Un câble est chargé à l'aide d'une charge uniforme. This causes the deformed shape in the form of the circular segment. Determine the equilibrium force of the cable to obtain the given sag of the cable. The add-on module RF-FORM-FINDING is used for this purpose. Elastic deformations are neglected both in RF-FORM-FINDING and in the analytical solution; self-weight is also neglected in this example.
Une barre en forme de W selon la norme ASTM A992 est sélectionnée pour supporter une charge permanente de 30 000 kips et une charge d'exploitation de 90 000 kips en traction. Verify the member strength using both LRFD and ASD.
Considérons la travée de barre ASTM A992 W 18×50 ainsi que les poids propre et les charges d'exploitation représentés sur la Figure 1. The member is limited to a maximum nominal depth of 18 inches. The live load deflection is limited to L/360. The beam is simply supported and continuously braced. Verify the available flexural strength of the selected beam, based on LRFD and ASD.
Une poutre avec des efforts tranchants de 48 000 et 145 000 kips des charges permanentes et d'exploitation, respectivement, est illustrée dans la Figure 1. Verify the available shear strength of the selected beam, based on LRFD and ASD.
Un câble très rigide est suspendu entre deux appuis. Determine the equilibrium shape of the cable (the catenary), consider the gravitational acceleration, and neglect the stiffness of the cable. Verify the position of the cable at the given test points.
Déterminez la flèche maximale d'un bloc 3D encastré à ses deux extrémités. The block is divided in the middle: the upper half is made of an elastic material and the lower part is made of timber - an elasto-plastic othotropic material with the yield surface described according to the Tsai-Wu plasticity theory. The block's middle plane is subjected to vertical pressure.
Un porte-à-faux est entièrement encastré à l'extrémité gauche et chargé par une force transversale et un effort normal à l'extrémité droite. The tensile strength is zero and the behavior in the compression remains elastic.