1000MW空冷竖向混合结构平扭耦联地震反应分析  

STUDY ON LATERAL-TORSIONAL COUPLED SEISMIC RESPONSE ANALYSIS OF SUPPORT STRUCTURE SYSTEM OF AIR COOLED CONDENSER IN 1000 MW THERMAL POWER PLANT

作　　者：刘林[1,2] 白国良[3] 薛海君 曾金盛[4] 

机构地区：[1]江苏双良集团博士后工作站,江苏江阴214444 [2]西安建筑科技大学博士后流动站,西安710055 [3]西安建筑科技大学土木学院,西安710055 [4]中国建筑设计研究院,北京100044

出　　处：《工业建筑》2012年第4期131-135,共5页Industrial Construction

基　　金：国家自然科学基金资助项目(50978216);教育部高等学校博士学科点专项科研基金资助项目(20096120110003)

摘　　要：直接空冷支架结构是火电厂的重要组成部分,结构的安全性直接关系到电厂的正常运行。传统300,600MW机组空冷支架结构采用典型的钢桁架-钢筋混凝土管柱竖向混合布置形式,结构刚度、质量沿竖向分布极不均匀。1000 MW空冷机组与300,600 MW空冷机组相比,从工艺布置到设备支撑结构都发生了质的变化,震后结构破坏造成危害更大。针对1000 MW机组空冷支架结构扭转效应明显的特点,考虑地震动扭转分量的平扭耦联地震动反应分析,研究多维地震作用下结构的动力响应。研究结果表明,平扭耦联地震作用对该类竖向混合结构的不利影响应予重视。Support structure system of air cooled condenser is an important component in a thermal power plant,the security of the structure directly related to the normal operation of the power plant.Spatial steel truss-reinforced concrete pipe column vertical hybrid structure,whose stiffness and mass is badly non-uniform at vertical direction,is used in the traditional 300 MW and 600 MW unit thermal power plants.Compared with the 300 MW and 600MW unit power plants,processing set-up and support structure have changed in 1 000 MW unit power plant,the risk that caused by deterioration of the structure is fearful.Because of the torsional effect and the coupling effect between the modes are obvious in this kind of structure,multidimensional earthquake response analysis,in which torsional components of ground motion is considered,is put forward in this paper to study the force transmission mechanism.Research results show that lateral-torsional coupled seismic design should be considered severely in this kind of vertical hybrid structure.

关 键 词：空冷支架结构 竖向混合结构 扭转效应 平扭耦联地震反应 多维地震作用 

分 类 号：TU311.3[建筑科学—结构工程]