框架合理结构体系的楼梯半滑支抗震设计
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摘要
采用框架结构的多层建筑或高层建筑中,楼梯结构与框架结构组成完整的楼房结构体系——框架-楼梯体系。楼梯结构的不适当连接将使得这个结构体系出现不良的特性,遭遇地震时楼梯发生严重破坏而阻断逃生通道。Pushover分析说明了这种楼房结构体系的不良特性。基于Pushover分析的结论,提出框架-楼梯体系中楼梯结构的一种合理处理方法,切断楼梯结构中传送水平荷载的路径,楼梯构件不参与楼房水平地震作用的传送,避免楼梯构件的破坏,便于使楼梯成为安全岛。
In a tier building or tall building with frame structure,the total building structural system consists of stairs structure and frame structure.This total structural system may be called frame-stairs system.Unreasonable joints of stairs structure can bring some bad characteristics of this frame-stairs system.Such unreasonable stairs may be destroyed badly in earthquake,and escape way may be cut off.The bad characteristics of this structural system were shown by push-over analysis.Based on the conclusions of push-over analysis,a kind of reasonable joint of stairs structure in frame-stairs system was put forward.By this kind of joint,the way transfering horizontal loads down in stairs was cut off.In this case,stairs elements won't participate in transfering down horizontal earthquake actions of building,and the destruction of stairs elements might be avoided.Adopting such structure,it may be possible for stairs to become safety island.
In a tier building or tall building with frame structure,the total building structural system consists of stairs structure and frame structure.This total structural system may be called frame-stairs system.Unreasonable joints of stairs structure can bring some bad characteristics of this frame-stairs system.Such unreasonable stairs may be destroyed badly in earthquake,and escape way may be cut off.The bad characteristics of this structural system were shown by push-over analysis.Based on the conclusions of push-over analysis,a kind of reasonable joint of stairs structure in frame-stairs system was put forward.By this kind of joint,the way transfering horizontal loads down in stairs was cut off.In this case,stairs elements won't participate in transfering down horizontal earthquake actions of building,and the destruction of stairs elements might be avoided.Adopting such structure,it may be possible for stairs to become safety island.
引文
[1]GB 50011—2010建筑抗震设计规范[S].
[2]GB50011—2001建筑抗震设计规范(2008年版)[S].
[3]魏巍,冯启民.几种push-over分析方法对比研究[J].地震工程与工程振动,2002,22(4):66-73.
[4]杨溥,李英民,王亚勇,等.结构静力弹塑性分析(push-over)方法的改进[J].建筑结构学报,2000,21(1):44-50.
[5]孙国华,何若全,高晓莹.push-over方法中一种考虑高阶振型影响的水平荷载分布模式[J].北京工业大学学报,2007,33(6):587-591.
[6]国家标准建筑抗震设计规范管理组.建筑抗震设计规范GB50011—2010统一培训教材[M].北京:地震出版社,2010:100-111.
[2]GB50011—2001建筑抗震设计规范(2008年版)[S].
[3]魏巍,冯启民.几种push-over分析方法对比研究[J].地震工程与工程振动,2002,22(4):66-73.
[4]杨溥,李英民,王亚勇,等.结构静力弹塑性分析(push-over)方法的改进[J].建筑结构学报,2000,21(1):44-50.
[5]孙国华,何若全,高晓莹.push-over方法中一种考虑高阶振型影响的水平荷载分布模式[J].北京工业大学学报,2007,33(6):587-591.
[6]国家标准建筑抗震设计规范管理组.建筑抗震设计规范GB50011—2010统一培训教材[M].北京:地震出版社,2010:100-111.
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