網(wǎng)架結(jié)構(gòu)在雪荷載作用下破壞分析及加固方法研究.pdf

1、沈陽建筑大學(xué)碩士學(xué)位論文網(wǎng)架結(jié)構(gòu)在雪荷載作用下破壞分析及加固方法研究姓名：南波申請學(xué)位級別：碩士專業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：張德海;劉明2010-01碩士研究生學(xué)位論文 Abstract III Abstract With the development of economy and the improvement of science and technology，long- span space truss

2、is being widely used in buildings．As a typical space truss structure，it has been widely used in recent years within our country，but as one of the complex steel structure of the roof，its mecha

3、nical properties and mechanism was often more complicated. Compared with the concrete structure，its capacity，especially is in the low reliability (when under snow overloaded ) even collapsed． While

4、 space truss structure belongs to equilibrium structure，its mechanical properties and spatial unity and stability analysis were difficult．Some research has been done，which has acquired some achieve

5、ments．But in recent years，along with the global worsening climate，the storm and heavy rain appears frequently，roof overloading is of high frequency．Steel truss structure or because of destruction

6、or reached the limit bearing capacity of non- uniform stress．Accidents come across frequently．Therefore，the main work is as follows． (1) Extensively collect the damaged and undamaged drawings， life

7、 ，design information and test report of the space truss structure in this snowstorm in Shenyang area． Classified according to the location of damage，so as to get the force of each component，in

8、 which to identify a representative Space truss structure as the calculation example． (2) Through two kinds of snow load specifications comparative analysis in China and the United States to ob

9、tain differences and the advantages and disadvantages between them, combined with this disaster situation on the value of snow load in Shenyang，re- survey it to determine the snow load statistic

10、al parameters proposed snow load values，in order to provide a basis for further calculation and analysis of data． (3) With the use of ANSYS[15- 17] and ABAQUS finite element software, select a

11、 few examples of model to study the structural changes in the displacement， Ansys ultimate strength of the bars and find out the first loss locations to study the mechanism of destruction．Ansys

12、 a large- scale Space truss structure plant in the overall snow load imposed and partially snow load imposed by the situation, all changes in the displacement． (4) Ansys the cause of damaged