Numerical Simulation Of Cracking For Basement Concrete Structure Of A Square

In recent years, possession rate of car rose sharply in large-sized and middle-sized cities in China. The construction of the underground garage has become the preferred scheme to solve the problem of vehicles parked, mainly because of the low cost and does not affect the use of floor space. However, due to the reasons of design flaws and ground construction planning unreasonable, part of the underground garage in use process may appear in overlying soil pressure overload problem, affecting the stability of the concrete structure of underground garage, such as cracking phenomenon in concrete structure, thus causing the engineering quality defects even ground collapse. Therefore, studying the causes of cracking of underground concrete structures and the treatment measures of reinforcement schemes are of great significance to assure the safe use of the underground garage, to prevent concrete cracking, thus improving the structure durability.For the study of the underground garage top surface turns the soil pressure on the impact of the garage structure bearing, through the simulation of a underground garage by using the finite element software ABAQUS, the load-bearing mechanism of plate-beam-column system is studied, the load transfer mechanism of garage framework structure and component force mechanism is analyzed, and the top pressure on the impact of garage structure is revealed. Reinforcement scheme is presented combined with the practice engineering for concrete column cracking.Test results show that:(1) the stress distribution of the whole structure of the garage is related to earth pressure size and distribution form as well as the material properties of concrete columns and other factors. and beam-column joints is the most easily damaged parts of the garage overall structure;(2) the steel of garage structure column has a distribution form of middle large and surrounding small, and the maximum stress value has a tendency to decrease under the effect of non-uniform distribution load;(3) structure stress concentration is not obvious at steel of beam structure and steel of board, the stress distribution is also not uniform when under the effect of non-uniform distribution load.