拉筋

A new and applied mathematical model for the equivalent resistance based on force analysis of semi-circle drawbead is established, and a device for testing the resistance is developed.

基于半圆形拉深筋的受力分析，构建了一种新型实用的拉深筋等效约束阻力模型，并开发了一套测试拉深筋阻力的试验装置。

Based upon analysis of mechanical behaviors of annectent reinforcing bar in shell frame filled-wall present construction method of expansion bolt and annectent reinforcing bar is evaluated.

对填充墙拉结筋力学行为进行了分析，基于分析结果，对目前拉结筋膨胀螺栓施工方法进行了评价，指出目前的施工方法不能保证拉结筋对填充墙体的约束，并提出了一种改进方法。

The results show that the gabion meshes present good tensile characteristics in the event of the rupture of the meshes. The larger-diameter gabion mesh shows a better mechanical performance, and the mechanical performance of 80RE geogrid is superior to that of 70RE geogrid. The revised relationship curves between the tension per unit width and unit elongation also present elastic stage, yield stage and strength stage. The constraint deformation of reinforcement is influenced by factors such as secant modulus of materials, stress levels, and the length of reinforcement in active area and stable area.

结果表明，格宾网在发生钢丝断裂之后仍呈现出较强的抗拉性能，大直径格宾网体现出优越的力学性能；80RE土工格栅的力学性能优于70RE土工格栅；修正后的格宾网的单位宽度拉伸力与伸长率的关系曲线仍呈现弹性、屈服和强化3个阶段；在约束条件下，筋带的变形量与筋带的割线模量、应力水平、筋带在加筋体中主动区和稳定区的长度等因素有关。

While under the same anchorage conditions, the ultimate tensile stress in adhesive reinforcement of beam is much smaller than the ultimate stress in pull-out test of block specimen.

将植筋搭接梁的试验结果与块体试件植筋锚固单向拉拔试验的结果比较表明，在相同植筋条件下，梁式试件破坏时钢筋的应力远小于块体试件单向拉拔试件破坏时钢筋的应力。

Author points out that present construction method can not ensure the restraint of annectent reinforcing bar to filler wall .

对填充墙拉结筋力学行为进行了分析，基于分析结果，对目前拉结筋膨胀螺栓施工方法进行了评价，指出目前的施工方法不能保证拉结筋对填充墙体的约束，并提出了一种改进方法。

Since inextensible reinforcements do not stretch under design loading, they are the preferred MSE reinforcement type for highway structures in general and for critical structures such as bridge abutments in particular, where deformation control is crucial to structural performance of both the superstructure and the abutment.5 Inextensible reinforcements have been used successfully in MSE bridge abutment structures for thirty-five years, while research is still underway trying to develop an extensible

由于不可拉伸的加筋体在设计承载下不能拉伸变形，因此它们一般是公路结构，尤其是桥肩等重要结构中的首选材料，因为在这些结构中，变形控制对上层建筑和桥肩中性能表现是很关键的因素。不可拉伸加筋体在加筋土桥肩结构中已经成功的使用了35年，与此同时，研究能够在桥肩应用中性能有保证的可拉伸加筋体的工作正在进行中。

According to modifying effect of magnetic field to resin, through modification of FRP pultrusion process and equipments, this dissertation developed FRP rebar magnetism curing pultrusion process, studied the effect of fabrication magnetic field intensity on mechanical performances of fabricated GFRP rebar, and confined the optimal intensity of curing magnetic field. Through durability contrast test of GFRP rebars fabricated with optimal curing magnetism intensity and without magnetic field in 80℃water, according to water-absorbing capacity and interlaminate shear strength, the effect of magnetism curing on the durability performance of GFRP rebar was studied.

根据磁场对树脂的改性作用，对FRP拉挤成型工艺设备进行改进，研究开发了FRP筋磁场固化拉挤工艺；研究了成型磁场强度对成型后GFRP筋力学性能的影响，确定了最佳磁场强度；对最佳磁场强度成型和无磁场成型GFRP筋进行80℃水中的耐久性对比试验，以吸水率和层间剪切强度为指标，研究了磁场固化工艺对GFRP筋耐久性的影响。

The flexural capacity, deformation and failure modes of beams with different parameters can be analyzed using the program, such as types of plan and prestressed tendons(extrenal prestessed tendons, internal unbonded prestressed tendons, internal bonded prestressed tendons), jacking and effective stress in external prestressed tendons, configuration of the deviators, properties of tendon, ratio of span to effective depth of the beam and load pattern, initial loading state at tendon jacking, etc.(3) Nonlinear behaviors of the concrete beam prestressed with external or internal unbonded tendons were studied by the program developed.

本程序可以对任意截面型式的预应力(体外预应力筋、体内无粘结预应力筋、体内有粘结预应力筋)混凝土梁和普通钢筋混凝土梁进行非线性全过程数值分析计算，程序可以就转向块的布置方式、体外预应力筋纵断面形状、体外筋有效预应力的大小及材性、张拉预应力筋时梁的持荷状态等因素对体外预应力混凝土梁在外荷载作用下的强度、变形特征、破坏模式等的影响进行分析研究。

Adding an overhand knot at each crossover increases friction and keeps the lacing much firmer.

加入一个overhand结，在每个交叉增加摩擦和保持拉筋得多坚定。

Like a combination of Loop Back and Knotted Lacing, the laces are twisted together with a vertical overhand knot at each crossover before continuing to the other side.

就像一个结合环回和扭结拉筋， laces是扭在一起有垂直overhand结，在每个交叉，然后继续向另一边。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。