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1、Seismic zone to the framework of the civil from the brick necessary for the development trend【Abstract 】Earthquakes are inevitable natural disasters,but the choice of building structures which can effectively reduce the losses caused by the current seismic zone in construction, particularly in econo
2、mically underdeveloped areas of the building.Mostly brick building structure, but its poor ability to contribute to the seismic earthquakes power and prestige, while the frame structure in the earthquakes strength is especially evident, although the price higher, but with the masonry structure.Compa
3、red to more cost effective. As more seismic capacity frame - shear wall structure, its high price and low popularity is difficult to build large-scale.【Key words】masonry; framework; choice; cost China is located in the worlds two most active seismic zones in the middle on the east Pacific seismic be
4、lt, west and southwest is the Eurasian seismic zone after areas, is one of many earthquakes in the world, for we must strengthen the Earthquake Research and prevention. Damage caused by the earthquake in theory, three main factors: the level of the ground motion acceleration, resonance, and energy o
5、f inclusiveness. In fact, the earthquake itself is difficult to pose a threat to the safety of human life, most casualties are affected by the earthquake which caused the collapse or destruction of buildings, usually accounting for 95% casualties in the earthquake. Only less than 5% of casualties di
6、rectly caused by the earthquake and the earthquake floods, landslides cause secondary disasters such as, but not seismic retrofit measures for concrete structure (walls plus not Rachels precast concrete floor) caused disaster is particularly tragic. 1. Housing a number of reasons for the collapse Ho
7、uses collapsed in the earthquake, so many casualties so heavy, what the problem is where? One view is that: Since the earthquake strength, housing guard, the design did not strictly enforce the standards, plus there are some jerry-building phenomenon. For this reason man is undeniable, it is the adm
8、inistrative mechanism and the building construction behavior of the loophole is people own issues. Another view, less developed Wenchuan area, building houses and more traditional brick-based, and fell into disrepair, has been unable to cope with more than magnitude 7 earthquake, in fact, a large nu
9、mber of brick and concrete structure building collapsed, causing heavy casualties phenomenon, already on the 1976 Tangshan earthquake occurred. This view from the building itself be analyzed structure, we need to deal with earthquake science, the structural seismic performance seriously strengthen a
10、nd maintain the building is not down, come to minimize casualties, at least not as it is now present in people before such terror. Overseas Chinese Affairs department in Sichuan Province is located in the hardest hit of 69 overseas Heart School, the survey found. 41 damaged schools, including severe
11、ly damaged 18 of 23 slightly damaged, none of the overseas 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 s
12、tructure 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
13、 structure. Brick-concrete 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 low-rise buildings. Good
14、 compression performance is one big advantage, but also highlight its shortcomings: 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
15、 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 da
16、mage, a rigid structure, this earthquake-prone 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 cross-section 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 m
