直交集成板斷面性質之數值模擬分析

Numerical Modeling of the Section Properties of Cross Laminated Timber

直交集成板(Cross-Laminated Timber)，以下簡稱CLT，質量輕約為鋼筋混凝土重量之0.2倍，具有經濟及自然材料循環再生的特性。CLT板材使用在鋼結構高層建築樓板上因現場組裝便利、迅速，更因為自重輕，可以降低各樓層的重量因而減少設計地震力，使梁柱結構尺寸斷面變小，可提升樓層高度之淨高及增加平面使用之面積。世界各地因為地理環境的不同，各國皆有專屬的特有樹種，以日本為例，將CLT產品性能最佳及經濟化，發展出外層為扁柏內層為杉木之CLT產品。為提供結構設計者一種迅速、可靠的應力分析方式，本次研究以驗證之方式探討CLT案例試驗資料與數值模擬分析結果進行兩者斷面性質比較，藉此結果提出當CLT其集成元具不同斷面組合時，可以運用模擬方式求得彎曲彈性係數E，並在不同支承邊界條件、不同載重形式時，提供精準之斷面應力分析。

The light weight of the Laminated of Timber, CLT, is about 0.2 times the weight of the concrete. It is also economical and recyclable from natural materials. CLT panel used in high-raise steel buildings, in addition to the convenience and speed of on-site assembly, CLT flooring panel can reduce the weight of each floor due to its light weight, thereby reducing the design seismic force, making the size and cross-section of the beam-column structure smaller, and increasing the net height of the floor height and the usable area indoor. Nowadays, due to the different geographical environments around the world, each country has its own exclusive tree species. In addition, Japan has developed CLT products with the outer layer of cypress and the inner layer of fir for optimizing the performance and economy of CLT products. In order to provide structural designers with a rapid and reliable stress analysis method, this study discusses the CLT test data and numerical simulation results in a verification way to compare the cross-section properties of these two. The results suggest that when CLT has different integrated component sections, the bending elastic coefficient E can be obtained by simulation, and accurate section stress analysis can be provided under different support boundary conditions and different load forms.