6 ) the thermo - mechanical behaviors of sma fiber reinforced smart structures with damages have been analyzed by utilizing the shear lag model and variational principle . mathematical expressions on meso - displacement field , stress - strain field of typical element with damages have been presented , and a failure criterion of interface between sma wires and base material is established . a geometric characterization on the failure criterion has also been made via an example
22.
Based on the calculated results of the computer program , varied stress contribution curves of short leg walls with t , l and + shaped sections are shown in the paper , together with deformation information of members . to measure the influence of shear lag , the equivalent bend stiffness of short leg walls is introduced . the discounting coefficients of the bend stiffness of members can be used in the bars - system models of short leg walls building structures
23.
The plexiglass model test is carried out by two selective shape , the stress of each test operating loads was obtained in order to validate the correctness of the finite element modeling . in this paper , a regularity of shear lag effect of main sections in two kinds of box girder is given . as the foresight project of double - level - driveway continuous box girder , this research fully utilizes the space of box girder structure and flexural and torsional properties of high - depth box girder , which have innovative significance and applied foregroundin engineering
24.
Modeling the general solid web continuous box girder and opening - in - web ( open web ) continuous box girder by ansys finite element modeling tool , node stress of governing section and corresponding shear lag values are analyzed . the solution is validated by comparing with variational results and modeling test values . based on the model , the section shear lag induced by dead load , prestress tendons and car loads under the most unfavorable condition and lateral symmetry are also approached . the influence of shear lag effect in double - level continuous box girder is considered with opening - in - web and the web location . the analysis indicates that double - level - load arouses less shear lag effect than one - level - load . when self - weight and prestressed tendons act on together , the shear lag effect on box girder take on a evidently change
25.
The full range analysis from cracking to crashing of box girder are conducted in detail to ascertain the response for the structure to load , and the parametric study about the shear lag of box girder within the nonlinear stage has been finished and some profitable conclusions have been obtained as well
26.
The project is completed in the collaboration of the transportation college of jilin university and transportation science institute in jilin province . the paper mainly studies the characteristics and mechanical performance of small size member of bridge , the problems of concrete dense degree and shear lag effect of wide flange . the static load test and supersonic nondestructive test of four pieces of prestressed i - girder with varying section are carried out in bridge structure laboratory of jilin university
27.
Based on the minimum potential energy principal , the influences of three loads , which are concentrated force , trapezoidal load and sinusoid load , over shear lag of cantilever single - box - single - cell box girder are deducted and discussed , and a conclusion is reached , which has some instructive significance for designer to determine the sectional dimension and reinforcing bars ; the bending normal stress changes greatly as considering the shear lag effect
28.
The work in this thesis mainly includes following parts : 1 . as for box girder cross section , the three - bar stimulation method under typical loads and supports has been introduced . the force and stress formulae for flanges have been derived from the three - bar method . by reasonable simplification for multi - cell box girder , the three - bar method has been applied in multi - cell box girder ' s shear lag analysis
29.
There are two contents in this paper : one is solve the control differential equation of box girder " s shear lag by dq method , the other is rules of the shear lag for single - box - multiple - cell box girders . first we introduce what is shear lag and the status of research ; we introduce dq method and use dq method to solve several bridges in the third chapter ; also we introduce the software - ansys and analysis several bridges by ansys in chapter iii ; in chapter iv we assume several bridge models and get the stress distribution under concentrated load and distributed load ; we summarize the paper in chapter v and propose the advancing direction of shear lag
30.
In this paper , a generalized hybrid finite strip method is deduded for analyzing the shear lag effect in box girders . it has the advantage of the generalized finite strip method and hybrid stress element . shear lag effect in thin - walled box girder is analyzed with this method and stiffness matrix of generalized hybrid finite strip element is deduced . a calculating program for thin - walled box girder " s generalized hybrid finite strip method is compiled with fortran language and performed in visual fortran environment of pc computer . a typical example demonstrates that the proposed method has higher accuracy and efficiency , is suitable for analysis of shear lag effect in box girders
