- 摘 要
-
（1 中國十七冶集團(tuán)有限公司技術(shù)中心，馬鞍山 243000；2 安徽工業(yè)大學(xué)建筑工程學(xué)院，馬鞍山 243032）
[摘要] 以型鋼高強(qiáng)混凝土（SRHSC）梁為研究對象，結(jié)合前期關(guān)于SRHSC梁受力機(jī)理及承載能力的試驗研究成果，認(rèn)為極限狀態(tài)下的承載能力是評價梁力學(xué)性能的關(guān)鍵指標(biāo)，將損傷前后梁正截面抗彎承載力之比和斜截面抗剪承載力之比的均值作為自變量，給出了SRHSC梁損傷表征函數(shù)，并借助“預(yù)定損傷法”計算分析了截面高度、混凝土強(qiáng)度等級、配鋼率及型鋼翼緣寬度比（型鋼翼緣寬度和梁截面寬度的比值）等參數(shù)的損傷敏感度，揭示了主要設(shè)計參數(shù)對SRHSC梁損傷演化規(guī)律的影響規(guī)律。研究成果將為建立地震激勵下SRHSC框架結(jié)構(gòu)樓層損傷模型提供理論和數(shù)據(jù)支持。
[關(guān)鍵詞] 型鋼高強(qiáng)混凝土梁；設(shè)計參數(shù)；損傷敏感度；極限承載能力；損傷演化
中圖分類號：TU398+.2 文獻(xiàn)標(biāo)識碼：A 文章編號：
Damage sensitivity analysis for main design parameters of SRHSC beams
Jin Rencai1, Tao Qinglin2
(1
2 School of Civil & Architecture Engineering,
Abstract: Taking thesteel reinforced high strength concrete (SRHSC) beam as research object, and based on previous studies on experiment achievements about mechanical behavior and carrying capacity of SRHSC beam, carrying capacity is considered as key measure for evaluating SRHSC beam mechanical property under limit state, then the mean value of flexural capacity of normal section and shear capacity of inclined section ratio before and after damage is used as variables, and the damage characterization function of SRHSC beam is established finally. With the application of predetermined damage method, damage sensitivity of sectional height, concrete strength, steel ratio and flange width ratio (the ratio of steel flange width and beam width) are revealed, then the influence law of main design parameters on damage evolution of SRHSC beam is obtained. The achievements will provide theoretical support for establishing story damage model of SRHSC frame structure.
Keywords: steel reinforced high strength concrete (SRHSC) beam; design parameter; damage sensitivity analysis; ultimate carrying capacity; damage evolution
參 考 文 獻(xiàn)
[1] 陳肇元. 高強(qiáng)與高性能混凝土的發(fā)展及應(yīng)用[J]. 土木工程學(xué)報, 1997, 30(5): 3-11.
[2] 鄭山鎖, 陶清林, 王斌, 等. 型鋼高強(qiáng)混凝土梁力學(xué)性能試驗研究 [J]. 工程力學(xué), 2013, 30(11): 101-109.
[3] 陶清林. 型鋼高強(qiáng)混凝土框架結(jié)構(gòu)多尺度力學(xué)性能研究[D]. 西安: 西安建筑科技大學(xué), 2013.
[4] Newmark Nathan Mortimore. Fundamentals of earthquake engineering [M]. Prentice-Hall, 1971.
[5] Magdy S. L. Roufaiel, Christian Meyer. Analytical Modeling of Hysteretic Behavior of R/C Frames [J]. Journal of Structural Division, ASCE, 1987(113): 429-444.
[6] YOUNG JI PARK, ALFREDO H S ANG. Mechanistic seismic damage model for reinforced concrete [J]. Journal of Structural Engineering, ASCE, 1985, 111(4): 722-739.
[7] 江近仁，孫景江. 磚結(jié)構(gòu)的地震破壞模型[J]. 地震工程與工程振動, 1987, 7(1): 20-26.
[8] 王斌. 型鋼高強(qiáng)高性能混凝土構(gòu)件及其框架結(jié)構(gòu)的地震損傷研究[D]. 西安: 西安建筑科技大學(xué), 2010.
[9] 鄭山鎖, 陶清林, 李磊, 等. 型鋼高強(qiáng)高性能混凝土梁抗彎性能試驗研究[J]. 工程力學(xué), 2013, 30(3): 140-145.
[10] 鄭山鎖, 胡義, 車順利, 等. 型鋼高強(qiáng)高性能混凝土梁抗剪承載力試驗研究[J], 工程力學(xué), 2011, 28(3): 129-135.
