Ac≥N/（Nfc ）=1926.29×103/（14.3×0.9）＝149672mm

对于中柱：N= nβFgE =7×1.25×4.2×5.1×14×＝2623.95kN

          Ac≥N/（Nfc ）=2623.95×103/（0.9×14.3）=203881mm2 

取柱子尺寸为： 

底层：b×h=500mm×550mm

以上层：b×h=450mm×500mm 

3.5楼板选择

板的厚度取l/40=4200/40=105mm，故本设计中所有楼板均采用现浇板，板厚均为100mm。

3.6结构横向框架的计算简图

本框架结构采用柱下独立基础，选粘土夹碎石层为地基持力层，基础顶面到室内地面1.50m。横向框架的计算简图见下图所示，取顶层柱的形心线作为轴线，2～7层柱的高度取为3.9m，底层柱的高度从基础顶面至楼板，h1=3.9+1.5=5.4m。

 横向框架计算简图

 4 竖向荷载作用下的内力计算 

4.1计算单元 

取③轴线处的横向框架为计算单元，计算单元的宽度为4.2m。直接传给该框架的楼面荷载如图中竖向阴影部分所示。由于纵向框架梁的中心线与柱子的中心线不重合，因此在框架节点上还作用有集中力矩。

 计算单元及荷载传递图

4.2恒荷载计算摘要本设计为银行办公楼的设计，建筑总长50.4米，总宽17.4米，建筑主体高度30.3米，，总建筑面积约为7062 左右。

该设计按照给定条件和相应建筑规范确定建筑选型，该建筑为标准内廊式，并进行结构设计，确定结构方案选择，计算恒载、活载及框架内力，同时根据内力组合设计梁柱的配筋。此外，还进行了楼梯、双向板和基础的选择和计算。结构必须能够承受所有荷载而不至于部分破坏和倒塌，计算的内力进行了相应的调幅，使得梁柱的各控制截面弯矩分布更加均衡，更加接近于实际，从而使得框架结构设计更安全和合理。

本框架为7度抗震设计，先利用弯矩二次分配法进行了竖向荷载的计算，包括恒荷载，活荷载，接着利用D值法计算横向荷载，主要计算了地震荷载和风荷载，然后根据内力组合值，进行配筋计算。利用相应绘图软件完成建筑图，结构图。

毕业论文关键词：框架结构；结构布置；建筑设计；结构计算；内力计算；配筋计算。

 Abstract The design for the design of bank office building, building a total length of 50.4 meters, 17.4 meters wide, 30.3 meters high, the main building, a total construction area of about 7062.

 Building type selection of the design is determined according to the given conditions and relevant building codes, the building as a standard within the gallery, and carried on the structure design, determine the structure scheme selection, calculation of dead load, live load and internal frame, and according to the internal force combination the reinforcement design of beam and column. In addition, also the selection and calculation of the stairs, two-way slab and foundation. The structure must be able to withstand all load and not part of damage and collapse, to calculate the internal forces of the corresponding amplitude modulation, the control section bending moment distribution of beam and column is more balanced, more close to the reality, which makes the structure design more safe and reasonable.

 The framework for the 7 degree seismic design, first for the calculation of vertical load using the moment two methods of distribution, including dead load, live load, then use the D method for calculating lateral load, seismic load and wind load are calculated, and then based on the combination of internal force, reinforcement calculation. Complete building plans using graphics software, structure diagram 临海银行办公楼设计+CAD图纸(4):http://www.751com.cn/gongcheng/lunwen_54807.html