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(1 中衡設(shè)計(jì)集團(tuán)股份有限公司, 蘇州 215123;2 東南大學(xué)土木工程學(xué)院, 南京 210096)
摘要: 箍筋可顯著提高混凝土構(gòu)件延性,在彈塑性分析中,合理的箍筋約束混凝土本構(gòu)模型可更真實(shí)地反映結(jié)構(gòu)的動(dòng)力響應(yīng). 已有的部分抗震性能化相關(guān)標(biāo)準(zhǔn)和規(guī)程中,給出了建議的約束混凝土本構(gòu)模型和相應(yīng)的構(gòu)件性能評(píng)價(jià)準(zhǔn)則,但由于本構(gòu)模型多樣且評(píng)價(jià)準(zhǔn)則存在差異,應(yīng)用不同方法對(duì)結(jié)構(gòu)彈塑性分析結(jié)果帶來的影響尚不明確.基于目前工程中常用的 Mander 模型、Kent-Park 模型和錢稼茹模型等約束混凝土本構(gòu),結(jié)合現(xiàn)有不同的性能評(píng)價(jià)方法展開了一系列研究. 從工程應(yīng)用角度,對(duì)比分析了不同本構(gòu)模型的適用范圍、骨架曲線差異和應(yīng)用便捷性?基于某鋼筋混凝土壓彎試件和某鋼筋混凝土框架結(jié)構(gòu),對(duì)比分析了不同模型對(duì)構(gòu)件滯回性能和結(jié)構(gòu)層間位移角等宏觀彈塑性響應(yīng)的影響,以及應(yīng)用不同評(píng)價(jià)方法對(duì)構(gòu)件性能評(píng)價(jià)結(jié)果的影響. 結(jié)論可為工程項(xiàng)目在進(jìn)行動(dòng)力彈塑性分析時(shí),如何選擇和應(yīng)用箍筋約束混凝土本構(gòu)模型,以及了解現(xiàn)有不同性能評(píng)價(jià)方法的特點(diǎn)和差異,提供良好的參考.
關(guān)鍵詞: 約束混凝土;本構(gòu)模型;彈塑性分析;滯回性能;性能評(píng)價(jià)
中圖分類號(hào):TU318 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002-848X(2022)20-0045-08
DOI:10.19701 / j.jzjg.ZJ220098
Study on the application of stirrup-confined concrete constitutive models in elastic-plastic analysis
GONG Minfeng1, YANG Dong1, ZHANG Jin1,2
(1 ARTS Group Co. , Ltd. , Suzhou 215123, China?2 School of Civil Engineering, Southeast University, Nanjing 210096, China)
Abstract: Stirrups can significantly improve the ductility of concrete members. In the elastic-plastic analysis, a reasonablestirrup-confined concrete constitutive model can reflect the dynamic response of the structure more realistically. In some ofthe existing standards and regulations for seismic performance, constitutive models of confined concrete and correspondingevaluation criteria for member performance have been recommended. However, because of the variety of constitutive modelsand evaluation criteria, the impact of using different approaches on structural elastic-plastic analysis is not yet clear. Basedon the Mander model, Kent-Park model, and Qian Jiaru model, which were widely used in engineering, a series of studieshave been carried out in combination with different existing performance evaluation methods. From the perspective ofengineering application, the scope of application, differences in skeleton curves and ease of application of differentconstitutive models were compared and analyzed. Based on a reinforced concrete beam-column specimen and a reinforcedconcrete frame structure, the effects of different models on the elasto-plastic response such as the hysteretic performance ofthe member and the displacement angle between the layers of the structure were compared and analyzed. Additionally, theeffects of employing various evaluation criteria on the performance evaluation results of the member were examined. Theconclusion can serve as a useful guide for choosing and using stirrup-confined concrete constitutive models for dynamicelastic-plastic analysis in engineering projects, as well as for comprehending the characteristics and differences amongvarious performance evaluation techniques currently in use.
Keywords:confined concrete;constitutive model;elastic-plastic analysis;hysteretic behavior;performance evaluation
∗中衡設(shè)計(jì)集團(tuán)科研項(xiàng)目(2020-S1):建筑結(jié)構(gòu)抗震性能化設(shè)計(jì)技術(shù)研究與應(yīng)用.
第一作者:龔敏鋒,碩士,高級(jí)工程師,一級(jí)注冊結(jié)構(gòu)工程師,主要從事結(jié)構(gòu)分析技術(shù)研究,Email: gongminfeng@ artsgroup. cn.
[引用本文] 龔敏鋒,楊棟,張謹(jǐn). 箍筋約束混凝土本構(gòu)模型在彈塑性分析中的應(yīng)用研究[ J]. 建筑結(jié)構(gòu),2022,52(20): 45-52, 111. GONG Minfeng, YANG Dong, ZHANG Jin. Study on the application of stirrup-confined concreteconstitutive models in elastic-plastic analysis[J]. Building Structure,2022,52(20):45-52,111.
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