На канат действует равномерная нагрузка. 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.
Стержень W-образного сечения ASTM A992 выбирается таким образом, чтобы выдерживать собственный вес 30 000 тысяч фунтов и временную нагрузку 90 000 тысяч фунтов при растяжении. Verify the member strength using both LRFD and ASD.
Consider an ASTM A992 W 18×50 beam forspan and uniform dead and live loads as shown in Figure 1. Стержень ограничен максимальной номинальной высотой 18 дюймов (45,72 см). 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.
На рисунке 1 показана балка ASTM A992 W 24x62 со сдвигом на концах 48 000 и 145 000 kips от постоянной и временной нагрузки соответственно. Verify the available shear strength of the selected beam, based on LRFD and ASD.
Между двумя опорами подвешены очень жесткие канаты. 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.
Теперь можно определить максимальный прогиб трехмерного блока, защемленного на обоих концах. 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.
Консоль полностью защемлена на левом конце и загружена поперечной и осевой силой на правом конце. The tensile strength is zero and the behavior in the compression remains elastic.