Experimental Study on Earthquake Response Characteristics of High-Rise Reinforced Concrete Building

研究地震作用下三维地面运动叠加对建筑结构反应特性的影响是一个重要的问题。在本研究中，利用柱状试件进行了子结构在线试验，以研究双向激励，即水平激励和竖向激励对结构响应特性的影响。根据在线试验的极限强度概念，设计了一个12层的模型建筑，试验的试件为一层的柱子。利用纤维模型概念编制了弹塑性动力响应分析程序，对建筑结构构件的特性进行了评估。在子结构在线试验中，除第一层柱试件外，其余构件均采用该程序进行试验。采用致动器系统对柱状试件进行加载控制。使用该系统可以控制柱端的剪切变形、轴向变形和旋转变形。EWS计算机系统用于响应分析，个人计算机用于控制执行器和测量设备。这些试验的参数是垂直激励电平。试验结果表明，竖向激励水平对建筑结构反应特性的影响不大，但竖向激励试验中柱的拐点发生了位移，且柱的损伤程度与位移有关。研究三维激励叠加对建筑结构响应特性的影响是十分必要的。

It is an important issue to investigate effects of superposition of three dimensional ground motion to response characteristics of building structures during an earthquake. In this research program, Substructure On-line Tests were carried out using column specimens to investigate the effects of bi-directional excitation, i.e.horizotal and vertical excitation, to the response characteristics. A twelve-storied model building was designed based on the ultimate strength concept for the On-line Tests and the specimen for these tests was a column at the first story. Elasto-plastic dynamic response analysis program was developed using fiber model concept to estimate characteristics of members of the building structure. In the Substructure On-line Tests, the program was used for the members except the column specimen at the first story. And actuator system was used to control loading to the column specimen. It is possible to control shear and axial deformation and rotational deformation at the ends of the column using this system. An EWS computer system was used for response analyzes and a personal computer was used for control of actuators and measuring equipment. The parameter of these tests is the vertical excitation level. Results of this test series are as follows ;The effect of vertical excitation level to response charcteristics of the building structure is not so serious, but the inflection point of the column shifted in the test with veritcal excitation and the damage level of the column was dependent upon the shift. It is necessary to investigate the effects of superposition of tri-dimensional excitation to response characteristics of building structures.