钢混凝土组合桁架的试验研究-结构工程专业论文.docxVIP

浙江大学硕士学位论文Abstract 浙江大学硕士学位论文 Abstract h company with the development of economy and society,the large-span floor slab will manifold inereasin舀y,while tlae composite f／russ，which is economical，and hnve large bearing capacity and snlall g在,uetural height，exlraordinarily suit to be manufactured∞large span floor slab．So it is necessary to study and do some experiments to understand the performance ofthe composite tlruss． After reviewing the research and appliealion aetuality of composite s衄la船s and composite IrllSSl!s．two pieces of composite IrtlsSe$a∞manufactured．To s∞the service performance ofthe steel smlcture s洲on oflrasses Emd to cheek whether they ate able to bear the load of casting conclete on it．Preloading lest is launched On the Surface oftwo pieces llusses whiela haven’t east collel埘e．And the results indicate that the fiefvice behaviors ofthe steel slltucture seetioo oftrusses ale in good condition and the load ofcasting concrete c觚be well supported． Then the eonerele is cast,in the ftrst place．dynamic propervy tests are done 013 the two trusses；in the second place．1#IIUS$is loaded with weight锄d 2群tfUSS is load with jack,and the test results of whiela ate analyzed．Atler damaging due to loading， dymaie property tests ale made 011 tWO tnl$$es agai皿while the frequency and modality of the fltate$of unloading，loading damage and artificial damage al-e Comparatively analyzed，which indicate that the damage of eomposile llllSSes influences the riCdity of 111e sllueture．8nd that the descending degree illclellse$with ltae growing degree ofstructure damage． The ANSYS modal of the composite ITllS$is established，and then the dynalniC property analysis and static calculation ofthe two n*usses on the eondition of loading arc carried through．After thai,the comparative analysis between calculating results and measured data is done．which prove that the numerical models m quite reasonable．Thea,011 the state of varyhlg the diameter of prestressed reinforcements， the changes ofd