隨著多起恐怖攻擊事件、意外爆炸事件及戰爭的發生，可得知結構物受爆炸外力作用會對結構外部環境及內部結構造成災難性的破壞，進而危及到周遭或室內的人員及設備之安全性。當結構物受爆震波作用時，結構構件(Structural element)之破壞模式(Failure mechanism)將區分整體破壞(Global failure)及局部破壞(Local failure)。其中，整體破壞包括撓曲破壞(Flexural failure)、斜剪破壞(Diagonal shear failure)及直剪破壞(Direct shear failure)；而局部破壞包括成坑(Crater)、疤落(Spalling)及炸穿(Breach)三種現象。局部破壞現象中，視衝擊波之強度大小，通常在結構構件之迎爆面會產生成坑現象，在背爆面會產生疤落現象，當承受一定程度之爆震波時，則會進一步發展成炸穿現象。本研究主要以有限元素模擬為分析工具，針對鋼筋混凝土構件受爆炸外力作用下產生之局部破壞模式進行探討，並模擬一般鋼筋混凝土結構物經材料性能提升或施以補強手段後之構件破壞模式及損傷程度。考量一般建築物外牆常用之厚度為15cm，爆炸數值模擬環境之試體模型尺寸設置為50cm×50cm×15cm之鋼筋混凝土版，炸藥種類分別選用TNT及C4炸藥，炸藥量區分為100公克及150公克，並以接觸爆炸(Contact explosion)進行數值模擬。數值模型分別於材料性能提升方面，採用碳纖維混凝土、克維拉纖維混凝土及無機聚合混凝土；於補強手段方面，則分別以噴塗全聚脲彈性塗料(Polyurea coating)及在試體版側面增設動量阱(Momentum trap)之方式作為主要研究對象。研究中採用*MAT_159作為混凝土材料模型，爆壓傳播之狀態描述方程式及各材料之參數設定，以進行基本力學實驗所得數據為主，文獻建議參考值為輔。此外，考量爆炸應力波之加載率極高，本文亦針對材料之應變率敏感度及元素侵蝕條件完成相關參數研究。由於爆炸實驗複雜度較高且同時需考量安全性問題，本研究數值模擬結果以11組爆炸實驗結果進行驗證，結果顯示本研究方法可合理地預測鋼筋混凝土版構件於爆炸衝擊荷載作用下，造成之破壞類型及損傷程度。研究成果可作為建築物爆炸損傷評估工具，亦可提供不同補強手段抗炸性能提升程度之參考。

Explosions near buildings can cause catastrophic damages on the building external and internal frames, and the most important thing is that can cause injuries and loss of life to the occupants of these buildings.
In the global failure behavior, flexural failure makes the structure have Scabbing phenomenon and some of Fragment are spattered. In the local failure behavior, the local failure phenomenon includes Crater, Spalling and Breach. The location of the Crater is in the front of the specimen. It is because the difference of air and specimen medium, the stress wave reflect and refract in the edge of the specimen and the tensile stress makes the edge appear Spalling phenomenon, especially the rear surface. When the crater and spalling depth exceed the specimen depth, Breach phenomenon appear in the middle of the specimen.
This numerical investigation on performance of fiber reinforced concrete slabs subjected to contact explosions focus on the local failure behavior. For fitting the normal depth of most of building walls, the dimension of the concrete is 50cm×50cm×15cm.
For promoting the explosion capability of the reinforce concrete structure, the investigation research the objects about Carbon Fiber Reinforce Concrete, Kevlar Fiber Reinforce Concrete, Geopolymer Concrete, Reinforcement with polyurea coating and fiber patch and Momentum trap setting beside the specimen.
This investigation applies LS-DYNA numerical software for the Finite Element Analysis, and compares the numerical result with the damage discussion of real explosion experiment.
As providing the cohort investigation for the prediction and evaluation subjected to impact and explosion, *MAT_159 for concrete material is used as the main material control equations, and *MAT_159 could consider the influence of high strain rate.

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