精品中文字幕久久久久四十五十骆,成年人在线观看免费,999国产精品亚洲77777,亚洲天堂成人在线,av在线专区,精品96久久久久久中文字幕无,国产精品自拍亚洲

Lattice columns are used as compression-bending steel structure components, and are mostly used for plant frame columns and independent columns. The cross-sections are generally section steel or steel plates designed with biaxial symmetry or uniaxial symmetry. The components of the lattice system are composed of limbs and binding materials. The limbs mainly bear axial force, and the binding material mainly resists lateral force (relative to the axial direction of the limb). Lattice column binding materials mainly include strips and panels. The structural feature of the lattice column is that the material area is arranged far away from the axis of inertia, which can ensure the bending resistance of the reinforced member under the same axial resistance condition and save material.