Abstract
To prevent the wooden door frame of traditional rural houses from being stuck due to diamond deformation under earthquake and improve the seismic capacity of rural houses, an innovative method of reinforcing the angular displacement of the wooden door frame with channel steel and the diagonal brace is proposed. The rationality of the finite element simulation is demonstrated by comparing the results of finite element simulation and quasistatic test based on reinforced and unreinforced wooden door frame specimens. On the basis of the finite element model of wooden door frame, the seismic performance of channel type and diagonal brace thickness of reinforced wooden door frame and the seismic performance of friction coefficient of unreinforced wooden door frame are studied, respectively. The results show that the lateral stiffness and the lateral bearing capacity of the reinforced wooden door frame increase with the increase of channel steel type and the diagonal brace thickness. The height of the channel steel section of the seismic reinforcement structure should be half of the unreinforced structure. With the increase of the friction coefficient, the lateral bearing capacity of the unreinforced wooden frame increases, while the ductility of the unreinforced wooden frame decreases.
Highlights
At present, the seismic research on residential houses is mostly concentrated in cities and towns, while the seismic research of traditional rural houses is relatively unpopular
The seismic reinforcement of houses was basically the reinforcement of maintenance structures, and the reinforcement method belongs to the overall stiffness reinforcement, which requires a lot of funds, while the proportion of funds invested in earthquake resistance and disaster reduction of rural houses in the country is small
Based on the ancient timber structure that has been damaged by the earthquake, the seismic performance of the structure after repair with CFRP was studied [5]. e fiberglass pultruded rods were inserted from the bottom to the top of the timber beam, through areas of damage, to overcome the loss of shear properties [6]
Summary
The seismic research on residential houses is mostly concentrated in cities and towns, while the seismic research of traditional rural houses is relatively unpopular. The research on mortise tenon joints, overall seismic performance, and reinforcement of traditional wooden structures in ancient buildings has been mature and systematic. Based on the static loading test and low-cycle reciprocating loading test, the seismic performance of wooden frames in traditional Korean ancient buildings was studied [20]. E wooden door frame of traditional wooden houses has the security problems of weak connection of tenon and mortise joints and insufficient lateral seismic capacity; the innovative seismic reinforcement method of wooden frame structure of the escape passage with channel steel and the diagonal brace is put forward, which changes the traditional overall stiffness reinforcement to the joint angular displacement reinforcement. Based on the finite element model, the influence of parameters such as channel steel type, the thickness of the diagonal brace, and friction coefficient on the seismic performance of the wooden door frame is discussed
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