| At present, construction industry is one of the important industry to promote the economic development of our country, the traditional extensive mode of construction can cause environmental, quality, waste, and many other problems, do not conform to the requirements of the five-year sustainable development strategy in China. Precast structure due to energy saving, environmental protection, high construction efficiency, etc, become a national support implementation of a new type of green building structure. To carry out precast structure to the market, and applied to practical engineering, many specific problems have to be solved, such as the structure of the split form, reinforcement structure, thermal insulation, waterproof, earthquake and other issues, especially to apply precast structures in earthquake zones, the extent of the study is very necessary, otherwise the application will encounter a lot of unnecessary trouble, and even lead to serious consequences. In this article in view of one kind of the precast structure-precast frame-shear wall structure, carry on the overall seismic performance research and analysis, basically has the following contents:The first part, with a three floor three-span concrete frame shear wall structure as the calculation model, using the general finite element software ABAQUS respectively established precast model and cast-in-place model, analyzing them on the low cycle reciprocating loading, researching their respective failure mechanism, hysteresis, ductility, energy consumption performance in the process of loading, and make comparison research, analysis of the similarities and differences between them. Results show that considering the joint surface frictional contact the bearing capacity, initial stiffness and hysteretic energy consumption of each hysteresis loop is less than cast-in-place concrete structure, but displacement ductility is greater than cast-in-place structure.The second part, using the same calculation model, make time history analysis of precast and cast-in-place structure using the finite element software ABAQUS, and study stress and damage, displacement response and base shear, acceleration under different seismic wave, and compared with cast-in-place concrete structure. Results show that under the same seismic effect, base shear, dynamic magnification of precast structure is less than cast-in-place concrete structure, displacement response is greater than the cast-in-place concrete structure.Finally comprehensive analyzing the results of precast frame shear wall structure of quasi static analysis and dynamic time history, I draw the conclusion:bearing earthquake shear largest and the most easily damaged parts of precast frame shear wall structure is the first floor of shear wall. We should take corresponding measures to strengthen the structure when design, and guarantee the seismic principles of "no collapse or no damage to buildings under severe earthquake" under strong earthquakes. |
