土木工程外文翻譯---地震帶民用建筑由磚混向框架發(fā)展的必要趨勢-建筑結(jié)構(gòu)-文庫吧
2025-04-17 14:09 本頁面
【正文】 s Chinese schools collapsed heart. According to experts in emergency assessment of back stress, all brick structure for the casting slab and add columns and by formal design and the quality of the good did not collapse, much less steel frame structure and a. Seismic structure is the last line of defense, this view of the structure of choice for building seismic performance of unusual. 2. Earthquake with the choice of structure Earthquake collapsed houses, brick and concrete structure accounts for most of the first analysis of the masonry structure. Brickconcrete structure is a hybrid structure, with brick walls to load, due to the construction, low construction costs because, for decades has been the traditional form of Chinese civil, more suitable for deep bay into a small housing area is small, multi or lowrise buildings. Good pression performance is one big advantage, but also highlight its shortings: Since the major, low intensity, so that masonry structures subject to earthquake forces is relatively increased。 stoves, heavy, and basic use of artificial masonry, large amount of labor, inefficiency。 clay amount of large, often occupying farmland, affecting agricultural production。 as mortar and brick, block the cohesive force between the poor unreinforced tensile, bending and shear strength is low, seismic and crack resistance of poor construction quality and difficult to control, it is easy to structural damage, a rigid structure, this earthquakeprone areas should be used with caution such structures. The brick structure has the following damage of housing characteristics: (1) wall damage, the level of earthquake to masonry shear walls in bending. When the direction and level of seismic crosssection parallel to the wall for high aspect ratio close to 1, wall to shear deformation of the main。 and vertical shear stress in the joint action, the principal tensile stress beyond the masonry wall strength, wall inclined cracks appeared。 repeated the role of the earthquake, the two cross into direction of Xshaped diagonal crack。 parison of height to width when the wall for hours, then in the middle of a horizontal wall cracks. (2) vertical and horizontal wall joints damaged. Vertical and horizontal wall joints are a weak link in masonry, earthquake interaction between vertical and horizontal walls, cracks in the transition out of, resulting in vertical wall outward tilt or collapse. (3) to highlight a subsidiary of the roof structural damage. Prominent roof between the roof, parapets and other ancillary structures, due to earthquakes, whipside effect effect, the horizontal displacement is large, and the structure of the lack of a reliable connection, often collapsed damage. Damage statistics show that in the strong earthquake, the multistorey masonry wall is mainly connected with the destruction of ponents, and housingstorey big, thick layers, a relatively more serious damage. The structure of housing limited to masonry materials due to their characteristics (poor ductility), coup
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