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雙鋼板混凝土組合結構平面內破壞準則研究
黃城均,宋曉冰
摘 要

(上海交通大學土木工程系, 上海 200240)

[摘要]針對承受平面內薄膜內力的雙鋼板混凝土(SCS)組合單元,基于極限分析方法,重點討論了開裂后混凝土的雙軸受力性能,提出了簡潔實用的SCS組合單元平面(主)應力空間的破壞準則。通過與Varma模型的對比可知:在壓剪狀態下,根據極限分析模型計算的抗剪承載力更高;在單軸受壓狀態下,根據SCS組合單元是否配置對穿拉結體系,極限分析模型得到的單軸抗壓承載力有所不同。通過與Ozaki相關試驗結果進行對比,并利用有限元計算軟件ABAQUS驗證了極限分析模型的適用性,結果表明:極限分析模型能合理反映SCS組合單元在極限狀態時的受力行為,可以用來對SCS組合單元破壞狀態進行判斷;建立的有限元分析模型可以用來模擬SCS組合單元承受平面內薄膜內力的受力性能。

[關鍵詞]雙鋼板混凝土結構; 平面應力狀態; 極限分析; 破壞準則

中圖分類號:TU398-2文獻標識碼:A文章編號:1002-848X(2019)04-0123-06

 

Study on in-plane failure criterion of steel-concrete-steel composite structures

Huang Chengjun, Song Xiaobing

(Department of Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)

Abstract:Based on the limit analysis method, the biaxial behavior of cracked concrete was discussed in detail for steel-concrete-steel (SCS) composite element subjected to in-plane membrane internal force. A concise and practical failure criterion for plane (principal) stress space of SCS composite element was proposed. Compared with Varma model, the limit analysis model had higher shear capacity under compression-shear condition, and the limit analysis model had different uniaxial compression capacity under uniaxial compression condition according to whether SCS composite element was equipped with a tie-through system or not. The applicability of the limit analysis model was verified by comparing with the relevant test results of Ozaki and using the finite element calculation software ABAQUS. The results show that the limit analysis model can reasonably reflect the stress behavior of SCS composite element in the limit state, and can be used to judge the failure state of SCS composite element; the finite element analysis model can be used to simulate the mechanical behavior of SCS composite elements under in-plane membrane internal forces.

Keywords:steel-concrete-steel composite structure; plane stress state; limit analysis; failure criterion

 

作者簡介:黃城均,博士研究生,Email:[email protected]

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