水平加速度作用下古建筑木构架初始运动状态影响因素的研究

Parameters Study on Initial Motion State of Chinese Traditional Timber Structure Under Horizontal Acceleration

为研究传统木构架在水平加速度作用下的动力响应,将木构架简化为平面构架模型,分析水平加速度作用下的4种初始运动状态,并分析径高比、质量比和摩擦系数对初始运动状态的影响。结果表明,在水平加速度作用下,木构架有4种初始运动状态:静止,滑移,摇摆和滑移摇摆;初始运动状态的影响因素有:水平加速度、径高比、质量比和摩擦系数;随着加速度的增加超过了临界加速度,中国传统木结构将进入摇摆状态;径高比是木构架进入摇摆或滑移摇摆状态的关键参数;质量比的增加能够抑制滑移摇摆状态的出现。

In order to study the dynamic response of traditional timber structures,the timber frame was simplified into a planar frame model,the four initial motion states under horizontal earthquakes were analyzed and the effects of aspect ratio,mass ratio and friction coefficient on initial motion state were investigated.The results show that under horizontal earthquakes,the timber frame has four initial motion states:rest,slip,rock and slip-rock;The influencing factors of the initial motion state are:aspect ratio,mass ratio,horizontal acceleration and friction coefficient;The aspect ratio is a key parameter for the timber frame to enter a rock or slip-rock state;The increase in the mass ratio can suppress the occurrence of slip-rock.