Research Progress on Cracking Mechanism,Evaluation and Reinforcement of Ancient Building Timber Members
As one of the most common damage types in ancient timber structure,cracks affect the service performance of timber members and are important evaluation contents on the stability and safety of ancient timber buildings.This paper systematically reviews the research on the cracking damages in ancient building timber members from the aspects of status,causes,effects,evaluation method,repair and reinforcement.It is found that the major reasons for the cracks of timber members in ancient Chinese buildings are wood shrinkage and stress damage.The primary cause of cracking is wood shrinkage along the grain.Cracks may reduce the mechanical properties of timber members and creates conditions for other unfavorable factors to harm timber members.At present,the effect of cracks on the performance of timber members is mostly evaluated by in situ tests and numerical simulations.The cracked timber members are repaired and strengthened by using metal materials,fiber-reinforced polymer(FRP),and polymer resin materials.However,due to the particularity of ancient buildings and the variability of wood,it is necessary to further explore the cracking mechanism,develop the detection,evaluation,and reinforcement methods suitable for cracked timber members,and establish a scientific protection system for ancient buildings.
ancient building timber membercracking mechanismrepair and reinforcement
万方数据
维普
