Finite Element Analysis On Filure Of The Structure Of Window Under Earthquake Action

Many important structures of housing construction in china, such as gables and other load-bearing structure, mostly brick material. The brick masonry and other materials collectively referred to as rock-like materials with brittle nature of the structural load-bearing wall to form a quasi-brittle characteristics of the whole, likely to occur under the dynamic brittle failure.Traditional finite element method, is built on the basis of the continuity assumption, can not simulate the structure formed after tensile fracture is not a continuous state, so the structure can not deal directly with tensile failure problems under dynamic simulation of non-continuum damage study is even less.The language is a finite element finite element method to solve partial differential equations modeling language, the use of finite element program written in this language, and its main job is to write differential expressions and finite element method, and then by the language generator a high-level language automatically generated finite element program.Based on the tensile fracture criterion for brittle materials, fracture criterion proposed unit, through the FORTRAN language routines through a triangular element cracking.Relative to the method used, the seismic acceleration boundary constraints considered, according to Newton's second law, which the whole structure a reverse force is applied. Cracking mechanism based on dynamic studies, simulations under different structural forms load-bearing walls form dynamic stress field change, and analyze the seismic load transient tensile brittle failure under stress. On a single form, the form of three two-form and multi-structure analysis of seismic wave acceleration time history in the process of change, the form structure corner stress concentration, the tensile and compressive stress will be changed and re-distribution . The maximum tensile stress cracking point, and the larger the value of earthquake acceleration, the higher the level of tensile stress, eventually produce the initial tension cracks, with the expansion of regional tension, the crack extends to the internal structure, showing X-shaped tensile of crack texture, leading to form structural damage.