An Experimental Study on Steel Sguare Pipe Column Bases Solidified with Encasement

提出了钢筋混凝土短段包钢管固化钢柱基础的结构新方法。提出了。该方法具有良好的施工可操作性。为了了解受水影响的柱基础的力学特性，对13个试件进行了水平交变荷载试验。试验涉及的主要参数是钢筋混凝土桩的高度和覆盖深度、混凝土的抗压强度和钢筋的布置。测试结果的一些观察结果如下。1. 高强混凝土柱基础虽然钢筋混凝土桩短，但具有良好的力学性能。2. 许多试件的屈服强度是由钢筋屈服决定的。但有些低桩固化的试件由低强度混凝土组成，是由钢筋锚固失效决定的。3. 钢管有助于从钢柱到RC短段的应力传递。

A new structutal method of steel column bases, which solidified with RC stub covered with steel tubing. was proposed. This methos has good construction workability. In order to clayfy the mechanical characteristics of the prooised column bases, 13 specimens were tested under alternating horizontal load. The main parameters involved in the tests were hight and covering depth of RC stub, comressive strenght of concret and arrangement of reinforcing main bar. Some observations from the test results are as follors. 1. The column bases with high strength concret were good mechanical characteristics in spite of small RC stub. 2. The yielding strength of many specimens were decided by yielding of reinforcing bar. But some specimens, which solidified with low stub consist of low strength conoret, were decided by failer of anchorage of reinforcing bar. 3. The steel tubing contributes to stress transfer from steel column to RC stub.