抗震设计非弹性位移反应谱研究

摘要反应谱理论是抗震设计的主要理论之一，在抗震设计中占有重要地位，自其产生以来，经过众多学者的研究探索，其发展已日趋成熟。反应谱理论主要反映结构在弹性变形内的力学特性，但研究表明在地震动作用下，结构通常由弹性阶段进入塑性阶段，即其后期变形已不满足弹性特性。如果继续以反应谱理论进行抗震设计，会造成材料的极大浪费，这是很不经济的。现阶段基于弹塑性变形的抗震设计之一就是在反应谱理论基础之上引入 “ 强度折减系数 ” ，以反映结构进入非线性变形的受力特点。因此对反应谱理论以及由此而引出的强度折减系数，进行进一步的研究，仍然是当前抗震设计的主要研究方向之一。本课题从 “ 太平洋地震工程研究中心 ” 下载世界各地的强震记录，按我国抗震设计规范进行场地分组，研究不同场地的反应谱特点，探求反应谱的更精准更普遍的特性。继而利用 “ Bespec ” 软件研究不同场地的强度折减系数模型，并对其分析结果进行回归分析，探求不同场地强度折减系数的数学模型。研究表明，当前的研究成果与实际现象仍有差距，在根据实测现象进行回归分析的基础上，对其基本理论进行深入研究更显必要。56697
毕业论文关键词：反应谱理论；非线性位移；强度折减系数；场地分组
Abstract bstract bstract bstractR esponse spectrum theory is one of the main theoretical of Seismic design ,whichplays an important role i n the seismic design . Generated from its inception, through manyscholars research , its development has matured . Response spectrum theory mainly reflectedthe mechanical properties of elastic deformation in the structure. But studies show that inthe action of the ground motions, structures are usually made of elastic stage to plasticstage, that is, its post-deformation elastic properties have been satisfied . If you continue toseismic design by using response spectrum theory, it will cause a great waste of material,which is very un economical .By now the introduction of the "strength reduction factor"isone of the basis of the theory on seismic design response spectrum in the e lastic - plasticdeformation stage based in order to reflect the structure of the force into the nonlineardeformation characteristics . So to further research the response spectrum and the strengthreduction factor is still one of the main research directions of current seismic design . Thistopic download s strong motion records around the world from the "Pacific EarthquakeEngineering Research Center" ,and make them groups according to China's seismic designcode .Then s tudy the response spectrum characteristics of different venues and explore amore precise more general characteristics of response spectrum . Then use "Bispec"software to research the strength reduction factor model in different venues .Then make aregression analysis for the results of analysis to explore the strength reduction factormathematical model s of different venues . Research shows that the current research resultsand practical phenomena are still gaps .So the in-depth study of its basic theory by using theregression analysis based on the measured phenomena is more necessary.K
Keywords: Response spectrum ; Non - linear displacement ; Strength reduction factor ;Venue group .

第一章绪论 . 1

1.1 反应谱理论的发展现状 1

1.2 反应谱理论的基本假定及其局限性 1

1.3 非弹性位移反应谱 2

1.4 现有非弹性位移反应谱研究所存在问题 3

1.5 本文的主要内容 4

第二章反应谱基本理论 ... 5

2.1 反应谱概念 . 5

2.2 反应谱理论计算方法 . 7

2.3 反应谱的数值计算方法 ... 10 抗震设计非弹性位移反应谱研究:http://www.751com.cn/jixie/lunwen_61269.html