基于速度与加速度准则的泄水闸裂缝工作性态诊断

裂缝实测资料综合反映了现场复杂因素对水工混凝土结构宏观裂缝性态的影响，考虑时效分量是评价裂缝工作性态的重要依据，可基于速度与加速度准则对裂缝工作性态进行诊断。结合王甫洲水利工程泄水闸实际情况，选取水工混凝土结构裂缝典型位置安装裂缝计组，监测获得经历不利荷载工况下的裂缝实测资料，建立反映温度非线性效应的裂缝统计模型，分离获得时效分量，采用速度与加速度准则对时效分量进行诊断。裂缝实测资料的应用分析表明，考虑温度非线性效应的裂缝统计模型拟合效果较好，虽然王甫洲水利工程泄水闸检修门库裂缝部分测点时效分量表现不收敛，但均趋于闭合，由此诊断该泄水闸裂缝目前处于稳定状态。该方法能简便且可靠地反映裂缝的时变规律，可为水工混凝土结构的裂缝工作性态诊断提供参考。

Diagnosis of sluice crack working behavior based on velocity and acceleration criteria

The measured data of fracture comprehensively reflect the influence of complex factors on macroscopic crack behavior of hydraulic concrete structure. The aging component is an important basis for evaluating crack working behavior. In this research, the crack working behavior is diagnosed based on the velocity and acceleration criteria. Considing the actual situation, the typical crack location of hydraulic concrete structure is selected to install a crack meter group, and the measured data of cracks experiencing adverse load conditions are monitored and obtained. Then, the crack statistical model reflecting the nonlinear effect of temperature is established, and the aging component is separated and obtained. Finally, the velocity and acceleration criteria are used to diagnose the aging component. The application analysis of measured fracture data shows that the fitting effect of the crack statistical model considering the effect of nonlinear temperature is good. Although the aging components of some measuring points of the cracks in a gate storehouse of a flood diversion sluice at the Wangfuzhou Water Conservancy Project do not converge, they tend to close. Thus, it is diagnosed that the cracks of the sluice are currently in a stable state. This method can reflect the time-varying law of cracks simply and reliably, and provide a reference for the diagnosis of working behavior of cracks in hydraulic concrete structures.