Experimental Study And Finite Element Analysis Of Wind Resistance Performance Of Assembled Wall Panel

At present,our country in the prefabricated steel structure construction industry achievements are remarkable,but in the practical application process,the envelope system often appears the question,has restricted its rapid development.As the most important wall panel in the enclosure system,its safety attracts a lot of attention.In the actual use of the wall panel,it is mainly affected by horizontal actions such as wind load,At present,the performance of most of the enclosure wallboard needs to be further improved,and it can only be used in some areas,not in all parts of the country.Therefore,this paper takes a composite wall panel as the research object,Through test and finite element analysis,and discusses its safety under normal use wind load,applicability in various regions of the country,And analyze the influence of each parameter on its wind resistance performance.The main tasks and conclusions are as follows:1.Carried out the Wind bearing capacity test of 2 pieces of composite wall panels,and the change parameters were mainly whether the bolt-welded connection or not.Observe the whole stress process of the test piece through the test,the failure reason and crack development rule of composite wall panel are analyzed.In addition,the mid-span load-displacement curve,keel strain and applicability of composite wallboard under normal service load are analyzed.The results show that under uniform load,cracks appear in the bottom of the wall panel.The large keel strain in the composite wallboard is larger than that in the small keel strain,and the keel strain of the bolt-welded wallboard is smaller than that of the common wallboard.Under normal service load,the wall panel completely meets the control value requirement of allowable deflection L/250.According to the calculation,the composite wall panel basically meets the wind resistance requirements of most urban buildings in China whose building height is less than 150 m.2.Built with the finite element software different spacing,different thickness of keel,keel keel section size,different strength grade,keel 27 under different parameters such as wall thickness finite element model,analyzes their differences and Influence of wind resistance performance,the results show that the finite element computed across load- displacement curve in good agreement with the test results;The denier the keel spacing is,the smaller the displacement value in the span,the smaller the failure pattern,the smaller the yield domain of the node,and the stronger the wind resistance performance.The keel thickness has no effect on the mid-span displacement,failure pattern and joint area of composite wall panel.The larger the keel section size is,the smaller the mid-span displacement value is and the smaller the failure pattern is.The larger the keel section size is,the smaller the node yield area is.The damage pattern and mid-span displacement of wallboard can be reduced slightly by increasing the keel strength grade.The displacement values of different wall panel thickness are basically the same,and the largest displacement occurs in the span of wall panel;Due to the low elastic modulus,the displacement value of gypsum board under uniform load is the largest and the damage is more serious.