钢筋混凝土现浇板裂缝分析和粘钢加固极限承载力计算-结构工程专业论文.docxVIP

中文摘 中文摘中又}两 要要 本文根据裂缝产生原因对钢筋混凝土现浇板裂缝进行分类，针对各种 类型的裂缝对其影响因素进行分析并提出合理的防治方法和处理措施。针 刈目前钢筋混凝土现浇板设计中存在的问题提出合理地解决方法。钢筋混 凝上现浇板出现裂缝和使用功能改变时，获知其在设计荷载作用下的最大 内力值、最大裂缝宽度是板是否需要加固的依据。本文特此编制薄板弯曲 有限元程序，利用它和PM，结合有关试验对工程实例进行裂缝和内力分析， 以此推断裂缝产生原因和确定其是否需要加固。粘钢加固因其优点已在工 程中被广泛采用，但目前存在着相关理论滞后于应用的现象。本文在有关 理论、试验和结构分析的基础上提出粘钢加固后钢筋混凝土双向板的塑性 铰线模式，利用塑性铰线模式和虚功原理得出它的承载力上限值计算公式； 利用米塞斯屈服条件和静力法得出它的承载力下限值计算公式。 关键词：钢筋混凝土现浇板裂缝加固粘贴塑性铰线 AbstractIn Abstract In the paper，Based on the procreant reasons，the fracture that exists in cast—in·place reinforced concrete slabs was separated into several types．The influential factors were analyzed in allusion to every type of fracture and taken forward reasonable precaution and solution There was some question that exists in cast—in·place reinforced concrete slabs design now，the author taken forward reasonable solution in allusion to tho se．It is of nece s sary that the designers gain the max internal force value and the max width magnitude 0f fracture when the fracture was found in cast—in—Place reinforced concrete slabs or the primary function of those was changed． Consequently The author worked out the thin plate winding finite element program and gained before—mentioned things by it and PM The necessity of reinforcements was decided whether or not by those．The strengthening technique using external bonding of steel thin plate was applied widely because of its a good many advantages．But its concerned theory dropped behind its appliance to a certain extent．In the paper，the yield line pattern of strengthening cast—in—place reinforced concrete s】abs was taken forward by means of concerned theory、experimentation and structural analysis．The upper limit calculated formula of strengthening two-way square RC slabs ultimate load was gained by means of the principle of virtual work and yield line pattern．The lower limit calculated formula of strengthening two—way square RC slab ultimate load was gained by means of Mises yield term and static way． Keywo rds：cast—in—place rei nf