【作者】 杨林虎；

【导师】 朱涵；

【作者基本信息】 天津大学 ， 结构工程， 2007， 硕士

【摘要】 橡胶集料混凝土作为一种新型节能环保的混凝土材料,因其具有良好的工程性能如弹性模量低、低脆性、抗裂性能好、阻尼系数高等,受到建筑工程领域的广泛关注。橡胶集料混凝土在组成上最大的特点是引入了一种新的材料-橡胶集料作为其第三骨料成分。一方面,橡胶集料的掺入明显改善了混凝土的脆性,从某种意义上说打破了传统上认为混凝土为脆性材料的认识。另一方面,同样是由于橡胶集料的加入,改变了橡胶集料钢筋混凝土梁的延性性能。本文采用脆性系数作为橡胶集料混凝土脆性的评价指标,其定义为混凝土抗压强度与抗折强度的比值,脆性系数越小,则混凝土的脆性越低。通过实验研究了橡胶集料混凝土在不同温度环境下的脆性特征。同样,本文采用延性系数作为橡胶集料钢筋混凝土梁延性的评价指标,其定义为梁截面的极限曲率和屈服曲率的比值。对于橡胶集料混凝土梁截面的延性系数本文仅作了初步的理论分析,实验方面的研究尚未展开。在理论分析的基础上计算出了不同截面特征梁截面的延性系数,同时,对相同荷载作用下的双筋截面橡胶集料混凝土梁进行了配筋分析。鉴于2005年11月,在青(青岛)银(银川)高速公路河北石家庄段入口处建造的世界上第一块橡胶集料混凝土路面实验段取得成功,以及橡胶集料混凝土各方面更卓越的工程特性,我们进行了进一步的探讨,讨论橡胶集料混凝土在桥面铺装层上应用的可行性,并于2006年8月在天津市武清区武香路的二百户东口桥,铺筑了橡胶集料混凝土桥面铺装层的实验段。更多还原

【Abstract】 As a new kind of concrete material of energy-saving and environment protecting, Crumb of Rubber Concrete (CRC) is paid broad attention to by people of architectural circle because of its good engineering performance such as lower Young’s modulus, lower brittleness, perfect ability of holding back crack and high damp modulus. CRC has a new kind of material-rubber crumb in it as its third bone component which is the most distinct trait of it in composing. One hand, the brittleness of concrete has improved obviously because of the joint of rubber crumb, by which the traditional viewpoint of regarding concrete as brittle has been broken. On the other hand, the ductility of Reinforced Crumb Rubber Concrete (RCRC) beam has also improved greatly just because of the same reason.Brittleness modulus has been adopted to measure the brittleness of CRC, which is defined as the ratio of compressive strength to bending strength of CRC. The smaller the brittleness modulus was, the lower brittleness of the concrete was. And the brittleness of CRC has been studied though experiments in different temperature environment.Also, ductility modulus has been adopted to measure the ductility of RCRC beam, which was defined as the ratio of ultimate curvature of section to subdued curvature of section of RCRC beam. In this paper, the study of the ductility modulus of RCRC beam has been carried out initially in theory, and the experimental study haven’t been carried out yet. A series of ductility modulus of sections with different trait have been calculated based on the academic analysis above, while, the steel analysis of double–steel section of RCRC beam has also been carried out under the same load.With the fact that the first experimental section which is located at the entrance of Shi Jiazhuang in HeBei province in Qing-Yin Highway was paved with CRC successfully in November, 2005 and the variety of advantages in engineering performance of CRC, we studied further, analyzed the feasibility of the application to cover layers of bridges. and the experimental section with CRC applied to cover layers of bridges has been paved on the Dongkou Bridge of 200 doors in the Wuxiang Road in Wuqing District of Tian Jin in August, 2006更多还原