TAILIEUCHUNG - Lifetime-Oriented Structural Design Concepts- P22

Lifetime-Oriented Structural Design Concepts- P22: At the beginning of 1996, the Cooperative Research Center SFB 398 financially supported by the German Science Foundation (DFG) was started at Ruhr-University Bochum (RUB). A scientists group representing the fields of structural engineering, structural mechanics, soil mechanics, material science, and numerical mathematics introduced a research program on “lifetimeoriented design concepts on the basis of damage and deterioration aspects”. | 588 4 Methodological Implementation Fig. . Hygro-mechanically loaded concrete shell structure Damage evolution at the support area. Plot of scalar damage variable d - Fig. . Hygro-mechanically loaded concrete shell structure Damage zone and accelerated transport process in the area of cracks t 2590 d Obviously the saturation decreases equally at the inner and outer surface during the drying process in phase I. Despite the little number of elements in thickness direction it can be seen that the p-finite element method captures the distribution of the saturation Si very accurately. Starting from the time point t 638 d the saturation decreases rapidly at the outer surface. This accelerated transport process is due to the already existing cracks in the support zone. The saturation at t 938 d shows a point in phase II the moisturizing phase of the outer surface. It can be seen that because of the high crack induced permeability the saturation increases nearly equally at one level in the area of cracks. The next paragraphs will deal with each of the phases I II III in detail. Application of Lifetime-Oriented Analysis and Design 589 inside outside . v - - Z 2 t 37d --- - t 187d------- X_ t 375d t 637d i it 737d i i 0 10 20 30 40 50 60 70 80 90100 inside outside I I I I I I I I I I I 1 Si i i ii 04 t 375d . t 562d 0 t 637d------ -I L t 675d 0 t 712d 0 10 20 30 40 50 60 70 80 90100 x mm x mm Fig. . Hygro-mechanically loaded concrete shell structure Distribution of saturation Si and damage variable d across the shell thickness in the middle of the footprint. Left distribution of saturation for different points in time right distribution of saturation in the drying phase I Figure right illustrates the distribution of the saturation Si and the scalar damage variable d for different points in time within phase I which is the drying phase for the inner and outer surface of the shell.

• Đồ họa - Thiết kế - Flash
• thiết kế flash
• thiết kế web
• giáo trình CSS
• thủ thuật cắt html
• photoshop căn bản
• đồ họa máy tính
• Thiết kế đa truyền thông với Adobe Flash CS6
• Adobe Flash CS6
• Chỉnh sửa ảnh Photoshop từ Flash
• Chèn đoạn phim Flash vào Dreamweaver
• Chỉnh sửa đoạn phim Flash từ Dreamweaver
• Nhập file AI từ Illustrator vào Flash
• Tích hợp nội dung Flash
• flash cs5
• thủ thuật flash cs5
• tài liệu flash cs5
• học flash cs5
• ebook flash cs5