The Static And Dynamic Analysis On The Tibetan Ancient Timber Frame And Its Reinforcement Methods Research

The status of Tibetan architecture in Tibetan culture is indispensable.On the basis ofstructure system,The timber frame structure system has a high value of art,history and science.Due to the long history of building and the natural and man-made influence on them,seriousdamages have incurred.Experts at home and abroad have been researching more on Tibetanarchitectural shape, decoration, structure performance,etc, but they do little research on thestatic and dynamic analysis of the structure and the structure reinforcement,comparatively.This paper uses finite element software MIDAS FEA computer data simulation, makingan analysis of finite element nonlinear static and dynamic on the structures.In the dynamicanalysis,That the timber frame columns with different layers of CFRP cloth on both sides forreinforcement,pressing on the different intensity of seismic waves and conducting analysis ofperformance comparison;In the static analysis,according to the need of inspection andevaluation of the damaged points on roof structure in the ancient timberwork technicalspecification for maintenance and reinforcement,Taken a uniformly distributed load,makingthe structural deflection overrun, Having reinforced the bottom of the beam of wood structureby reducing the deflection.In this paper, reinforcing the bottom of the beam of timber framewith different layers of CFRP cloth and different thickness of steel,and making comparableanalysis of the structure’s deflection, stress and strain.In the effect of Centro-EI wave, as the seismic wave peak increased, the lateraldisplacement of the whole unreinforced structure will also increase, but at the peak of0.3gunder the action of earthquake, the lateral displacement of the structure is not big, suggestingthe structure’s strong seismic ability to the effect of the horizontal earthquake.Through thedynamic analysis on both sides of column with which CFRP reinforced, finding that theinfluence on its lateral displacement is very small.Analyzing reinforcement under the surface of the structure beam,beams reinforced withCFRP,its vertical displacement is lower,Reinforced with more layers of CFRP,the size of thereduction increased more,There have influences on the stiffness of the structure oncereinforced with CFRP,but there is still little change on the deflection of the structure afterreinforced with7layers of CFRP,the deflection value of the strcture cannot be improvedthrough reinforcement significantly,considering economic construction,so with CFRP cloth toreinforce the structure so as to improve the effect of the deflection is not ideal,it is notapplicable.With steel reinforcement to increase its deflection is very big, the structure reinforcementof1mm steel sheet can reduce22.51%of the vertical displacement,controled the deflectionof a beam,it is more than19times increase than with a layer of carbon fiber cloth reinforced, making the damaged deflection of the beam in this paper,under the normal use withinpermissible deflection range value.The reinforcement effect is obvious.The thicker the steelplate is,the bigger the increases.With the method of the steel reinforcement of the beam isfeasible,and with3mm thick steel plate is optimal.