优化并翻译一下这句话使之具有学术规范性：同时由试件的钢连梁首先屈服逐渐转变为钢连梁与组合墙肢同步屈服。

Simultaneously, the steel connecting beam of the specimen yielded first and gradually transformed into the synchronous yielding of the steel connecting beam and the composite wall limb. (Note: The original sentence is grammatically correct, but lacks academic precision in terms of terminology and clarity.)