. When the wall below the window disintegrated, the internal force is redistribution. The wall between the windows together with the wall under and below the wall between the windows undertake the earthquake commonly, and the structure can not collapse instantaneous. To make structure shows more ductility properties, it is is a kind of ductility failure mode.Analog wall-frame structure design principle and method, The analysis model of multi-layer masonry structure under horizontal earthquake effect is established. Considering the influence of shear deformation and bending deformation to the wall between the windows and the wall below the window, mechanical analysis and calculation of internal forces is conducted using rod structure mechanics. The formation conditions of ductile failure mode to multi-layer masonry structure is proposed, and the recommended value of deformation modulus is given.