砂浆板冲击破坏试验研究

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振动与冲击 ›› 2015, Vol. 34 ›› Issue (6) : 177-182.

论文

砂浆板冲击破坏试验研究

通过锤击、均匀冲击荷载试验，采用逐级递增循环冲击加载方式，研究冲击荷载下砂浆板的破坏特征及冲击力、冲击能与最大加速度响应间关系。试验表明，二种冲击作用均使砂浆板跨中区域出现贯穿裂缝，呈脆性劈裂破坏形态，均匀冲击作用下破坏位置与跨中有一定偏移；锤击力时程经历主冲击、次冲击、卸载三阶段，加速度响应随锤击力增加而增加，裂缝贯穿后冲击力、加速度响应大幅减小；均匀冲击下加速度有二组响应区，响应随冲击能增加而增加，当冲击能达一定程度时响应大幅减小；继续增加冲击能，响应又会增加，并较快发生劈裂破坏，响应大幅减小；支座螺栓松动能缓冲部分冲击作用。

作者信息 +

Breaking test and vibration response analysis of cement mortar plate by shock load

Hammering and uniform shock test of cement mortar plate were introduced. The opposite sides of the plate were elastic support. Through cyclic shock with amplitude increasing, the failure features, relationships between hammering force and acceleration response, and, relationships between impact energy and acceleration response were studied. The results show that there is a transverse crack nearby the midspan of the plate. The failure shape of it is brittle splitting failure. Relatively, the location of failure is skewed toward the midspan of it by uniform shock. Time history curves of force by hammering include three stages, i.e. major shock, secondary shock and unloading. Acceleration response increases with the increase of hammering force. However, hammering force and acceleration response decrease obviously after the plate appearing transverse crack. Then, there are two groups of acceleration response regions by uniform shock. Acceleration response increases with the increase of impact energy. Once impact energy reaching a certain degree, acceleration response decreases obviously. If impact energy keeping increase, acceleration response increases again. But, brittle splitting failure occurs rapidly, and acceleration response decreases obviously again. Furthermore, support bolt can absorb some of impact energy.

Author information +

文章历史 +

摘要

通过锤击、均匀冲击荷载试验，采用逐级递增循环冲击加载方式，研究冲击荷载下砂浆板的破坏特征及冲击力、冲击能与最大加速度响应间关系。试验表明，二种冲击作用均使砂浆板跨中区域出现贯穿裂缝，呈脆性劈裂破坏形态，均匀冲击作用下破坏位置与跨中有一定偏移；锤击力时程经历主冲击、次冲击、卸载三阶段，加速度响应随锤击力增加而增加，裂缝贯穿后冲击力、加速度响应大幅减小；均匀冲击下加速度有二组响应区，响应随冲击能增加而增加，当冲击能达一定程度时响应大幅减小；继续增加冲击能，响应又会增加，并较快发生劈裂破坏，响应大幅减小；支座螺栓松动能缓冲部分冲击作用。

Abstract

Hammering and uniform shock test of cement mortar plate were introduced. The opposite sides of the plate were elastic support. Through cyclic shock with amplitude increasing, the failure features, relationships between hammering force and acceleration response, and, relationships between impact energy and acceleration response were studied. The results show that there is a transverse crack nearby the midspan of the plate. The failure shape of it is brittle splitting failure. Relatively, the location of failure is skewed toward the midspan of it by uniform shock. Time history curves of force by hammering include three stages, i.e. major shock, secondary shock and unloading. Acceleration response increases with the increase of hammering force. However, hammering force and acceleration response decrease obviously after the plate appearing transverse crack. Then, there are two groups of acceleration response regions by uniform shock. Acceleration response increases with the increase of impact energy. Once impact energy reaching a certain degree, acceleration response decreases obviously. If impact energy keeping increase, acceleration response increases again. But, brittle splitting failure occurs rapidly, and acceleration response decreases obviously again. Furthermore, support bolt can absorb some of impact energy.

导出引用

顾培英1,2，邓昌1,2，章道生1，汤雷1,2，王建1,2. 砂浆板冲击破坏试验研究[J]. 振动与冲击, 2015, 34(6): 177-182

GU Pei-ying1,2，DENG Chang1,2，ZHANG Dao-sheng1,2，TANG Lei1,2，WANG Jian1,2. Breaking test and vibration response analysis of cement mortar plate by shock load[J]. Journal of Vibration and Shock, 2015, 34(6): 177-182

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