自密实再生混凝土梁斜截面抗裂试验与计算

为了研究自密实再生混凝土梁斜截面抗裂性能,分析了混凝土种类和配箍率等因素对其斜截面抗裂性能的影响.结果表明:混凝土种类和强度对自密实再生混凝土梁破坏形态无影响,而配箍率和剪跨比影响梁破坏形态;自密实再生混凝土梁剪切耗能能力较普通混凝土梁好,且工作荷载下自密实再生混凝土梁斜裂缝宽度要小于普通混凝土梁;提高剪跨比和降低混凝土强度均可减小斜截面开裂荷载,而混凝土种类和配箍率对梁斜截面开裂荷载无影响.

Test of market response to qualified audit opinion

With the multivariate regression analysis,the stock market responses are studied to qualified audit opinions in the 2003 Chinese stock markets.After the factors of earnings and dividend policies are considered,there are significant differences among the market responses between qualified audit reports and unqualified ones,and there are significant differences among the responses between unqualified audit reports and the reports with reserved opinions or with unexpressed opinions,around the dates of audit report disclosure.The differences are not significant among the responses among audit reports with emphatic paragraph with or without reserved opinions.