考慮初應(yīng)力的方鋼管混凝土柱軸壓極限承載力統(tǒng)一解*
趙均海1，封文宇1，令昀2，李艷3
- 摘 要
-
(1 長(zhǎng)安大學(xué)建筑工程學(xué)院， 西安 710061； 2 世茂房地產(chǎn)有限公司， 西安 710021； 3 長(zhǎng)安大學(xué)地質(zhì)工程與測(cè)繪學(xué)院， 西安 710054)
［摘要］采用雙剪統(tǒng)一強(qiáng)度理論，考慮鋼管初應(yīng)力、中間主應(yīng)力及材料拉壓比的影響，對(duì)方鋼管混凝土短柱的受力機(jī)理進(jìn)行分析。將核心混凝土劃分為有效約束區(qū)和非有效約束區(qū)，引入長(zhǎng)細(xì)比折減系數(shù)，建立考慮初應(yīng)力的方鋼管混凝土柱軸壓極限承載力的統(tǒng)一解。通過(guò)與試驗(yàn)結(jié)果和數(shù)值模擬結(jié)果的比對(duì)，驗(yàn)證了公式的正確性，并針對(duì)各參數(shù)的影響特性進(jìn)行討論。研究結(jié)果表明：考慮初應(yīng)力的方鋼管混凝土柱的軸壓極限承載力隨側(cè)壓系數(shù)、統(tǒng)一強(qiáng)度理論參數(shù)、考慮長(zhǎng)細(xì)比影響的穩(wěn)定系數(shù)等的增大而增大，隨初應(yīng)力、廣義寬厚比等的增大而減小。對(duì)考慮初應(yīng)力的方鋼管混凝土柱的研究有一定的參考意義。［關(guān)鍵詞］雙剪統(tǒng)一強(qiáng)度理論; 方鋼管混凝土; 初應(yīng)力; 軸壓極限承載力中圖分類號(hào)：TU398 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1002-848X(2016)04-0056-06
Unified solution of axial compression ultimate bearing capacity for concrete-filled square steel tubular column with initial stressZhao Junhai1, Feng Wenyu1, Ling Yun2, Li Yan3(1 School of Civil Engineering, Chang'an University, Xi'an 710061, China; 2 Shimao Property Holdings Limited, Xi'an 710021, China; 3 School of Geology Engineering and Geomatics, Chang'an University, Xi'an 710054, China)Abstract:Based on the twin shear unified strength theory, the mechanical behavior of concrete-filled square steel tubular (CFSST) short column was analyzed by considering influences of initial stress of steel tube, intermediate principal stress and tension-compression ratio of materials. The core concrete was divided into effective constraint region and invalid constraint region, and the unified solution of axial compression ultimate compression bearing capacity of CFSST column was established by introducing the reduction factor of slenderness ratio. Compared with the results of experiments and numerical simulations, the correctness of the proposed formula was verified. Furthermore, the effects of some parameters on the ultimate compression bearing capacity were discussed. The research results indicate that the axial compression ultimate bearing capacity of CFSST column increases with the increase of side pressure coefficient, parameter of unified strength theory and stability factor considering slenderness ratio, while it decreases with the increase of initial stress and broad width-to-thickness ratio. The results may provide reference for research of CFSST column with initial stress.Keywords:twin shear unified strength theory; concrete-filled square steel tube; initial stress; axial compression ultimate bearing capacity
*國(guó)家自然科學(xué)基金項(xiàng)目(41202191)，陜西省社會(huì)發(fā)展科技攻關(guān)項(xiàng)目（2015SF272），陜西省自然科學(xué)基礎(chǔ)研究計(jì)劃項(xiàng)目（2014JQ7290，2015JM4146）。作者簡(jiǎn)介：趙均海，教授，博士生導(dǎo)師，Email: zhaojh@chd.edu.cn。
- 下載地址
-
你還沒(méi)注冊(cè)？或者沒(méi)有登錄？這篇論文要求至少是本站的注冊(cè)會(huì)員才能閱讀！
如果你還沒(méi)注冊(cè)，請(qǐng)趕緊點(diǎn)此注冊(cè)吧！
如果你已經(jīng)注冊(cè)但還沒(méi)登錄，請(qǐng)趕緊點(diǎn)此登錄吧！
