建筑加(插)层改造工程中的隔震消能体系
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摘要
对建筑加(插)层改造的结构措施,传统的方法是增大截面、外包钢构架等。新增层的梁柱与原结构梁柱一般为刚性连接,连接处还要求保证结构抗震性能的构造措施到位。这些方法在施工工艺和达到期望的效果等方面都存在一定的困难,如柱的外包竖向钢筋、钢构架穿越楼板或穿越大梁,施工过程中都要造成原主体结构的部分损伤。文中探讨一种新的隔震消能结构体系,不将加(插)层部分与原结构直接刚接,而是通过滑移支座及粘滞阻尼器将两者连接起来,这样,在地震作用下,加(插)层部分可以发生相对于原主体结构的运动,从而起到隔震和消能作用,减小结构的地震反应。同时也对原主体构架增设消能装置,以减少结构整体所受的地震作用。文中通过一个工程实例,来说明该隔震消能结构体系的减震作用。
The traditional method of floor-adding and retrofitting of building is to enlarge the dimension of structural elements or wrap them with steel members,etc.Generally,beams and columns of the newly added floors are connected rigidly with the original structure.Besides,the constructional measures of the seismic performance of the conjunctions must be guaranteed.Such measures have some difficulties in construction and attaining expected results,for example,the added vertical steel bar of columns or steel members for wrapping columns should be set across floors or girders and the original structure is to be damaged in construction.This paper proposes a new energy isolated and dissipated structural system,the original structure and the later added floors are not connected rigidly,they are connected by sliding bearings and viscous dampers.Thus,the added floors can move relatively to the original structure under seismic action,and earthquake energy is isolated and dissipated,then the response of structure is reduced.Meanwhile,energy dissipated device is set on original structure to reduce earthquake vibration of the entire structure.A case engineering is put forward to demonstrate the seismic reduction effect of energy isolated and dissipated structural system in this paper.
The traditional method of floor-adding and retrofitting of building is to enlarge the dimension of structural elements or wrap them with steel members,etc.Generally,beams and columns of the newly added floors are connected rigidly with the original structure.Besides,the constructional measures of the seismic performance of the conjunctions must be guaranteed.Such measures have some difficulties in construction and attaining expected results,for example,the added vertical steel bar of columns or steel members for wrapping columns should be set across floors or girders and the original structure is to be damaged in construction.This paper proposes a new energy isolated and dissipated structural system,the original structure and the later added floors are not connected rigidly,they are connected by sliding bearings and viscous dampers.Thus,the added floors can move relatively to the original structure under seismic action,and earthquake energy is isolated and dissipated,then the response of structure is reduced.Meanwhile,energy dissipated device is set on original structure to reduce earthquake vibration of the entire structure.A case engineering is put forward to demonstrate the seismic reduction effect of energy isolated and dissipated structural system in this paper.
引文
[1]吕西林.建筑结构加固设计[M].北京:科学出版社,2001.
[2]冼巧铃,刘建安,周福霖.楼板隔震消能结构体系[J].地震工程与工程振动,2007,27(4):147-151.
[3]翁大根,宋文杰,周红卫.某办公楼消能隔震楼面设计与应用[J].结构工程师,2005(增刊):611-618.
[4]李爱群,瞿伟廉.工程结构减震控制[M].北京:机械工业出版社,2007.
[5]翁大根,卢著辉,徐斌,等.粘滞阻尼器力学性能研究[J].世界工程地震,2000,18(4):30-34.
[6]翁大根,陈廷君,吕西林,等.某钢筋混凝土框架增设阻尼器抗震加固分析[J].工程抗震与加固改造,2007,29(3):65-71.
[7]北京金土木软件技术有限公司.SAP2000中文版使用指南[M].北京:人民交通出版社,2006.
[8]中华人民共和国建设部.GB 50011—2001抗震设计规范[S].北京:中国建筑工业出版社,2001.
[2]冼巧铃,刘建安,周福霖.楼板隔震消能结构体系[J].地震工程与工程振动,2007,27(4):147-151.
[3]翁大根,宋文杰,周红卫.某办公楼消能隔震楼面设计与应用[J].结构工程师,2005(增刊):611-618.
[4]李爱群,瞿伟廉.工程结构减震控制[M].北京:机械工业出版社,2007.
[5]翁大根,卢著辉,徐斌,等.粘滞阻尼器力学性能研究[J].世界工程地震,2000,18(4):30-34.
[6]翁大根,陈廷君,吕西林,等.某钢筋混凝土框架增设阻尼器抗震加固分析[J].工程抗震与加固改造,2007,29(3):65-71.
[7]北京金土木软件技术有限公司.SAP2000中文版使用指南[M].北京:人民交通出版社,2006.
[8]中华人民共和国建设部.GB 50011—2001抗震设计规范[S].北京:中国建筑工业出版社,2001.
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