The Influences Of Lightweight Partition Wall Panel On Natural Vibration Period Of Frame Structure

The lightweight partition wall or masonry filling wall is a very important non-structural component in the reinforced concrete frame structure.Due to the large proportion of lightweight partition wall or masonry infilled wall in the structure,it has a negligible influence on the overall stiffness and seismic action of the main frame.According to the relevant current norms,we know that the natural vibration period of the main structure in the analysis of seismic design needs to be reduced by its periodic reduction coefficient.Scholars at home and abroad have done a lot of research on the influence of masonry infill wall on the natural vibration period of structures,and they have achieved fruitful results.At present,the new type of wall material is gradually replacing the traditional filling wall material with the development of wall reform.It is becoming more and more popular with its advantages of light quality,energy conservation,soil protection and environmental saving,etc.However,It has not been stipulated clearly that these new walling to select the different wall material,different arrangement form,and different the connection mode from the main structure on the natural vibration cycle and the overall stiffness of the structure.Therefore,more and more attention is paid to the seismic fortification of the structure.It is becoming more and more important and urgent that the influence of the new wall material on the natural vibration cycle and the overall stiffness of the frame structure.This article is based on the number of floors,different filling wall materials,filling rate,modulus of elasticity,density and the thickness of partition wall,the following research work is done for the new lightweight wallboard and the filling wall of reinforced concrete frame structure on the periodic reduction problem:(1)The paper narrates the theory and empirical formula of the vibration period in the frame structure;Different countries' are summarized on the experience formula of the natural cycles calculation,and the corresponding comparison.The influence of building height orbottom width on natural vibration period is considered only in the existing empirical formula,but the influence of other factors on the natural vibration period of the infill wall is not considered in most countries,including our country.(2)This paper uses the ABAQUS finite element software to create the steel frame structure model of the lightweight partition wall panel to simulate the side-resistance performance of the structure.The analysis results show that the wall filling can improve the overall framework of the initial lateral stiffness in some degree.(3)This paper focuses on the influence of the number of floors,material,filling rate,modulus of elasticity,density and thickness of the wall material on the self-vibration period of the structure.According to the changes of different influence factors,different models of calculation and analysis are created to modal analysis,we sum up the results of the calculation,and get light weight partition wall panels and masonry infilled wall on the influence law of structural natural vibration period preliminary.The range of value of the proposed structure self-oscillation period is given by the obtained rules.