The Comparison Of Seismic Design Code Of Buildings Between China And Europe

Earthquake damage for a national and the local people’s is difficult to use money tomeasure, China is a country with a very serious earthquake hazard, having a history ofearthquake and has brought great loss to the people of our country. China’s earthquake hascharacteristics of wide distribution, dispersion, the epicenter, there is not very effectivemethods for earthquake prediction in the world.By far，the most effective method is towork on earthquake disaster prevention, in order to reduce the loss. In order to reach thisgoal, the various countries also made a different study, took a different approach andmeasures.China’s seismic research has its historical origin and the development of late.For along time,we keep a low level of fortification of seismic code. And the specification’sdevelopment is a process of fusion and reference research.Along with the reform andopening up China more and more cooperate with the outside world, especially after China’saccession to the WTO.The difference of Chinese and foreign building seismic design codeand the actual effects of structural seismic design is concerned, studying these differencesand influence are necessary.The problem of discovery and excavation research conclusionhas very practical engineering significance. At the same time,through studying the Chinaand Europe seismic code, to improve and advance our seismic code, to ensure the safety ofpeople’s property and life, building a harmonious society, is important for engineering,structure theory and social significance.At the same time, through some comparative analysis of structure seismic code to theEC8in China, to provide some material for researchers in engineering seismic design.In this passage, I use the method of literature research and the study of examples, toclarify the terms and conditions and then compare the two different specifications, inseismic design of building structures, the seismic fortification level of specificationdevelopment evolution and fortification goal, the design method of site classificationcompared using the method of literature research, listed in the form of tables and charts, injudging sand silt liquefaction and seismic effect on the static calculation method of contraststudy mainly in the form of a numerical example compared, more image more convincing.This passage mainly studied the following aspects of content: (1) Seismic fortification levels and fortification objectives, seismic design method ofcalculation and the regularity of the structure. Through studying we found that the structureof the economic loss as a measure of standard of fortification requirements in European, isworthy of reference for seismic code in China. In "requirements of limit damage" level,EC8fortification level is higher than the GB50011-2010specification small earthquakefortification level. The aspect of design method of calculating, GB50011-2010under smallearthquakes level structure design, think as under small earthquakes in a fully elasticstructure, can be directly using the elastic response spectrum and linear method to calculatethe seismic effect. EC8specification is in the earthquake resistance level corresponding toour country in seismic structural design, intensity of earthquake effect, the structure of theinternal force analysis and section design are assumed structure in a plastic state, andcoordinated. GB50011-2010gives in and under the action of the rarely met earthquake,interlayer displacement Angle limitation respectively corresponding to the "not bad" and"fail". EC8given the return period of95--not bad displacement angle limitation ofstructure, calculation and considering the effective stiffness after cracking, and accordingto the structure types increase multiplied by the coefficient. In terms of structure regularity,China specification defined from the perspective of structural plane and vertical irregular,while European specification from structure regularity measure. European specificationgiven EC8are the standard of structural plane and vertical regularity, although thespecified Angle with the Chinese specification is different, but the provisions concernedaspects, there are still some similarities.(2) The central importance to site category of seismic code, the provisions of the sandsoil liquefaction (powder). Study found that Chinese seismic code field of the definition ofcategories, I divided into two classes, a total of I0, I1, II, III, IV, and the characteristicvalue of subgrade bearing capacity, the layer thickness, site soil shear wave velocity isrelated to the EN1998-1site type seven class, including two classes (S1, S2) is highlyplastic clay and liquefiable soil respectively, the sensitivity of the clay, and standardpenetration test on the number of hammer, the soil shear wave velocity, undrained shearstrength of soil, the Chinese seismic code more fine site classification. China-eu seismiccode to the basic principle of seismic liquefaction discrimination are based on thesimplified criterion of seed, but considering the overlying effective stress, the measured standard penetration number N, the different methods of seismic action effect intoconsideration.(3) Seismic design code response spectrum and seismic action calculation method.Studies have found that two specification design response spectrum are basically the same,only there are differences in specific parameters. For calculation method (base shearmethod), calculate the value of the larger Chinese specification, European norms is lesser,China0.85specification introduces a structure of multiple particle reduction factor, theEuropean standard reduction have been made. About the layers of the distribution of thehorizontal earthquake action, the Chinese standard is according to the load on the floorsand floor to the bottom of the distance of product distribution, while the European standardonly when the structure is the basic mode of press along the height of the estimate of thelinear increase of the horizontal displacement.(4) Based on comparing the bottom shear method of RC frame seismic action, forreinforced concrete frame model, selected China and European structural base shear.China’s regulatory framework base shear with increasing field more and more soft,European regulatory framework base shear with soft twists and turns up. Chinesespecification field only affects response spectrum characteristics of the cycle, does notaffect the platform period of peak, European standard USES the site amplification factor,so the site in addition to the shadow response spectrum inflection point cycle, also affectthe peak period of response spectrum platform. With the improvement of intensity, theChinese standard of reinforced concrete frame base shear increases faster than Europe’sspecification. Chinese medium frame, Europe DCM frame floor seismic force were similar,cheng nabla distribution both floor seismic force. As space more and more soft, Chinesestandard calculation of floor seismic force beyond Europe, with the improvement ofintensity, the Chinese standard floor seismic force increases faster than Europe’sspecification.