消能减震支撑体系研究与在高烈度区的工程应用

对高烈度地震区某6层混凝土框架结构办公楼应用由钢支撑和液体粘滞阻尼器组成的消能减震阻尼器支撑体系进行了抗震分析。利用ETABS软件对其在设防烈度8度(0.3g)的地震作用下的地震反应进行了非线性时程分析。计算分析表明,该类消能减震阻尼器支撑有良好的消能减震效果,为类似工程提供了较好的参考。     

采用粘滞阻尼器的某办公建筑消能减震设计与分析

文中以北京某办公楼采用粘滞阻尼器进行消能减震设计为例,介绍了结构消能减震设计中阻尼器的布置、时程分析地震波的选取、减震前后的效果分析及附加阻尼比的确定。结果表明,通过布置粘滞阻尼器,有效提高了结构的抗震性能,能够达到预期的消能减震设计目标。     

加强层结构和消能减震结构地震反应对比分析

以某超高层建筑为例,对比分析了加强层结构和带粘滞阻尼器的消能减震结构的地震时程反应,结果表明:消能减震结构的位移反应明显小于加强层结构,在地震作用下,消能减震结构能有效地减小结构的基底剪力,粘滞阻尼器消耗了大量输入到结构中的能量,有效地保护了主体结构.     

粘滞阻尼器在校舍框架结构抗震加固中的应用

在抗震鉴定结果不满足建筑结构整体抗震性能要求的既有建筑中,采用消能减震效果明显的粘滞阻尼器进行抗震加固,可减小结构的地震反应。以绵阳某中学学生公寓抗震加固为例,增设粘滞阻尼器后,按时程分析法进行减震效果分析,对比加固前后结构的层间剪力和层间位移角,结果表明在抗震加固工程中,采用粘滞阻尼器减震方案能有效提高建筑结构的整体抗震性能。     

某综合办公楼采用粘滞阻尼器的消能减震设计

介绍了高烈度区某 1 2层综合办公楼采用粘滞阻尼器的消能减震设计。设计中 ,在结构原拟设剪力墙的位置设置单斜撑粘滞阻尼器消能支撑 ,所采用的粘滞阻尼器为具有自主知识产权的速度线性相关型粘滞阻尼器。时程分析结果表明 ,粘滞阻尼器可大量耗散地震动能量 ,有效降低结构在地震作用下的振动反应。     

基于粘滞阻尼器的结构降度设计方法研究

介绍了液体粘滞阻尼器的性能及分析模型,针对设置液体粘滞阻尼器结构的特点,提出了消能减震结构基于液体粘滞阻尼器的降度设计方法。采用PKPM软件对某11层钢筋混凝土框架-剪力墙结构进行降度设计,利用ETABS软件计算了安装粘滞阻尼器减震结构的地震反应,分析了减震前、后结构的内力、位移和能量变化情况。结果表明,采用液体粘滞阻尼器对结构进行降度设计是可行的,减震结构的层间位移角满足规范要求,层间剪力有一定程度的减小,阻尼器消耗了绝大分部的地震输入能量,保证了主体结构的安全。     

某教学楼附加粘滞阻尼器减震控制研究

对处于高烈度地区的某中学教学楼进行了消能减震设计,对比分析了未附加阻尼器和附加粘滞阻尼器减震结构在多遇地震和罕遇地震作用下的抗震性能。结果表明:多遇地震作用下,附加粘滞阻尼器结构较常规结构基底剪力减少约30%,楼层侧移降低约15%,粘滞阻尼器消能减震效果明显;罕遇地震作用下,结构屈服机制合理,阻尼器耗能效果显著,与阻尼器相连接梁柱能可靠工作。     

消能减震结构的试算设计方法

在结构中如何确定阻尼器位置及相关参数是消能减震结构设计的关键问题.本文在仔细分析阻尼器参数特性的基础上,结合"择层设计"思想,提出了一种设置阻尼器消能减震的试算设计方法.如对于粘滞阻尼器,采用该方法可以快速确定阻尼器的位置、个数、粘滞阻尼系数和速度指数.计算实例表明,该方法简便有效,容易掌握.     

采用粘滞阻尼器对某幼儿园进行消能减震设计

以位于8度抗震设防地区的某框架幼儿园为研究对象,采用粘滞阻尼器消能减震设计,基于ETABS有限元分析软件,在小震和大震作用下对该框架结构的楼层剪力、层间位移角、减震前后框架柱的配筋对比等进行了减震前后的震动控制效果对比分析。结果表明:增设粘滞阻尼器后,该框架幼儿园的楼层剪力和层间位移角得到有效控制,小震作用下层间位移角的减震效果达到38.57%,大震作用下粘滞阻尼器充分发挥了耗能能力,有效改善了结构的安全性能,并达到预期抗震设计目标。     

采用不同减震结构体系的RC框架结构地震易损性分析

采用消能减震技术能有效提高结构的抗震性能，而不同减震结构体系减震效果不同。为了评估不同减震结构体系下的抗震性能，本文以某6层RC框架结构为研究对象，采用基于增量动力分析法的地震易损性分析方法，分别研究了增设防屈曲约束支撑、软钢阻尼器、粘滞阻尼器3种不同减震结构体系的抗震性能。研究结果表明：在同一减震目标下，3种不同的减震结构体系均能有效控制结构的地震响应，其中防屈曲约束支撑结构在不同损伤状态下的超越概率最小，抗倒塌储备系数最大，说明该阻尼器的控制效果最佳，其次是软钢阻尼器，最后是粘滞阻尼器。     

采用粘滞流体阻尼器的工程结构减振设计研究

本文在对不同结构构造的粘滞流体阻尼器的耗能原理进行分析研究的基础上,研制了一种性能良好的阻尼器──双出杆型粘滞流体阻尼器(专利号ZL00219648.4)。试验研究表明,研制的流体阻尼器是一种无刚度的速度相关型阻尼器,阻尼器的阻尼力与活塞的运动速度近似呈线性关系。介绍了工程结构采用粘滞流体阻尼器的减振设计原理,对一栋框架结构建筑进行了减振计算。计算表明,流体阻尼器可有效地降低结构的振动反应,是一种性能良好的消能减振装置。     

Dynamic experimental study of viscous damper on Chinese traditional style structure with dual‐lintel‐column joint of steel and composite structures

In order to analyze the dynamic mechanical properties of viscous damper on the concrete Chinese traditional style structure with dual‐lintel‐column joints under seismic excitation, we designed 3 specimens for dynamic cyclic loading, including 2 specimens with viscous damper, which called controlled structure and 1 specimen without viscous damper called noncontrolled structure. The failure process and corresponding failure mode were obtained. The failure characteristics, skeleton curves, and mechanical behavior such as the load‐displacement hysteretic loops, degradation of strength and rigidity, ductility and energy dissipation of the joints and the load‐displacement hysteretic loops of viscous damper were analyzed. Results indicate that the hysteretic curve of viscous damper on the concrete Chinese traditional style structure with dual‐lintel‐column joints and viscous damper are plumper, and the structure has good ductility and capacity of energy dissipation. In the study, the concrete Chinese traditional style structure with dual‐lintel‐column joints and viscous damper can work together in conjunction. The load‐bearing capacity of the controlled structure is significantly higher than that of the noncontrolled structure; the performance of ductility and the ability of energy dissipation are superior to those of the noncontrolled structure. All experimental results reflect that the seismic performance of the controlled structure is significantly superior to that of the noncontrolled structure.     

Dynamic experimental and numerical study of double beam–column joints in modern traditional‐style steel buildings with viscous damper

Modern traditional‐style steel (MTS) structure is an innovative architecture structure that is widely used in China. This paper explores the possibility of using viscous damper, which can be conveniently installed between beam and column, to replace “sparrow brace” at beam–column joints to improve its seismic capability. Three 1/2.6 scaled MTS double beam–column joints, one without viscous damper and two with viscous damper, were fabricated and tested under dynamic cyclic loading. The results indicated that the primary failure modes were cracking of base metal and local bucking at the beam ends. The hysteretic curve of specimens with viscous dampers was more plump than the common specimen without viscous dampers, indicating better energy dissipation capacity. The displacement ductility ratio was about 1.79–1.96, indicating the viscous damper has little effect on the ductility, whereas in plastic stage, the energy dissipation of specimens and viscous damper increased rapidly, indicating great energy dissipating function of viscous damper. Meanwhile, the results also proved that finite element analysis may stimulate and predict the mechanical behavior of MTS double beam joints with viscous dampers.     

大跨度钢结构楼盖的消能减振设计

文章介绍了某火车站高架候车大厅大跨度钢结构楼盖的消能减震设计.在楼盖指定钢梁的跨中安置TMD-粘滞流体阻尼器消能减振装置,消能减振装置包括TMD和粘滞阻尼器两部分,每个TMD由一个质量块和4个弹簧减振器组成,粘滞阻尼器选用无刚度的速度线性相关型阻尼器.分析计算表明,安装减振装置后,有效地削减了该楼盖的共振响应,所有工况...     

Experimental study and numerical analysis on seismic performance of steel beam‐column damping joint in Chinese traditional style buildings

This paper aims to research the seismic performance of steel beam‐column damping joint of Chinese traditional style building. Three specimens of steel beam‐column damping joints with the1:2.6 scale were designed and researched, which included two specimens with viscous damper and one contrast specimen without viscous damper. The experimental study was carried out by cyclic dynamic loading test. The effects of viscous dampers for the steel structure beam‐column joint in Chinese traditional style buildings are analyzed by investigating the hysteretic curves, skeleton curves, strength and stiffness degradation, ductility, overstrength factor, and energy dissipation capacity. The results show that the steel beam‐column joints of Chinese tradition style buildings with viscous damper have better energy dissipation capacity and higher bearing capacity. Based on the experiment, the nonlinear finite element analysis was conducted using the ABAQUS software. The influence of damping coefficient on the behavior of the new damping joint of Chinese tradition style buildings was obtained, and the design suggestions were presented.     

布置黏滞阻尼器的框架结构抗震性能分析

提出附设黏滞阻尼器的结构设计流程,以昆明某幼儿园工程为例,通过在结构上附设黏滞阻尼器,对比原结构和消能减震结构在地震作用下的最大层间位移角和最大层间位移,研究了高地震烈度区框架结构附设非线性黏滞阻尼器后的减震效果。结果表明:黏滞阻尼器对结构减震效果明显,合理布置黏滞阻尼器后,框架结构的抗震性能满足规范要求。研究为高地震烈度区附设黏滞阻尼器的框架结构抗震设计提供了参考。     

黏滞阻尼器有效刚度对结构的影响及其取值方法研究

目前,在进行消能减震结构分析时,通常忽略黏滞阻尼器的刚度,影响了结构受力与响应的准确性。为此,阐述黏滞阻尼器刚度特性及其对结构的影响,给出一种适用于时程分析的有效刚度迭代取值方法。对设置黏滞阻尼器消能减震模型、附加有效阻尼比等效模型和附加有效阻尼比与有效刚度等效模型的三组模型进行分析,研究黏滞阻尼器有效刚度对结构受力与响应的影响。结果表明:采用附加有效阻尼比与有效刚度等效模型分析得到的结构楼层剪力与层间位移角的变化趋势基本和采用消能减震模型分析的结果一致;采用附加有效阻尼比等效模型与采用消能减震模型分析的结果则相差较大;时程分析中采用提出的有效刚度迭代取值方法是可行的,建议黏滞阻尼器消能减震结构设计时考虑黏滞阻尼器有效刚度的影响。     

消能减震技术在某既有综合楼抗震加固中的应用研究

简要介绍了Sap2000中FNA方法的计算原理,结合既有综合楼采用消能减震技术进行了加固设计.通过对原结构地震反应分析,对抗震能力不足之处采取消能加固.结果表明,加固后有效降低了结构地震反应,达到抗震性能要求.     

减震结构粘滞阻尼器参数优化分析

研究了基于响应面法进行减震结构非线性粘滞阻尼器参数优化设计的方法,该方法包括试验设计、有限元分析、响应面函数拟合和参数优化.以一榀钢筋混凝土框架结构非线性粘滞阻尼器参数优化为例,以所有粘滞阻尼器提供的阻尼力之和最小为优化目标函数,层间最大位移限值作为约束条件,建立粘滞阻尼器参数优化的数学模型,然后运用非线性规划优化方法进行参数优化.算例研究结果表明:基于响应面法进行粘滞阻尼器参数优化,既能保证结构层间位移小于限值,又能降低建造成本.