求帮忙翻译下（急用）（百度直接翻译粘过来就算了--）Conventional expansion joints of concrete bridge decks are needed to accommodate deck movements due to live load, temperature variations, and material shrinkage. Without expans

求帮忙翻译下（急用）（百度直接翻译粘过来就算了--）Conventional expansion joints of concrete bridge decks are needed to accommodate deck movements due to live load, temperature variations, and material shrinkage. Without expans
求帮忙翻译下（急用）（百度直接翻译粘过来就算了--）
Conventional expansion joints of concrete bridge decks are needed to accommodate deck movements due to live load, temperature variations, and material shrinkage. Without expansion joints,random cracking and crushing of the deck would result from such mechanical and environmental loading. Unfortunately expansion joints often jam, resulting in leakage of aggressive agents through the deck, causing damage on beam-ends, and requiring expensive and frequent joint maintenance. One proposed solution to this problem is the use of reinforced link-slabs. Linkslabs are designed to replace the expansion joint and surrounding concrete while still accommodating movements of the adjacent spans so that the deck becomes continuous. The link-slabs,partially debonded from the girder, then serve as hinges over the simply supported beams and connected to the adjacent concrete slabs via steel reinforcements. A shortcoming of concrete link slabs is that they require heavy steel reinforcement to control the crack width in order to maintain durability. Success in crack control is sensitive to the correct design and placement of this steel reinforcement. Large steel reinforcement ratios result in stiffening of the link-slab,contrary to the desire of a flexible hinge.

求帮忙翻译下（急用）（百度直接翻译粘过来就算了--）Conventional expansion joints of concrete bridge decks are needed to accommodate deck movements due to live load, temperature variations, and material shrinkage. Without expans
混凝土桥面需要传统的伸缩接合处,以适应由于活荷载、温度变化和材料收缩引起的桥面运动.无伸缩接合处,桥面就会因这些机械和环境的荷载而产生随机的开裂和压溃.不幸的是,伸缩接合处经常堵塞,从而导致侵蚀剂漏泄通过桥面,造成梁端损坏,并需要昂贵而频繁的接合处维护.针对这个问题的一个建议的解决方案是利用增强的链接-桥板.链接桥板被设计来取代伸缩结合处和周围的混凝土,同时仍可容纳相邻跨段的运动,从而使桥面成为连续的.链接桥板,与大梁部分脱离接合,然后对简支梁起铰链的作用,并通过钢筋增强件与相邻的混凝土桥板连接.混凝土链接桥板的一个缺点是,它们需要沉重的钢筋增强来控制裂缝宽度,以保持耐久性.裂缝控制的成功与否对这种钢筋增强的正确设计和布置关系很大.钢筋增强比率大会导致链路桥板的变硬,与希望有柔性的铰链的愿望正相反.