约束膨胀混凝土的力学性能分析

Analysis on the mechanical behavior of confined expansive concrete

通过特制的钢管试模，制成模拟钢管混凝土中核心混凝土工作状态的混凝土试块。针对约束状态下形成的不同高效减水剂掺量与不同混凝土膨胀剂掺量的混凝土进行其力学性能分析，从而探索提高构件力学性能的最佳途径。通过对应的钢管混凝土标准试件的力学性能测试，证明核心混凝土性能改变的规律。

In this paper, for simulating the concrete core of Concrete Filled Steel Tube, the mechanical behaviors of the concrete mixed with different amount of water - reducing agent and expansive agent in purpose -made steel tube were tested in order to search a better way to improve the behavior of the member. The test results of Concrete Filled Steel Tube indicate the effective method to improve the behavior of the concrete core.