共查询到18条相似文献，搜索用时 140 毫秒
1.
软钢屈服耗能器的疲劳性能和设计准则 总被引：8，自引：0，他引：8
通过Ｘ形钢板屈服耗能器的疲劳试验研究和理论分析，建立了耗能器钢板的弹塑性应变分析方法。在选择恰当的疲劳模型的基础上，确定了应变疲劳参数，建立了Ｘ形和三角形钢板耗能器的疲劳设计准则，为这两种钢板屈服耗能器的参数设计提供了依据。 相似文献
2.
钢屈服—摩擦复合耗能器的性能研究 总被引：6，自引：1，他引：5
本文提出了“综合利用不同耗能原理和机制来设计新型耗能器”的思想,研究开发了钢屈服－摩擦复合耗能器,并对其进行了性能试验和对比试验,考察了耗能器的工作性能和耗能性能。给出了耗能器的恢复力模型,研究结果表明,钢屈服－摩擦复合耗能器利用钢屈服滞回和摩擦两种机制耗能,具有稳定的工作性能,耗能能力强且可调节,构造简单,形状紧凑,体积小,造价低,制作与安装方便,是一种有广阔应用前景的新型耗能减震装置。 相似文献
3.
钢板屈服耗能器的薄膜效应分析 总被引：2，自引：1，他引：2
通过对钢板屈服耗能器的薄膜效应分析，指出了薄膜效应是此类耗能器中不忽视的因素，然后提出了反复荷载作用下薄膜应变的计算方法，建立了考虑薄膜效应的疲劳验算准则，为这类耗能器的参数设计提供了基础。 相似文献
4.
拟粘滞摩擦耗能器的性能试验与分析 总被引：8，自引：1，他引：7
在分析粘滞耗能器的优缺点和Ｐａｌｌ摩擦耗能器构造特点的基础上,提出了拟粘滞摩擦耗能器,进行了拟粘滞摩擦耗能器的滞回特性试验和疲劳性能试验,试验结果表明,拟粘滞摩器基本实现了粘滞耗能器的主要力学特征：在试验结果的基础上建立了拟粘滞摩擦耗能器的恢复力模型。 相似文献
5.
两种摩擦耗能器的比较试验研究 总被引：9，自引：2，他引：9
对两种不同形式的摩擦耗能器进行了低周反复荷载试验。工其工作性能和耗能性能，并进行了带有不同摩擦片和不带摩擦片的对比试验，分析了影响耗能器性能的因素，试验结果表明，摩擦耗能支撑具有稳定的滞回性能和极好的耗能能力，摩擦片的类型与性能对摩擦耗能支撑的性能有较大的影响。 相似文献
6.
组合钢板耗能器—一种新型耗能减震装置 总被引：7，自引：0，他引：7
本文在吸收普通钢板耗能器和Ｐａｌｌ摩擦耗能器优点的基础上提出了组合钢板耗能器，建立了相应的力学分析和计算模型；通过地震反应分析检验了其减振效果，并与普通钢板耗能器进行了对比。研究结果表明，组合钢板耗能器是一种构造简单，耐久性好，减效果和经济效果俱佳的抗震效果，具有广阔手应用前景。 相似文献
7.
采用粘性屈服模型来模拟摩擦耗能器的力－速度关系，建立了摩擦与粘性流体耗能器串联耗能体系的动力分析方法．为考虑框架杆件和支撑材料的几何非线性，采用增量型Ｒｏｓｅｎｂｒｏｃｋ二级三阶半隐式Ｒｕｎｇｅ－Ｋｕｔｔａ法求解动力方程．比较了仅有摩擦耗能器体系与串联组合耗能体系的减振效果，分析了粘性流体耗能器参数对组合耗能体系减振效果的影响。 相似文献
8.
摩擦耗能框架体系动力分析 总被引：4，自引：0，他引：4
采用粘性屈服模型来模拟摩擦耗能器的力－速度关系。建立了带有摩擦耗能器体系的动力分析8方法，采用增量型Rosenbrock二阶三阶半隐式Runge-Kutta法求解动力方程，得到了带有摩擦耗能器单层框架在正弦波激励下反应的解析解，并据此验证粘性屈服模型及求解动力方程算法的正确性，分析了摩擦耗能器的起滑力和支撑刚度对耗能减振效果的影响。 相似文献
9.
采用粘性屈服模型来模拟摩耗能器的力－速度关系，建立了摩擦与粘性流体耗能器串联耗能体系的动力分析方法，为考虑框架杆件和支撑材料的几何非线性，采用增量型Rosenbrock二级三阶半隐式Runge-Kutta法求解动力方程，比较了仅有摩擦耗能器体系与串联组合耗能体系的减振效果，分析了粘性流体耗能器参数对组合耗能体系减振效果的影响。 相似文献
10.
结构被动耗能减振效果的参数影响 总被引：58，自引：6，他引：52
本文研究粘滞、粘弹、金属屈服和摩擦型上类与斜撑串联的被动耗能器对结构减振效果的参数影响。首先,建立了结构、耗能器和斜撑共同工作的计算模型;然后考虑不同耗能器的特点,给出了相应的运动方程;第三,通过大量的数值计算,研究了耗能器刚度（或耗能器与斜撑的组合刚度）、屈服位移等参数对结合减振结果的影响,得到了这些参数的最佳取值范围,从而为结构的耗能减振设计提供了基础。 相似文献
11.
本文采用耗能减震技术，根据建筑结构抗震规范规定的反应谱法，利用ＣＴＡＢ程序对云南省洱源县振戎中学食堂进行了抗震计算分析和设计验算．首先对未加耗能减震装置的空框架结构进行了小震下的位移和强度验算以及大震下的位移验算；其次，介绍了本工程选用的Ｔ字芯板摩擦耗能器的工作原理，并对耗能器进行了足尺性能试验；第三，根据工程结构的环境特点和建筑使用功能要求，确定了耗能减震方案；最后，对耗能减震结构进行了抗震验算和分析，结果表明，附加耗能器后的工程结构抗震性能得到了明显改善． 相似文献
12.
A new steel framing system for seismic protection of timber platform frame buildings. Implementation with hysteretic energy dissipators 
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下载免费PDF全文 This paper describes a new seismic protection system for timber platform frame buildings, either for new construction or retrofit. The system consists in connecting the timber frame to a steel structure that includes hysteretic energy dissipators designed to absorb most of the seismic input energy thus protecting the timber frame and the other steel members; alternatively, the system might use other types of dissipative devices. The steel structure consists of four steel stacks (located at each of the four façades) and steel collectors embracing each slab; the stacks and the collectors are connected, at each floor level, through the energy dissipators. The steel structure is self‐supporting, that is, the timber frame is not affected by horizontal actions and can be designed without accounting for any seismic provision; in turn, the steel members do not participate in the main load‐carrying system. The timber‐steel interface is designed to avoid any stress concentration in the transfer of horizontal forces and to guarantee that the yielding of the dissipators occurs prior to any timber failure. The energy dissipation capacity of the suggested system is discussed, and an application example on a six‐story timber building is presented; this case corresponds to highly demanding conditions because of the relatively large building height and weight, the high local seismicity, and the soft soil condition. This research belongs to a wider project aiming to promote the structural use of timber by improving the seismic capacity of wooden buildings; this research includes experiments and advanced numerical simulation. Copyright © 2014 John Wiley & Sons, Ltd. 相似文献
13.
Experimental study of friction dissipators for seismic protection of building structures 总被引：1，自引：1，他引：0
This paper presents the results from unidirectional shaking table tests of two reduced scale steel models of a building frame, with one and two floors, respectively. These frames incorporate friction dissipators at every floor. The inputs are sine-dwells and artificial and registered earthquakes. This study is part of a larger research project aiming to assess the seismic efficiency of friction dissipators by means of an integrated numerical and experimental approach. Inside this framework, the main objectives of these experiments are to: (i) collect a wide range of results to calibrate a numerical model derived within the project, (ii) clarify some of the most controversial issues about friction dissipators (including behavior for inputs containing pulses, capacity to reduce resonance peaks, introduction of high frequencies in the response, and self-generated eccentricities), (iii) better understand their dynamic behavior, (iv) provide insight on the feasibility and reliability of using simple friction dissipators for seismic protection of building structures and (v) characterize the hysteretic behavior of these devices. Most of these objectives are satisfactorily reached and relevant conclusions are stated. 相似文献
14.
Viscous energy dissipators (EDORs) have good suppressing effects on acceleration or base shear and they do not add axial pressure to the column when peak moment in the column occurs at peak displacement. Pall frictional EDORs can dissipate energy even when the compression brace buckles due to a special frictional damping mechanism. Retaining the advantages of viscous and Pall EDORs and overcoming their disadvantages, a pseudo‐viscous frictional energy dissipator (PVEDOR) is developed. PVEDORs use the frictional damping mechanism of Pall EDORs, but the slip force of PVEDORs is made variable so that the slip force reduces with increasing displacement. Behaviour testing of PVEDORs shows that they possess the important hysteretic feature of viscous EDORs, i.e. the restoring force of PVEDORs are out‐of‐phase with displacement. Earthquake simulation tests of a 16‐storey frame structure incorporating PVEDORs and ordinary steel braces and bare frame are carried out. The test results show that PVEDORs have good vibration‐suppressing effects. An analytical hysteretic model of PVEDORs basically agrees with the behaviour testing results. Finally, the parameter influence of PVEDORs on suppressive effectiveness of structural vibration under earthquake conditions is studied. Numerical analyses show that PVEDORs have good control effects on both seismic displacement and acceleration, and that control effects of PVEDORs on base shear are much better than Coulomb‐type frictional EDORs or metallic EDORs. Copyright © 2002 John Wiley & Sons, Ltd. 相似文献
15.
振戎中学食堂楼耗能减震分析与设计(Ⅰ)－反应谱法 总被引：2，自引：0，他引：2
本文采用耗能减震技术，根据建筑结构抗震规范规定的反应谱法，利用CTAB程序对云南省洱源县振戎中学食堂进行了抗震计算分析和设计验算。首先对未加耗能减震装置的空框架结构进行了小震下的位移和强度验算以及大震下的位移验算；其次，介绍了本工程选用的T字芯板摩擦耗能器的工作原理，并对耗能器进行了足尺性能试验；第三，根据工程结构的环境特点和建筑使用功能要求，确定了耗能减震方案；最后，对耗能减震结构进行了抗震验算和分析，结果表明，附加耗能器后的工程结构抗震性能得到了明显改善。 相似文献
16.
内藏X形软钢板铅复合耗能器的试验研究 总被引：4，自引：1，他引：3
遵循“综合利用不同耗能原理或机制来设计新型耗能减震器”思想,研制了内藏X形软钢板铅复合耗能器,并对三种不同构造方式的软钢铅复合耗能器以及一种软钢组合耗能器进行了循环加载的对比试验,分析了这四种耗能器的工作性能与耗能性能,揭示了耗能机制。研究结果表明：内藏X形软钢板铅复合耗能器具有初始刚度较大、极限承载力较高、变形能力与耗能性能良好的特点。因为这种耗能器造价低廉、构造简单、安装方便,有一定的应用价值。 相似文献
17.
This paper presents a 2-D numerical study on the nonlinear seismic response of buildings equipped with two types of energy dissipators, which dissipate energy activating two different mechanisms. Three types of reinforced concrete buildings with 3, 7 and 15 stories, respectively representative of short, medium and long period ranges, are considered. Dissipators are placed on steel diagonal braces at all the floors; their sliding threshold (or yielding) forces are taken as 100% of those generated by the equivalent static lateral forces recommended by EC8 for a ductile moment resisting frame. The input consists of six recorded earthquakes, 3 representatives of near-field earthquakes and 3 representatives of far-field earthquakes. Each input is considered once from the bedrock and once filtered by a common ground with several layers of different thicknesses. The responses of the buildings are discussed and compared emphasizing the filtering effects produced by the ground. 相似文献
18.
为研究钢筋砼摩擦耗能支撑框架结构的动力反应性能 ,对其中的摩擦耗能器单元和框架杆单元的单元刚度和力学模型做了分析。钢筋砼摩擦耗能支撑单元由支撑杆单元和钢板—橡胶摩擦耗能器单元组成 ,支撑单元可取空间杆单元 ,摩擦耗能器单元为平面应力矩形单元。摩擦耗能器单元的剪切恢复力曲线为理想的弹塑性曲线 ,根据耗能器单元的力学模型 ,可确定其在每一时刻的刚度 ;框架结构空间杆单元的恢复力模型采用双线型模型 ,根据杆单元的力学模型 ,可确定其在每一时刻的刚度。并利用所编制的程序对十层单榀两跨空间普通框架和摩擦耗能支撑框架在地震作用下进行了弹塑性反应时程分析 ,结果表明耗能支撑框架的顶层最大位移明显小于普通框架 相似文献