建筑土木工程外文翻译外文文献英文文献地震带民用建筑由砖混向框架发展的必要趋势

建筑土木工程外文翻译外文文献英文文献地震带民用建筑由砖混向框架发展的必要趋势内容摘要：

l integrity is relatively poor, under the earthquake prone to cracking, damage or even collapse phenomenon. Previous earthquakes has proven this earthquake is a costly show! The frame structure, it is by the beams and columns, of three ponents based on the mon loadbearing, frame by the beam and floor structure connected together into a whole, only for filling wall partitions, not force, so the room layout flexibility and size of windows and doors shape a more free, more than 7 degrees for the large seismic structure and spatial structure. Lateral stiffness of the frame structure, the structure is flexible, lateral displacement and horizontal loads, the shear deformation curve. Through rational design, the frame structure to withstand large deformation, and can effectively absorb the seismic energy consumption, but excessive levels can cause the deformation of nonstructural ponents damaged, it should be controlled deformation in a certain range. In the earthquake, seismic deformation of the structure through the accumulation of energy (deformation energy) increases, deformation and stress is directly proportional, if the limit strength, structure will be destroyed, for the brittle masonry structure, not easily deformed to absorb the energy, intensity is small, the most easy to destroy, in turn, frames the natural cycle of seconds, but also elastic shaping, and can build up some energy, so easy to destroy. One typical example is the cover of the last century the mill in Tangshan 76 years ago, as a framework for applying the design drawings in Urumqi, 8 degree earthquake, earthquake of 11 degrees are not damaged. Another good structure is frame structure, it is the frame structure and wall bination of the two systems, drawing on their strengths, shear deformation is curved, with good lateral load resistance, with more boxes in terms of seismic shear structure, stability, housing and so on toughness than on concrete structure and frame structure, in the earthquake, housing frames and shear walls to bee two lines of defense system to increase the structural stiffness and strength is a flexible structure. 3. Framework for seismic design issues needing attention First, the earthquake seismic zone frame cast frame structure to give priority, followed by the assembly of the whole frame structural system, rarely used fabricated, either precast frame or frame should be as far as possible strong column and weak beam strong shear weak bending, extreme pressure weak pull, strong weak nodes building blocks of seismic design criteria, so that frame is a reasonable mechanism for earthquake damage lateral beam hinge mechanism to regulate the objectives of the framework for crack fortification requirements. When you press a seismic design, concrete strength should not be cast frame than c30。 by two to four design no less than c20. Second, the seismic frame column section size should meet the standard requirements of the axial pression ratio, which is affecting the form of columns and deformation dama。