Seismic performance of circular reinforced concrete columns subjected to compression, bending and torsion with low and moderate shear span ratio

• Autorzy: Jiao Chiyu , Liu Yang , Wei Biao , Li Jianzhon , Hu Zhangliang , Zhu Gexi

Identyfikatory

DOI

10.1007/s43452-021-00282-8

• Języki publikacji: EN

Abstrakty

EN

Under the action of an earthquake, the piers of urban curved bridges are usually subjected to compression, bending and torsion due to the geometric irregularity and with low and moderate shear-span ratio. To explore the seismic performance of piers under combined actions, this paper made a theoretical analysis on the seismic performance of four circular RC columns under combined action with low and moderate shear-span ratio through experimental research. Taking the shear-span ratio and torsion-bending ratio as the main variables, cyclic bending loading and combined cyclic bending and torsion loading were carried out on the columns, respectively. The results showed that the increase of torsional effect and shear effect will increase the failure height of the piers and weaken the energy dissipation capacity and bearing capacity. Through the extraction of characteristic points in the test data, the relationship between force, displacement and torsion-bending ratio of columns with shear-span ratio below 4 was fitted. The bending and shear restoring force models of columns with spiral stirrups and small torsion-bending ratio were established. Moreover, based on the variable angle truss theory, the concrete improvement coefficient β was introduced, and the formula of torsional bearing capacity of columns under combined actions with low and moderate shear-span ratio was deduced. Compared with the test data, when the value of β was taken as 1.1, the proposed formula could be well applied to the calculation of bearing capacity of piers with torsion-bending ratio below 0.2 under combined actions with low and moderate shear-span ratio.

Słowa kluczowe

EN

curved bridge; restoring force model; compression bending shear torsion coupling force; theoretical analysis; quasi-static test

PL

most; zginanie; ściskanie; skręcanie

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2021
• Tom: Vol. 21, no. 3
• Strony: 836--851
• Opis fizyczny: Bibliogr. 21 poz., fot., rys., wykr.

Twórcy

autor

Jiao Chiyu

• Beijing Advanced Innovation Center for Future Urban Design, Beijing University of Civil Engineering and Architecture, 1 Exhibition Hall Road, Beijing 100044, China
• State Key Laboratory of Disaster Prevention in Civil Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China

autor

Liu Yang

• Engineering Structure and New Materials Research Center of Beijing Higher Education Institutions, Beijing University of Civil Engineering and Architecture, 1 Exhibition Hall Road, Beijing 100044, China
• Multi-Functional Shaking Tables Laboratory, Beijing University of Civil Engineering and Architecture, 1Exhibition Hall Road, Beijing 100044, China

autor

Wei Biao

• School of Civil Engineering, Central South University, 68 South Shaoshan Road, Changsha 410075, China
• National Engineering Laboratory for High Speed Railway Construction, 68 South Shaoshan Road, Changsha 410004, China

autor

Li Jianzhon

• State Key Laboratory of Disaster Prevention in Civil Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China

autor

Hu Zhangliang

• School of Civil Engineering, Central South University, 68 South Shaoshan Road, Changsha 410075, China
• National Engineering Laboratory for High Speed Railway Construction, 68 South Shaoshan Road, Changsha 410004, China

autor

Zhu Gexi

• Beijing Xinqiao Technology Development Co., Ltd, No.8, Xitucheng Road, Beijing 100089, China

Bibliografia

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Uwagi

PL

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023)