The disposal of steel staggered truss system and the calculation of shear rigidity 鋼結(jié)構(gòu)交錯桁架體系布置及剪切剛度計算
Relationship between the shearing rigidity of woven fabrics and fabrics ' structure parameters 梭織物剪切剛度與交織結(jié)構(gòu)的關(guān)系
In this paper , for the first time , floor stiffness is denoted as shear stiffness , which reflects the influence of floor length to width ratio more effective than floor bend - shear stiffness 本文首次把樓板的剛度用剪切剛度表示,它比樓板的彎剪剛度更能體現(xiàn)樓板長寬比對樓板剛性的影響。
Abstract : based on the deformation characteristics of the tread element at typical load cases , this paper determines the displacement functions of the element by using the energy method and derives the theoretical formulae for the apparent compressive stiffness and shearing stiffness calculation 文摘:根據(jù)輪胎胎面單元在典型工況的變形特點,用能量法確定了胎面單元變形的位移函數(shù),導出了輪胎胎面單元表觀壓縮剛度和表觀剪切剛度的理論計算式。
According to regress , the paper got equivalent shearing stiffness and equivalent damping gene ' s calculating formula of the hdr ' s equivalent linear model . at last , the paper estimates the effect of integrated isolation bearing with a 4 span continuous beam bridge by nonlinear dynamic analysis program 根據(jù)能量相等的原則,本論文提出了高阻尼橡膠剪切滯回曲線的雙線性模型和模型中各參數(shù)的計算公式;回歸出了用剪應變表示的等價線性化模型的等價剪切剛度和等價阻尼比實用計算公式。
After mechanical and process properties testing , the results indicated that : ( 1 ) the film resin can make the properties good in climbing drum peer strength of sandwich constructions composite , the little effects of the film resin on other mechanical properties have been given ; ( 2 ) the sandwich composite has the better mechanical properties at central symmetry layer than asymmetric layer ; ( 3 ) through the study of the different pressure of the sandwich composite , the result is obtained that the edgewise properties increases , the flexural properties decreases with the pressure increase from 0 . 2mpa to 0 . 5mpa ; ( 4 ) at the sameness extend layer , the mechanical properties of the laminate is bigger than that of the honeycomb sandwich panel ; ( 5 ) through the studies on honeycomb sandwich plate delamination under three - point bending tests . it is found that the flexural strength decreases with the area of delamination increases 研究表明: ( 1 )膠膜能明顯的提高蜂窩夾層結(jié)構(gòu)的剝離性能,對其它性能的影響不大; ( 2 )對稱鋪層較非對稱鋪層的力學性能高; ( 3 )固化壓力由0 . 3mpa提高至0 . 5mpa時,蜂窩夾層結(jié)構(gòu)的側(cè)壓強度提高,而彎曲強度和剪切剛度分別降低; ( 4 )蜂窩夾層結(jié)構(gòu)中的面板較同樣材料鋪層的復合材料疊層板的力學性能低; ( 5 )蜂窩夾層結(jié)構(gòu)的界面上有缺陷時,彎曲強度下降,且隨著缺陷面積增大,彎曲強度下降幅度增大。
Restoring force vector in dynamic equation and restoring force model of vertical - line and coupling beam are probed . for vertical - line restoring force model , the influence of stress are considered , which make deformation and stiffness of the model rational , coupling beam restoring force model may accurately imitated real conditions of scoupling beam . dztsd is developed by matlab , which is a program of elasoplastic time - history analysis in tall short - leg shear wall building 分析確定了短肢剪力墻彈塑性動力分析模型中拉壓桿的軸向恢復力模型和剪切恢復力模型,以及連梁的恢復力模型,對于剪切恢復力模型考慮了正應力大小對剪切剛度的影響,從而使模型的變形及剛度取值更符合實際情況,連梁的恢復力模型采用考慮剛度退化的三折線型,可以較準確地模擬連梁的工作狀況。
The ratio of story shear rigidity as well as the equivalent lateral rigidity ratio of story above the transfer story to the story under the transfer story should be designed properly to avoid the transfer story becoming weak story , thus the shear walls and the columns in the large base will not yield before the elements above the transfer story ; ( 2 ) the translation - torsion coupled effects and the vibration in the plane should be considered in analysis of structure with large base and muti - towers 轉(zhuǎn)換層的設計除應控制層剪切剛度比外,還應控制轉(zhuǎn)換層上部與下部結(jié)構(gòu)的等效側(cè)向剛度比以避免薄弱層出現(xiàn)在框支層,保證地震作用下落地剪力墻和框支柱不先于轉(zhuǎn)換層上部結(jié)構(gòu)進入屈服狀態(tài);大底盤多塔樓結(jié)構(gòu)的分析必須考慮平扭耦聯(lián)振動和樓板平面內(nèi)振動的影響。
This paper uses of the actual mechanics form , cantilever bending stiffness is adopted in the mega structure , however shearing stiffness in the sub structure . based on the complex mode theory , this paper gains the expression of dynamical response of the system based the model of municipal no . l building of tokyo city and analyses the affection of the main parameters ( stiffness and damping ) on the two configurations ( sustaining type and hang type ) . the results indicate that the rational stiffness of the sub structure can control the deformation of the mega structure perfectly , but the acceleration of the sub structure increases at the same time 本文采用了更接近實際的力學模型,主結(jié)構(gòu)采用彎曲剛度,子結(jié)構(gòu)采用剪切剛度,利用隨機振動復模態(tài)理論,推導了巨型框架減振結(jié)構(gòu)的動力響應表達式,并以日本東京市政一號樓為基本模型,討論了巨型框架減振結(jié)構(gòu)兩種結(jié)構(gòu)形式(座承式和懸掛式)的主要參數(shù)(剛度和阻尼)對減振效果的影響,結(jié)果表明:與普通巨型框架結(jié)構(gòu)相比,減振結(jié)構(gòu)通過合理選擇子結(jié)構(gòu)剛度,可以較好的控制主結(jié)構(gòu)在順風向脈動風作用下的位移響應,從而提高結(jié)構(gòu)的安全性,但與此同時,子結(jié)構(gòu)自身的加速度響應也有了一定程度的提高。
( 2 ) 3d - fem analysis for the load - bearing capacity of the stud connector as the prevailing method to determine the shear rigidity and the limit load - bearing capacity of the shear connector is the push test , which is time consuming and laborious , in this thesis the push tesi specimen of the stud connector is simulated through the non - linear analysis module of the msc / nastran and the numerical analysis results are in good coherence with that of the practicality lev ; as a result , the shear rigidity and the limit load - bearing capacity of the stud connector can be determined by the finite element method and only a few practicality verification tests ( 2 )栓釘型剪力鍵承載力的3d - fem分析針對當前剪力鍵一般通過費時費力的推頂試驗來確定抗剪剛度和極限承載力的狀況,本文利用msc nastran非線性模塊實現(xiàn)了對栓釘剪力鍵推頂試樣的數(shù)值模擬分析,數(shù)值計算結(jié)果與試驗結(jié)果能夠很好吻合。這使得通過有限元方法的模擬和少量實物試驗的驗證,就能確定栓釘剪力鍵的剪切剛度和極限承載力,可以大大節(jié)省時間和經(jīng)費。