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（1 東南大學(xué)土木工程學(xué)院  南京 210096； 2 浙江長城建設(shè)集團(tuán)  杭州 311200）
【提要】  以PVDF膜材為試驗(yàn)對(duì)象，進(jìn)行了織物膜材的單軸和雙軸拉伸的材性試驗(yàn)研究，測(cè)定和對(duì)比了試驗(yàn)?zāi)２脑趩蜗蚝碗p向應(yīng)力狀態(tài)下的彈性常數(shù)。試驗(yàn)發(fā)現(xiàn)，當(dāng)荷載在15%極限強(qiáng)度范圍內(nèi)時(shí)，膜材應(yīng)力應(yīng)變關(guān)系基本呈線性，建議膜材經(jīng)向彈性模量約取950MPa，緯向約為700MPa。另外還進(jìn)行了織物膜材在單軸拉伸狀態(tài)下的焊縫強(qiáng)度試驗(yàn)，測(cè)定和對(duì)比了不同焊接方式和寬度的焊縫強(qiáng)度，建議單面對(duì)接焊縫寬度不應(yīng)小于50mm，搭接不應(yīng)小于30mm。
【關(guān)鍵詞】  建筑織物膜材  彈性常數(shù)  單軸拉伸試驗(yàn)  雙軸拉伸試驗(yàn)  焊縫強(qiáng)度
Uniaxial and Biaxial Tensile Experimental Study on Structural Fabric Properties/Luo Bin1，Guo Zhengxing1，Zhang Shiping2，Qiu Jun1（1 Civil Engineering College，Southeast University，Nanjing 210096，China； 2 Zhejiang Great Wall Construction Group，Hangzhou 311200，China）
Abstract:The elastic constants of PVDF fabric material are determined by the uniaxial and biaxial tensile tests，and the results of uniaxial and biaxial tensile test are compared. It is indicated that the stressstrain relationship of the fabric is linear when the stress is under 15% of limit strength. It is suggested that the elastic module of the fabric should take 950MPa in longitudinal direction and 700MPa in latitudinal direction. In addition，the weld strengths of different weld width and type are determined by uniaxial tensile test. The results show that the width and the overlapped length of the butt welding on one side should not be less than 50mm and 30mm.
Keywords:structural fabric； elastic constants； uniaxial tensile test； biaxial tensile test； weld strength