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A review of thin-walled built-up cross-section assemblies

Abstract

The goal of this research is to review the methods of assembly of the thin-walled built-up cross-sections, cross-section shapes and shape selection reasons. Different author’s experimental studies of the thin-walled built-up cross-sections of various lengths and shapes have been reviewed. The cross-section of the thin-walled built-up columns is assembled by connecting two or more profiles at their webs or flanges. The cross-section can be assembled indirectly – by using intermediate plates. The connections of the profiles and plates can be self-drilling screws, bolts, rivets or welds. The step of the thin-walled profile connections has an impact to the load bearing resistance of the cross-section. The increase to the load bearing capacity of the cross-section can be up to 16% when profiles without stiffeners are connected with a smaller connection step. The effect to the load bearing resistance of the decrease of the connection step length of the thin-walled cross-sections made of profiles with stiffeners was insignificant and sometimes unfavourable. Different cross-sections were analysed, and their effectiveness was compared. The more effective were cross-sections with a higher cross-section height and width, assembled of profiles with web and flange stiffeners. The ratio of the strength of the axial compression to the cross-section area of the built-up columns can be up to 80% higher when built-up cross-section is assembled using profiles with stiffeners, compared to the built-up cross-sections assembled using profiles without stiffeners.


Article in Lithuanian.


Sudėtinio skerspjūvio plieninių plonasienių kolonų skerspjūvio formų apžvalga


Santrauka


Šio tyrimo tikslas – išnagrinėti sudėtinio skerspjūvio plieninių plonasienių kolonų surinkimo būdus, skerspjūvių formas ir formų parinkimo priežastis. Atliekant tyrimą išanalizuoti įvairių autorių eksperimentiniai tyrimai, atlikti su skirtingų ilgių ir formų sudėtinio skerspjūvio plieninėmis plonasienėmis kolonomis. Plonasienių kolonų sudėtinis skerspjūvis sudaromas jungiant du ar daugiau profiliuočius sienelėmis arba juostomis. Profiliuočiai gali būti jungiami ir netiesiogiai – naudojant tarpines plokšteles. Jungtys sudaromos savigręžiais, varžtais, kniedėmis ar suvirinant lakštus. Profiliuočių jungimo žingsnis turi įtakos sudėtinio skerspjūvio laikomajai galiai: kai jungiami profiliuočiai be sąstandų, mažinant jungių žingsnį, gaunamas skerspjūvio sustiprėjimas iki 16 %; kai jungiami profiliuočiai su sąstandomis, mažinant jungių žingsnį, poveikis skerspjūvio laikomajai galiai yra nežymus ir kartais neigiamas. Išanalizuoti skirtingi skerspjūviai ir tarpusavyje palygintas jų efektyvumas – pastebėta, kad efektyvesnės yra didesnio skerspjūvio aukščio ir pločio kolonos, sudarytos iš profiliuočių su sienelių ir juostų sąstandomis – kolonų centriško gniuždymo laikomosios galios su plotu santykis gali būti iki 80 % didesnis sudėtiniuose skerspjūviuose, suformuotuose naudojant profiliuočius su sąstandomis, lyginant su skerspjūviais, suformuotais iš profiliuočių be sąstandų.


Reikšminiai žodžiai: plieninės plonasienės konstrukcijos, sudėtinio skerspjūvio kolonos, apžvalga, eksperimentinių rezultatų analizė, klupumas, skerspjūvio surinkimas.

Keyword : thin-walled structures, built-up columns, overview, experimental result analysis, buckling, cross-section assembly

How to Cite
Stulpinas, M. (2023). A review of thin-walled built-up cross-section assemblies. Mokslas – Lietuvos Ateitis / Science – Future of Lithuania, 15. https://doi.org/10.3846/mla.2023.16914
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Mar 27, 2023
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