Laboratory experiments were conducted to define the response to earthquake loading of the exposed column-base connections common in low-rise steel frame structures. Six full-scale column-base connections with four internal anchor bolts were prepared and tested to failure under major- and minor-axis cyclic loading. The parameters varied were the size and thickness of the base plate and the diameter of the anchor bolts. The data were used to calibrate a finite element simulation, and that was used to predict the influence of other design parameters on the initial rotational stiffness of a connection. Linear regression was used to model the response surface of the initial rotational stiffness and the bending capacity of the connections under minor-axis loading. A three-parameter power function model was derived which acceptably predicted the experimental results.

进行了实验室实验，以确定低层钢框架结构中常见的外露柱基连接对地震荷载的响应。准备了六个带有四个内部锚固螺栓的全尺寸柱底连接，并在长轴和短轴循环载荷下进行了失效测试。不同的参数是底板的尺寸和厚度以及地脚螺栓的直径。这些数据用于校准有限元模拟，并用于预测其他设计参数对连接初始旋转刚度的影响。线性回归用于模拟初始旋转刚度的响应面和短轴载荷下连接的弯曲能力。