Research On Mechanical Properties Of Structures With Concrete Special-Shaped Columns And Transfer Stories

As the "technical regulations on concrete Special-shaped column structures "of National Standard is put into practice, special-shaped column structural systems are getting more and more attention with its unique advantages. Among them, those special-shaped columns structures with reduced columns at the bottom and transfer story are comparatively special ones, and currently there is still few studies on them. This thesis, regarding them as studying objects, makes analysis to various important Mechanical Properties. Main contents and conclusions of the study are as follows:1.Under the use of finite element software ANSYS, analysis are made on the Mechanical Properties of nodes when the transfer from upper Special-shaped column to downside rectangle Columns happens. The modes of nodes formed during the transfer from Crossed, L type and T type Special-shaped columns to rectangle Columns are established. The pressure that upper Special-shaped columns send to frame beams is calculated. The reasonable size range in which Crossed, L type and T type Special-shaped columns may exceed the downside rectangle Columns as well as the impact on Mechanical Properties of switch nodes by frame beams axillas.2.Using the finite element software SAP2000 as well as the method of "push-over", Stiffness ratio of beam to column and the place and order of beams' and coloumns'plastic hinge as well as the influence of lateral displacement are analyzed. The influence on structural damaging mechanism by Stiffness ratio of beam to column is discussed and the reasonable rage of numerical values of Stiffness ratio of beam is put forward.3.Using the GuangSha software and real examples, the numerical values of sections and the requirements for structural design concerning Special-Shaped Columns Structures with Reduced Columns at the Bottom and Transfer story in the current regulations on Special-shaped column structures are discussed. Disposal programs different from the Regulations are put forward.The studying results have important meanings in theoretical guidance and practical use of concrete Special-shaped column structures with Transfer story, and can be used as a reference for further redacting "technical regulations on concrete Special-shaped column structures".