高层钢筋混凝土斜交网格结构振动台试验研究

为对高层钢筋混凝土斜交网格结构的破坏机理及抗震性能进行深入研究，对一高层钢筋混凝土斜交网格建筑进行了1/25的模型模拟振动台试验，在试验中针对模型进入非线性后，相似关系中的弹性模量比并非定值的问题，采用了分级相似关系，使试验结果能更贴近原型反应。研究了模型结构的动力特性和在不同地震烈度作用下的加速度反应及关键位置的应变变化情况，探究造成结构破坏的原因，找出模型结构破坏的薄弱环节。根据斜交网格结构的受力特点，结合模型破坏形态，总结高层钢筋混凝土斜交网格建筑的优缺点，并为高层斜交网格建筑的平面形式设计及材料选择提出建议。

Shaking table test for a high-rise diagonal frame structure model

In order to study failure mechanism and aseismic performance of a high-rise diagonal frame structure,a shaking table test for a high-rise diagonal frame building model with 1/25 scale was conducted.Because Young modulus of the model material varied after it entered nonlinear stage,hierarchical similarity relation was used to make the result more accurate.The dynamic characteristics,acceleration response under different seismic intensities and strain variation in key locations of the model were studied.Meanwhile,the vulnerable segment and the failure reason of the model were analyzed.According to the mechanical characteristics and cracking pattern of the high-rise diagonal frame building model,the advantages and shortcomings of this kind of building were summarized.Some suggestions were presented for selection of material and engineering design of a high-rise diagonal frame building.