关键词: 轻骨料混凝土, 钢纤维, 实例分析, 局部承压, 连续刚构

Abstract: The crafts of the design and construction of long span continuous frame bridge using lightweight aggregate concrete are different from those using common concrete, since the performance of lightweight aggregate concrete is different from that nf the common one. Taking the Shuitu Jialingjiang Bridge as an example,the differences of the performanee of local compression hetween lightweight aggregate conerete and that of common concrete are analyzed according to the standard of ＂Technical Specification for Lightweight Aggregate Concrete Bridges＂. The result shows that the performance of local compression of lightweight aggregate concrete is lower than that of common concrete, and when the parameters applied to the two kinds of concrete are the same, the results of local compression of lightweight aggregate concrete cannot fit the requirements of specification. It is tested by the ease study that the appropriate addition of steel fiber can improve the performance. of local compression of lightweight aggregate concrete and make it to satisfy the standards of the specification.

Key words: lightweight aggregate concrete , steel fiber , case analysis , partial pressure , continuous rigid frame ;