Mechanical Characteristics Of Tall Oblique Crossing Lattice Structure And Analysis Of Its Plastic Hinge Location

In order to increase the height of the building to meet the needs of economic development, some of the new architecture is gradually being used for a variety of super high-rise buildings, has become a beautiful landscape. Tall oblique crossing lattice structural system is one of the representatives of these new structural systems. Although it has been used, but our study is not deep enough.By derivation of horizontal displacement formula for tall oblique crossing lattice structure under horizontal loads, reached the following conclusions:this kind of building has a very large lateral stiffness, lateral stiffness is related to cross-sectional area of the inclined column, inclined column length, the number of columns and the angle between the column and the horizontal. Lateral stiffness is proportional to cross-sectional area of the inclined column and the number of columns.And lateral stiffness is inversely proportional to column length and the angle between the column and the horizontal.Thus, the lateral stiffness of the structure can be controlled by these factors.Numerical simulation of this kind of structure under horizontal loads,mechanical characteristics of oblique columns and the outer cylinder ring beams are drawn. Comparing the simulation results to theoretical formulas, we found that theoretical and simulation values are consistent.By theoretical derivation of formula for tall oblique crossing lattice structure under vertical loads, and sub-structure were tested under vertical loads, draw the following conclusions:the bigger the angle between the horizontal and inclined column, can lead to the greater the vertical stiffness of the structure and the vertical displacement is smaller, the greater the vertical stiffness of the outer tube, the greater the vertical load can be supported. Also found that by comparing to straight beam, curved beams’ force transmission of is more smoothly and its overall performance is better.Finally, Pushover analysis tall oblique crossing lattice structure was done, the effects of different positions on the plastic hinge were researched. Plastic hinge in the tall oblique crossing lattice structure should uniformly set at inclined column of the outer tube and the core barrel beam, which can improve the ductility of the whole structure, reducing the inter-base shear and drift angle, so as to improve the overall structure seismic purposes.