不规则大跨悬挑结构优化设计与力学特性数值模拟分析  

Analysis of Optimal Design and Mechanical Properties by Numerical Simulation Method on Longspan Irregular Cantilevered Structure

作　　者：张宁 钮鹏[3] 蒋航海 ZHANG Ning;NIU Peng;JIANG Hanghai(Anhui Urban Construction Design Insistute Corp,Hefei 230051,China;Anhui Jianzhu University,Hefei 230601,China;Institute of Architectural Engineering,Shenyang University,Shenyang 110044,China;Anhui Tendering Group,Hefei 230051,China)

机构地区：[1]安徽省城建设计研究总院,安徽合肥230051 [2]安徽建筑大学,安徽合肥230601 [3]沈阳大学建筑工程学院,辽宁沈阳110044 [4]安徽省招标集团,安徽合肥230051

出　　处：《粉煤灰综合利用》2023年第3期10-15,36,共7页Fly Ash Comprehensive Utilization

摘　　要：辽宁省档案馆新馆为省级重点建设工程,建筑平面布置较为复杂。根据该工程平面不规则及大悬挑的特点,运用Midas/Gen等有限元分析软件进行数值模拟分析。在分析过程中,用静力等效风荷载来代替规范给出的基本风压,从静力风荷载和地震荷载两种角度来进行结构的抗震性能分析。根据计算结果,获得在不同工况和方案条件下悬挑结构同楼板、桁架杆件和关键节点之间受力、变形的联系。针对部分节点变形过大的问题,采取增设斜撑等方式,减小构件内力,控制竖向变形,为类似不规则大悬挑结构的抗震设计提供优化方案和完善措施。The new Liaoning Provincial Archives is a provincial key construction project,and the building layout is relatively complex.According to the characteristics of irregular plane and large cantilever of the project,the finite element analysis software such as Midas/Gen is used for numerical simulation analysis.In the analysis process,the static equivalent wind load is used to replace the basic wind pressure given by the code,and the seismic performance of the structure is analyzed from the two aspects of static wind load and seismic load.According to the calculation results,the stress and deformation relations between the cantilever structure and the floor,truss members and key nodes under different working conditions and schemes are obtained.To solve the problem of excessive deformation of some joints,diagonal bracing is added to reduce the internal force of members and control the vertical deformation,so as to provide optimization schemes and improvement measures for the seismic design of similar irregular large cantilever structures.

关 键 词：不规则建筑 悬挑结构 数值模拟分析 抗震性能 

分 类 号：TU375.4[建筑科学—结构工程]