Concrete shrinkage and creep can be affected by many factors, including environmental humidity, concrete strength, theoretical thickness, loading age, etc.This paper takes a reinforced concrete column as an example, and reports the parameter analysis using ANSYS on it.The effect of various factors on the concrete shrinkage and creep are discussed and studied.Also, an orthogonal experimental design method is used to analyze the sensitivity of different influencing factors on the concrete shrinkage and creep.The result shows that the environmental humidity is the most effective factor influencing the shrinkage and creep, followed by loading age, then concrete strength, the least effective factor is the theoretical thickness.

For the moment, the most common precast concrete slabs used in projects include SP prestressed concrete hollow slab, double-T plates, and composite slab by steel bar truss and concrete.This paper firstly briefly introduces the recent development of the three kinds of precast concrete slabs.Then the applicability of different precast concrete slabs was summarized in terms of the stress performance, construction measures, calculation methods, and so on.In addition, the selection table of the composite slab by steel bar truss and concrete was proposed in this paper.Lastly, different projects of the three common precast concrete slabs were given.Some conclusions about the applicability of precast concrete slabs obtained in this paper can be evidential references for the design of prefabricated buildings, and assist in solving the problems in selecting precast concrete.