高分悬赏：谁有与建筑英语的相关文献，3000字左右，最好带翻译

The first phase of the project ,which was conducted at the University of Michigan, involved monotonic punching shear tests of slabs of fiber-reinforced concreted concrete 60 in.(1520mm) square and 6 in .(150mm) thick .The slabs were constructed with fibers of varying diameters, strengths, and shapes. A 1.5 percent mix of fibers by volume was created for each specimen. Of the fiber tested in the first phase , the researchers determined that a hook-shaped wire of regular strength 1.2 in.(30mm) long and 0.022in(0.55mm) in diameter, as well as a hook-shaped wire of high strength 0.015 in.(0.38mm) in diameter ,offered the highest strength and ductility . These fibers were then tested further in the second and third phases of the project.
The researchers determined that in the test specimens, the fiber-reinforced concrete needed to surround each column only to a distance equal to four times the thickness of the slab to be effective; the remainder of the slab could then be composed of standard reinforced concrete. This amount of fiber-reinforced concrete increased the amount of sway that a slab-to-column frame could experience without undergoing punching shear failure in the connections at a cost comparable to that of shear stud reinforcement, Parra-Montesinos says.
The amount of lateral movement possible in a slab-to-column connection before punching shear damage occurs is greatly affected by the gravity load present; this is typically expressed as the radio of the shear induced by the gravity loads to the punching shear capacity of the connection under the action of loads alone. According to Parra-Montesinos, without shear reinforcement, a ratio of generally associated with a roughly 1.5 percent drift capacity in the slab-to-column frame. The higher the ratio, the more likely a connection is to fail during extreme loading. During the tests carried out in the second phase, the researchers applied a 0.5 ratio, which without slab shear reinforcement would probably lead to a punching failure at a drift of roughly 1 percent. When the connection still had not failed at a 4 percent drift, the researchers increased the ratio to 0.63. “The specimen with the high-strength fiber did not fail, and the specimen with the regular-strength fibers exhibited punching at five percent drift,” says Parra-Montesinos. “The gain in drift capacity was incredible on the unidirectional displacement tests.”

该项目的第一阶段，这是进行了在美国密西根大学，所涉及的单调冲切试验砖纤维增强混凝土的具体六零英寸（一五二○毫米）广场和6个。 （ 150毫米）厚。砖建造与纤维的不同直径，长处和形状。 1 1.5 ％的混合纤维的数量已创建为每个标本。该纤维测试在第一阶段，研究人员发现，一钩异型钢丝的经常实力1.2英寸（三零毫米）长和0.022in （ 0.55毫米） ，直径，以及作为一个钩异型钢丝高强度0.015英寸（ 0.38毫米）在直径，提供了最高的强度和韧性。这些纤维，然后测试，进一步在第二和第三阶段的项目。
研究人员发现，在测试样本，纤维混凝土所需的环绕每一栏只距离等于4倍的厚度板坯才能有效;其余的板坯，便可组成的标准钢筋混凝土。这一数额的纤维增强混凝土数额增加摆动，一个板坯到柱框架结构的经验，可无须进行冲切失败的连接在一个成本比较，认为剪切种加固，帕拉-蒙特西诺斯说。
金额横向运动可能在一板，以柱连接之前，冲切损害发生是很大的影响，由重力负载目前，这是通常表示为电台的剪切诱导的重力荷载向冲切能力的连接下的行动，荷载单。根据帕拉-蒙特西诺斯，没有剪加固，一的比例，一般与约1 .5％ ，漂移的能力，在板坯到柱框架结构。较高的比例，就越有可能是连接失败在极端负荷。期间进行的试验在第二阶段，研究人员采用了0.5的比例，这没有板坯剪切钢筋可能会导致冲压失败在漂移的1 ％左右。当连接仍然没有在4 ％漂移，研究人员增加的比例，以0.63 。 “标本与高强度纤维没有失败，并且该标本与正常强度纤维展示冲床在5 ％的漂移，说： ”帕拉-蒙特西诺斯。 “增益在漂移的能力是令人难以置信的对单向位移测试” 。