本研究探討了鋼筋混凝土版受縮尺彈頭撞擊的數值分析，並結合了Hanchak實驗的相關成果。主要目的是使用 LS-DYNA 軟體模擬縮尺彈頭撞擊試驗機對鋼筋混凝土版的動態破壞行為。通過模擬建築物受到子彈威脅的情境，研究彈體速度變化對結構損壞模式的影響，並評估在高動態下使用 LS-DYNA 混凝土模型的有效性和準確性。
研究方法主要包括經驗公式法及數值分析法。其中，數值模擬分析在工程領域中扮演著重要角色。透過LS-DYNA軟體，模擬彈體撞擊鋼筋混凝土版的動態行為，通過數值模型預測和理論值比較，評估結構物抗貫穿能力，並提供混凝土材料在這方面的應用與參考。
為了驗證數值模擬的準確性，本文參考了Hanchak等人的實驗數據。Hanchak實驗是研究混凝土版在高速彈體撞擊下行為的重要實驗之一，提供了大量的實驗數據和現象觀察，對於數值模擬結果的驗證和校正具有重要意義。
結果顯示，彈體速度變化對鋼筋混凝土版的損壞模式有顯著影響。不同抗壓強度的混凝土在受到撞擊後，貫穿深度和殘餘速度有所不同。研究還發現，使用 LS-DYNA 模擬高動態撞擊試驗具有較高的準確性，能夠有效預測混凝土版的破壞行為。數值模擬結果與Hanchak實驗數據的對比分析表明，兩者在貫穿後殘餘速度方面具有良好的一致性。
本文的結論是，通過建立一個完整的數值模型和研究流程，可以有效評估和預測混凝土結構在極端環境下的性能。這對於未來混凝土建築物的設計和建造具有重要的參考價值，有助於開發出更具抗震、抗爆和抗衝擊性能的新型混凝土材料，提高建築物在極端環境下的安全性和可靠性。

This study investigates the numerical analysis of reinforced concrete slabs impacted by scaled projectiles, incorporating findings from the Hanchak experiment. The primary objective is to use LS-DYNA software to simulate the dynamic failure behavior of reinforced concrete slabs under projectile impact. By simulating scenarios where buildings face bullet threats, the study examines how variations in projectile velocity influence structural damage patterns and evaluates the effectiveness and accuracy of the LS-DYNA concrete model under high dynamic conditions.
Results indicate that changes in projectile velocity significantly affect damage patterns in reinforced concrete slabs. Different compressive strengths result in varying penetration depths and residual velocities. The study also finds that LS-DYNA simulations accurately predict the failure behavior of concrete slabs, with numerical results closely matching Hanchak's experimental data.
In conclusion, the study demonstrates that a comprehensive numerical model can effectively evaluate and predict the performance of concrete structures under extreme conditions. This is valuable for designing future concrete buildings, developing new materials with improved resistance to seismic, explosive, and impact forces, and enhancing building safety and reliability in extreme environments.

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