On Non-load Crack Problem From Cast-in-Place Reinforced Concrete Floorslab In CAPF Barracks

With accelerated development of the Chinese Army's Modernization process,the APF(Armed Police Force) barrack construction has made substantial progress.Series of advanced and mature scientific achievements have been applied and various barracks using new craftwork,new materials and new techniques have been built, greatly yielding both military and economic benefits.The emerging new military structures meet CAPF various needs,gradually improving the training,working conditions and living standards of CAPF officers and men.Meantime,there exist troublesome engineering problems in some projects.Among them,the problem of Non-load crack of cast-in-place reinforced concrete floorslab is especially the case. Cast-in-place reinforced concrete floorslab is widely used in industrial and civilian structures and its crack problem frequently occurs in projects.In the past decade,in CAPF barrack construction where the floor work has gradually transformed from prefabricated concrete floorslabs in the past to the present cast-in-place reinforced ones, the crack problem has become one of engineering hotspots in quality complaints.This dissertation conducts experiment and theoretical study about the above-mentioned problem.First,it systematically expounds the features and types of cracks,and analyses the typical floorslab cracks in several CAPF affordable buildings and elicits its definition and reasons for engendering the cracks.Second,it comparatively studies the cracks of cast-in-place reinforced concrete floorslabs of some mixed-structure barrack in the case of different boundary conditions(simply supported and bearing supported) and analyses the effects of structural stiffness on non-load cracks of the cast-in-place reinforced concrete floorslabs.Third,it sums up the general law concerning cast-in-place reinforced concrete floorslabs of mixed-structure barracks and puts forward related measures dealing with the cracks in cast-in-place reinforced concrete floorslabs of mixed-structure barracks to provide valuable reference to control the cracks from both designing and constructing factors.