大跨空间结构认知总结(国外英文资料).docVIP

大跨空间结构认知总结(国外英文资料) The surrounding area is full of cones, the stiffness is better, it has all the advantages of inclined to four corners, the roof is simple. Honeycomb type rack: three pyramid component unit upside down, the inverted three pyramid bottom horn in, because of its top chord is regular triangle and hexagon, its graphics is similar to the bee nest, reason for honeycomb shape three pyramid, lower chord rack is single hexagon. Lower chord with inclined web member in the same vertical plane, each node has six bar will hand over, the string is short, force a reasonable bottom chord length, and in all kinds of network frame its stem number and node number is less, light small and medium-sized across the roof, has the good economic effect. Star quadrature conical frame: the orthogonal formation of two inverted triangular trusses, which have a common vertical bar at the intersection, shaped like a star. Connecting the upper strings of the unit form the upper string of the lattice, connecting the vertices of each star to the lower string of the net. The upper string is in the same vertical plane as the upper string. The length of the string is reasonable. The force of the vertical bar is equal to the load of the upper chord and the stiffness is slightly less than that of the right square, and it is used for supporting the roof of the small and small span Of two orthogonal sideways to the rack: unit two direction of plane truss vertical cross each other and become, orthogonal square turn 45 °, each axis to the truss and architecture of orthogonal 45 °. Two directions of plane truss span has long have short, number of nodes have more and less, but the rack is high, so the truss stiffness of each different, can form good space force system. 网壳结构：按层数分为单层（肋环型球面由径肋和环杆组成，网格呈梯形，每个节点只会交四根杆件，节点构造简单，整体刚的差，适用中小跨度；肋环斜杆型球面由肋环型基础上加斜杆组成也成施威得勒型，大大提高了网壳的刚度，提高了抵抗非对称荷载的能力，又根据斜杆分为单斜杆，交叉斜杆，无环杆的交叉斜杆等，网格呈三角形，刚度好，适用大中跨度；三向网格型球面水平投影呈正三角形，通过圆心作夹角±60°的三个轴，将轴等分n份并连线，形成正三角形网格，受力性能好，外形美观，适用于