剪力墙结构层间位移计算方法探讨
|
摘要
规范对高层剪力墙结构层间位移进行限制时,没有考虑结构体系侧移模式不同的影响,这对以弯曲变形为主的结构会造成很大的误差,甚至得出一些与实际情况完全不相符的结论。针对这一问题,本文根据剪力墙结构的受力特点,将楼层位移分为有害位移和无害位移,将层间位移分为名义层间位移Δui和有害层间位移Δui~,用倒三角形分布水平荷载的等截面悬臂杆件的弯曲变形曲线作为剪力墙结构的近似侧移曲线,从理论上分析了剪力墙结构的名义层间位移、有害层间位移、层间相对转角以及截面的弯曲曲率之间的关系,给出有害层间位移的实用计算公式。最后,对比分析了控制剪力墙层间变形的几种不同方法,并通过算例分析验证了本文方法实用可行,与实际情况符合较好。
When determining the allowable story drift ratio,the influence of different lateral displacements of structure systems is not considered in the Chinese Code for Seismic Design of Buildings.Then,for the structures in which the flexural deformation is dominative,large error will be made and some conclusions will not accord with the practice.To resolve this problem,according to the characteristic of shear wall structure,the floor displacement is divided into two parts,namely destructive floor displacement and nondestructive floor displacement.Similarly,the story drift is divided into nominal story drift and destructive story drift.In this paper,applying the inverted triangular distribution of lateral force to the cantilever wall with identical section,the lateral displacement mode is regarded as the approximate lateral displacement curve,and then,the relationships among nominal story drift,destructive story drift,interstory rotational drift angle and bending curvature of section is derived,and practical formulas to calculate the destructive story drift is presented. Finally,several different methods for controlling the story deformation of shear wall structure are contrasted and analyzed.By sample analyzing,the practical method for calculating the destructive story drift is confirmed and verified to be an improvement to the method of the code.
When determining the allowable story drift ratio,the influence of different lateral displacements of structure systems is not considered in the Chinese Code for Seismic Design of Buildings.Then,for the structures in which the flexural deformation is dominative,large error will be made and some conclusions will not accord with the practice.To resolve this problem,according to the characteristic of shear wall structure,the floor displacement is divided into two parts,namely destructive floor displacement and nondestructive floor displacement.Similarly,the story drift is divided into nominal story drift and destructive story drift.In this paper,applying the inverted triangular distribution of lateral force to the cantilever wall with identical section,the lateral displacement mode is regarded as the approximate lateral displacement curve,and then,the relationships among nominal story drift,destructive story drift,interstory rotational drift angle and bending curvature of section is derived,and practical formulas to calculate the destructive story drift is presented. Finally,several different methods for controlling the story deformation of shear wall structure are contrasted and analyzed.By sample analyzing,the practical method for calculating the destructive story drift is confirmed and verified to be an improvement to the method of the code.
引文
[1]GB 50101-2001建筑抗震设计规范.[S].北京中国建筑工业出版社,2002.
[2]JG J3-2002高层建筑混凝土结构技术规程[S]北京:中国建筑工业出版社,2002.
[3]徐培福,黄小坤.高层建筑混凝土结构技术规程理解与应用[M].北京:中国建筑工业出版社,2003.
[4]刘大海.高层建筑抗震设计[M].北京:中国建筑工业出版社,1993.
[5]杨志勇,何若全.高层、超高层建筑结构弹性阶段变形验算的研究[J].哈尔滨建筑大学学报,2001,34(5):14-18.
[6]魏琏.地王大厦结构设计若干问题[J].建筑结构,2002,30(6):31-36.
[7]魏琏.高层建筑结构位移控制研讨[J].建筑结构,2002,30(6):27-30.
[8]吕西林,王亚勇,郭子雄.建筑结构抗震变形验算[J].建筑科学,2002,18(1):11-15.
[9]郭子雄.高层RC结构小震作用下变形验算若干问题研究[J].华侨大学学报,1998,19(3):284-289.
[10]忻鼎康,胡绍隆,等.超高层混凝土结构的层间变形限值[J].建筑结构学报,2000,21(3):10-15.
[11]吴波,熊焱.一种直接基于位移的结构抗震设计方法[J].地震工程与工程振动,2005,25(2):62-67.
[2]JG J3-2002高层建筑混凝土结构技术规程[S]北京:中国建筑工业出版社,2002.
[3]徐培福,黄小坤.高层建筑混凝土结构技术规程理解与应用[M].北京:中国建筑工业出版社,2003.
[4]刘大海.高层建筑抗震设计[M].北京:中国建筑工业出版社,1993.
[5]杨志勇,何若全.高层、超高层建筑结构弹性阶段变形验算的研究[J].哈尔滨建筑大学学报,2001,34(5):14-18.
[6]魏琏.地王大厦结构设计若干问题[J].建筑结构,2002,30(6):31-36.
[7]魏琏.高层建筑结构位移控制研讨[J].建筑结构,2002,30(6):27-30.
[8]吕西林,王亚勇,郭子雄.建筑结构抗震变形验算[J].建筑科学,2002,18(1):11-15.
[9]郭子雄.高层RC结构小震作用下变形验算若干问题研究[J].华侨大学学报,1998,19(3):284-289.
[10]忻鼎康,胡绍隆,等.超高层混凝土结构的层间变形限值[J].建筑结构学报,2000,21(3):10-15.
[11]吴波,熊焱.一种直接基于位移的结构抗震设计方法[J].地震工程与工程振动,2005,25(2):62-67.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心