优化并翻译一下这句话使之具有学术规范性；同时试件由钢连梁首先屈服逐渐转变为钢连梁与组合墙肢同步屈服。
The specimen exhibited a progressive yielding behavior wherein initial yielding occurred at the steel connections, followed by a gradual transition to simultaneous yielding of the steel connections and composite wall limbs.
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