Research On The Wind Resistance Of GLC Siliceous Lightweight Wallboard

As the country attaches great importance to the problem of building energy consumption and the industrialization of construction is strongly advocated,the assembled building with energy-saving features has become a research hot spot in the field of construction.As a systematic project,the prefabricated parts of assembled building can be standardized and produced,which can effectively avoid the environmental pollution problem at the work site,accelerate the project progress,reduce the manpower demand,and meet the requirements of green energy conservation in the construction industry.However,the peripheral wall system is a key part of it,but the research is not yet perfect,which seriously limits the development of assembled buildings and becomes an urgent problem to be solved.GLC siliceous light wallboard,as an energy-saving and environment-friendly wall material,is in line with the national direction of promoting the development of green building materials,and has good economic value,environmental value and social value,and can be widely promoted and applied.When GLC siliceous light wallboard is used as a peripheral retaining wall in prefabricated buildings,its mechanical performance under two horizontal loads is mainly considered.Wind resistance under out-of-plane wind loads.Therefore,the full-scale GLC siliceous light wallboard is used as the research object,and the wind resistance test of GLC siliceous light wallboard is carried out by applying uniform load instead of wind load.The main work and results are as follows:1.Briefly introduce the development process of building wall materials,as well as the research status of various composite wall panels at home and abroad,and make a summary.2.The GLC siliceous light wallboard is composed of polypropylene fiber mortar as the surface layer,siliceous foamed cement as the middle layer and reinforcing materials.The material performance test of the wallboard is carried out to obtain the compressive strength and resistance of the mortar and foamed cement.Material mechanical parameters such as tensile strength,elastic modulus,and Poisson's ratio are the basis for subsequent research.3.In order to study the wind resistance of GLC siliceous light wallboard,seven groups of wallboard specimens with different test parameters were designed to study the damage process,crack development and force characteristics under uniform load,as well as the effects of composite layer thickness,number of composite layers and reinforcing materials on the wind resistance of the wallboard.The results show that the GLC siliceous light wallboard under uniform load undergoes elastic stage,elastic-plastic stage with crack work and plastic stage;the deformation of each group of specimens near the damage is significant,indicating that the wallboard has good ductility;the single-layer core material S-type wallboard is bending damage,and the three-layer core material C-type wallboard is bending-shear damage;the bearing capacity and stiffness keep increasing with the increase of wall panel thickness,but the ductility slightly decreases.Among them,compared with silica foam cement,the change of polypropylene fiber mortar thickness has more significant effect on the crack resistance bearing capacity.4.Theoretical analysis of wind resistance performance of GLC siliceous light wallboard.In order to calculate the cracking deflection and crack-resistant bending moment of the wallboard,the equivalent theory of the composite plate is proposed,and the theoretical formula is deduced accordingly.Design provides the basis.In addition,the applicable height and wind resistance grade of the wallboard under the limit state of normal use are analyzed,and it is proved that the GLC siliceous light wallboard meets the wind resistance bearing capacity and deflection deformation limit required by the specification,and has a high safety reserve,which can be used as a prefabricated building exterior.Wall panels are used.It is recommended that wall panels with a thickness of 180 mm and 200 mm be used in the outer protection system of residential buildings below 100 m and industrial plants below 30 m,with high reliability.