优化并翻译一下这句话使之具有学术规范性；同时试件由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。
Initially, the specimen yielded at the steel beam-to-column connection, and gradually transitioned to simultaneous yielding of the steel beam and composite wall limbs.
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