The Impact Of Earthquakes On The Seismic Code And Optimize The Design Of Building Structures

At14:28on May12,2008the town of Yingxiu in Wenchuan County, SichuanProvince of China (latitude:30.9865°N Longitude:103.364°E) Richter magnitude8.0,moment magnitude7.9. According to seismic sector analysis, which is due to the IndianOcean earthquake Eurasian plate subduction, so the rapid uplift of the Tibetan causeearthquakes. Plateau slowly eastward flow of material, in the highlands east of theLongmen Shan belt to the east along the extrusion, face rigid block under the SichuanBasin block, resulting in long-term accumulation of tectonic stress energy, so, inLongmen River North to the sudden release of Yingxiu area. Thrust, D, squeeze-typefault earthquake. Sichuan earthquake occurred in the brittle crust to ductile transitionzone, a depth of ten to twenty kilometers, for the shallow earthquakes, and longerduration, so a huge destructive impact is very strong.Including the epicenter of the county within fifty kilometers, and200km fromeach city. Gansu, Shaanxi, Ningxia, Tianjin, Qinghai, Shanxi, Beijing, Shandong, Hebei,Henan, Anhui, Hubei, Chongqing, Hunan, Guizhou, Yunnan, Inner Mongolia, Guangxi,Hainan, Guangdong, Tibet, Jiangsu, Shanghai, Fujian, Zhejiang, Liaoning and otherprovinces in the country (municipalities and autonomous regions) as well Hong KongSAR, Macao Special Administrative Region or Taiwan region has clearly felt. Inaddition to mainland China, Heilongjiang, Jilin, Xinjiang felt in varying degreesoutside. Which, especially in Shaanxi and Gansu provinces of Sichuan earthquake themost serious. Thailand, Bangkok, Hanoi, Vietnam, much to the Philippines, Japan andother regions there is a certain felt.Based on the Wenchuan earthquake, structural damage analysis to discuss thesituation, then the2008version and2010version of the seismic code, and otherconcrete structures commonly used in standard specification revision changes, in-depthstudy and research. Combined with relevant experience abroad, earthquakes or largeearthquakes on the buildings after the collapse of the anti-depth study of the design.(1) the new regulatory requirements on the ability of structural seismic strengthening ofstructures in the face over standard setting role of the intensity of the earthquake (Earthquake), the performance potential of providing adequate security, to increasemulti-channel seismic line of defense, not designed only to rely on theoretical minimumcalculation.(2) In accordance with the key specifications for structural design, on the one hand is tosubstantially increase the quality of the product precast hollow plate, the other is the useof ring beam-structural constraints of vertical masonry column system components,thereby enhancing the overall vertical component seismic capacity.(3) the design of the stairs must take into account the stairs of the ladder board withbracing of the stress state, so the overall stiffness of the structure has a significantimpact, we should create the appropriate seismic checking and reasonable mechanicalmodel to to participate in the overall calculation.(4) through research and practice has proved that after the earthquake-proof structures,not only has the ability to withstand local earthquakes, and even have to prevent theimpact, explosion and other accidental loads caused by the partial destruction of thestructure after the collapse occurred in consecutive potential ability.(5) calculation model can be optimized and close to the true state of shock, to bettereffect against collapse.The face of large earthquakes, by optimizing the design model has initially solvedthe earthquake collapsed part of the problem appears, for the seismic design of part ofthe problem, propose a new solution.