钢框架结构优秀毕业设计计算书.doc

PAGE / NUMPAGES 常熟市海天科技综合楼 摘 要 本设计是对常熟海天综合科技楼的设计。 该科研楼的结构主体为四层结构,局部为五层。结构主体为钢框架结构,采用钢与混凝土组合楼盖,基础为独立扩展基础。结构设计考虑到了结构的抗震性能,在有关地震效应计算时,主要参考国家现行规范。结构的计算的主要内容依次如下：PKPM软件计算初步选取构件尺寸,荷载的计算,内力的计算,构件的验算,构件的连接设计,柱下扩展基础的设计。其中内力考虑了风荷载、地震荷载、雪荷载等多种荷载,构件和节点的验算均考虑了有震及无震两种情况。 根据不同力的作用方式选择计算方法,其中计算：框架刚度采用 D值法;水平地震作用计算采用底部剪力法,竖向荷载作用下采用分层法,风荷载作用下的内力计算采用反弯点法。 计算中采用了一些合理的假定,如不考虑屋面结构找坡,当作平屋定计算,从而使计算结构对称,可取一半结构,大大简化计算,且误差仅在1.5%左右。计算中注意对手算结果和电算结果的比较,可以对软件计算和手算各自的特点有更充分的认识。在计算组合梁挠度时,按简支梁简化计算。计算组合板负弯矩时,按单跨两端固支简化计算。 在具体的结构计算中以国家现行规范为依据。 关键词： 钢框架结构 节点设计 钢构件设计 Abstract The design Object is Changshu Haitian Integrated Science and TechnologyBuilding This building is four-strory, partially five. The main form of it’s structure is steel frame structure,while the floor is steel and concrete posite floor. The building use single extended foundation.the structural design bases on graduation project requests,such as the capacity of resisting the earthquake.in the calculation,the solutions about earthquake puting is according to the aseismic code,which is our national noruns.specificly speaking,the process of the structural design are as follows,judge the size of the member of structure,calculate the load,calculate the internal force,design the conection of members,design the single extended foundation under the column.When calculate the internal force,many loads are taken into consideration,such as the wind load,the seismic load,the snow load and etc;when check the steel member and the connections,the normal situation and seismicsituation are both considered. According to different modes of selection method, which calculated : frame rigidity D; Seismic levels calculated using bottom shear, under vertical load stratified, Wind Load Calculation of internal forces of anti-bending point method. In the calculation, I adopt somereasonable assumptions.For instance,ignore the slope madefor draining the water,treat the roof as flat roof so that the structure is symmetrical.And when the structure is symmetrical,w