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网壳结构的计算方法包括有限元法、拟壳法和解析法.把凯威特球面网壳结构的杆件分为环杆与斜杆两类.在轴对称荷载作用下,竖向荷载需要由斜杆的竖向刚度承担,斜杆在水平方向的支撑刚度由环杆提供.因此在荷载势能作用下,网壳结构发挥的能量是环杆的应变能与斜杆竖向弹簧势能.根据构件的受力状态确定内力-变形方程,得到能量方程,建立总势能方程,求解极值问题,得到结构变形函数,从而确定构件内力.该方法可实现网壳结构的近似计算,也从另一个角度理解网壳的传力机理.
The calculation method of reticulated shell structure includes finite element method, quasi-shell method and analytic method.It divides the rod members of Kaweite spherical reticulated shell into two types: the ring rod and the inclined rod, under the axial symmetrical load, the vertical load needs The vertical stiffness of the slant bar is assumed and the support stiffness of the slant bar in the horizontal direction is provided by the ring bar so that the energy exerted by the reticulated shell structure is the strain energy of the loop bar and the vertical spring potential energy of the diagonal bar under the action of the load potential energy. The force of member is determined by the internal force-deformation equation, the energy equation is obtained, the total potential energy equation is established, the extreme value problem is solved and the structural deformation function is obtained, so as to determine the internal force of the member. The method can approximate the reticulated shell structure, Understand the mechanism of force transfer from reticulated shell.