Design Analysis Of Large Multi-tower Chassis Structure And Seismic Research

With the reform and opening up brought about rapid economic development,national prosperity gradually, gradually improving people’s living standards,growing urban area, urban construction accelerated, leading to urban land tensions.For today’s high cost of land, the engineering staff before us is how rational use oflimited urban construction land, after nearly ten years of development, a largemulti-tower chassis structure has become a solution to this problem. At the bottom ofa large space can be used for commercial plaza, such as supermarkets, commercialcity, etc., the upper tower structure for office, residential, hotel, etc., that is areasonable use of the land for construction, but also meets the best interests of theowners of the building, the large chassis multi-tower structure is widely used in thecountry.With the continuous development of the construction industry, high-risebuildings in a city that has become an integral part of, and a large multi-towerchassis structure also belong to high-rise buildings. At present, for large multi-towerchassis structure, because the structure to a large amount of inter-tower chassis withmutations from the appearance, designers often only been completed for the "product" as the object of study, a one-time load in the load structure on, ignoring itsaccumulated during the construction of internal forces and deformation characteristicsof accumulation and redistribution, leaving the safety factor is not conducive for thesubsequent construction, so the construction of such structures load simulationanalysis is necessary.Because of the characteristics of a large space at the bottom of a largemulti-tower chassis structure of the upper tower structure under external loads role inthe mechanical characteristics of the structure of the complex, due to its chassis andtower joints stiffness mutation is likely to produce stress concentration and structuredue to the tower independence, its integrity is poor, you need to set connector,connector location Heights, volume, etc. will affect the structural integrity, therebyaffecting the seismic structure, but the structure by the action of seismic load, thevibration type of complex and diverse, even a serious torsional.Firstly, through the construction process of a large multi-tower chassis structureanalysis method for the analysis of load simulation to analyze the construction processstress state, avoid the " finished " Load loads caused by ignoring the significantaccumulation of internal forces and deformation accumulation and redistribution rule.Second, this paper symmetrical structure with three towers and large chassis based onthe finite element analysis software for modeling, and then compare the differentresults under different parameters summarized seismic performance of a largemulti-tower chassis structure law, which from design analysis and seismic analysisboth provide reasonable suggestions for practical engineering design.