土木工程外文翻譯(外文)框架-文庫(kù)吧資料
2025-07-02 16:32本頁(yè)面
【正文】 ram bines a picture of an isolated physical clemen I with representations of all external forces. The isolated clement may be a whole structure or some part of it. For example. Figure shows an entire structurea beam andeolumn rigid bentand the external forces (represented by arrows). which include gravity. wind. and the reactive resistance of the supports (called the reactions). Note: Such a force system holds the structure in static equilibrium. Figure is a freebody diagram of a single beam from the bent. Operating on the beam are two forces: its own weight and the interaction between the beam ends and the columns 10 which the beam is all ached. These interactions are not visible in the Iree body diagram of the whole bent. so one purpose of the diagram for the beam is to illustrate these interactions. For example. note that the columns transmit to theendsofthe beams horizontal and verti cal forces as well as rotational bending actions. Figure shows an isolated portion ofthe beam length. illus trating the beam39。s load responsehow it handles internal forces and stresses and significant deformations. 5. Evaluate whether the structure can safely handle the re quired structural tasks. Investigation may take several forms. You can l Visualize graphically the structure39。s physical beingmaterials, form, scale. orientation. location. support conditions, and internal character and detail. 2. Determine the demands placed on the structurethat is. loads. 3. Determine the structure39。 INVESTIGATION OF STRUCTURAL BEHAVIORInvestigating how structures behave is an important part of struc tural design: it provides a basis for ensuring the adequacy and safety of a design, In this section I discuss structural investigation in general. As I do thro
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