综合管廊横向振动台试验设计

在基于文献调研及综合考虑试验目的、试验条件、试验经费的基础上对于综合管廊横向振动台试验进行详细设计。首先,对于试验中所需的振动台、模型箱、测试元件等试验设备进行设计与选择。其次,对于试验中两大主要方面:模型相似比和模型配筋进行研究。在相似比设计中依据Bockinghamπ定理以加速度、密度、弹性模量、长度这4个参数为基本量,考虑采用忽略重力模型,从而推导出其余相似比。模型配筋设计中由于无论单层综合管廊还是双层综合管廊原型结构配筋均较为简单同时考虑受力的合理性,本次配筋采用等面积配筋率原则。再次,基于地下结构地震反应特点选用El-Centro波、Kobe波、Taft波,试验加载采用分段逐次加载,并给出详细的加载制度。最后,基于前期二维模型的数值模拟,给出单层及双层综合管廊的测试元件布置图。

Design of a Transverse Shaking Table Test for Utility Tunnels

Based on an investigation of the literature and a comprehensive consideration of test purposes,test conditions,and test funds,a transverse shaking table test for utility tunnels was designed in detail.First,test facilities such as shaking table,model box,and testing element are introduced.Second,the two main aspects of the experiment,model similarity ratio and model reinforcement,were studied.In designing the similarity ratio,the four parameters of acceleration,density,elastic modulus,and length,were taken as basic quantities.Then,according to the Bockinghamπtheorem and the gravity neglected model,other similarity ratios were derived.Reinforcement of the prototype structure was simple,thus,the equal area reinforcement ratio principle was adopted in the design of the model for this test,accounting for the rationality of the force.Third,based on the seismic response of the underground structure,El Centro,Kobe,and Taft waves were selected,and a detailed loading system is given.Finally,based on the numerical simulation in a previous two-dimensional model,the layout of test elements for the utility tunnel is present.