| Dong nationality is one of the nationalities with unique cultural characteristics in our country.It used to live in a relatively remote area.It had little contact with the civilization of the Central Plains in ancient times and hardly suffered from the influence of large-scale war in history.As a result,its national culture has been inherited completely.Many ancient Dong buildings with high artistic value have also been spread to the present day,especially the Dongs Fengyuqiao and Drum Tower.It contains abundant cultural and artistic values and embodies extremely high technological values.It is the architectural treasure formed under the joint action of Dong people's living customs,historical development,culture and art,economy,science and technology,religious beliefs and other factors for thousands of years.At present,Dong's village buildings are applying for the United Nations World Cultural Heritage.Because there are still some Dong's areas with inconvenient traffic,little outside knowledge of Dong,and some of them are out of repair for a long time,how to better elaborate the cultural value and scientific research value contained in Dong's ancient buildings and how to better protect Dong's ancient buildings has become an urgent need nowadays.One of the problems to be solved.In the first and second chapters of this paper,combined with the history and traditional culture of the Dong nationality,the influence of the natural environment of the Dong nationality living area and the humanistic environment of the Dong nationality society on the elements and construction technology of the Wind-Rain Bridge is discussed,and the construction process of the traditional Wind-Rain Bridge is excavated,sorted out and restored.The purpose is to publicize the culture,art and technology contained in the Dong nationality's architecture,and to provide a basis for the finite element analysis.? Chapters 3 and 4 build a 1:1 model of Dong Wind-Rain Bridge in Abaqus system and use finite element analysis method to analyze and study it.The conclusion is that the load limit of each beam-column group on the top of the gallery is 1 ton.Therefore,it is suggested that debris accumulated on the top tiles of the gallery and bridge tower should be cleared in time to maintain the load of each beam-column group less than 1 ton.The ultimate distance of horizontal displacement at the bottom of the column is 30 mm.Therefore,when strengthening and protecting the gallery column,the distance of relative displacement between tenon and mortise joints should be restricted,and the wood at the tenon-mortise joint should be waterproof,sunscreen and anti-corrosion.The ultimate load of the bridge deck is 24.96 tons(adult weight).Therefore,the number of people on the bridge deck between the two piers should be limited to less than 200;the ultimate load-carrying capacity of the beam and bridge slab between the two piers is 1.32 tons,so the total weight of a single passing vehicle should be limited to less than 1.3 tons;besides the Chengyang Fengyu Bridge with Chinese fir texture,a pine texture model with the same structure size is established for finite element analysis to simulate the wind test.The ultimate bearing capacity of rain bridge is to find out the location where the components of Dong wind-rain bridge are vulnerable to damage,and accordingly to put forward corresponding suggestions for the protection of wind-rain bridge,at the same time to provide a set of management data for strengthening the traffic safety of wind-rain bridge,and to provide data support for the establishment of Dong Folk Park and other projects with wind-rain bridge buildings in areas with more pine trees in northern China.Finite element analysis is the focus of this paper.The analysis and conclusion of this paper have important reference value for cultural relics protection units and related engineers and technicians,and can also provide theoretical support for Dong architecture to apply for the United Nations World Cultural Heritage. |
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