In earthquake area , many engineers used concrete structure with unbonded tendons . but people still has lots of different opinions about its seismic behaviors 无粘结预应力混凝土结构在地震设防区域的应用越来越广泛，但对其抗震性能的认识存在较大的分歧。
However , for it ' s late that the unbonded prestressed structures are applied in fujian , so the level is low and the range of appliance is narrow 况且福建省在推广应用无粘结预应力混凝土结构方面起步较晚，因此预应力技术水平还不很高，应用工程面积还不够多，不够广。
This product is mainly used for reinforcement of pre - stressed concrete structures such as wide span bridges , frames of multi - story industrial buildings , rock - soil anchoring , wide span floor slabs , etc 本产品主要用于预应力混凝土结构配筋。如大跨度桥梁、多层工业厂房框架、岩土锚固、大跨度楼板等。
Abstract : this thesisdiscusses the significance and recent situations of prestressed concrete structure withtension and compression prestress and proposes research contents , research methods and thegoal to be achieved 文摘:论述拉?压预应力混凝土结构的使用意义及目前的状况,提出研究内容、研究方法及达到的目标。
This product is mainly used for reinforcing various pre - stressed concrete structures such as large bridges , crane girders , cement power poles , pre - stressed concrete pipes , frames of multi - story factory buildings , etc 本品主要用于各种预应力混凝土结构的配筋。如大型桥梁、吊车梁、水泥电杆、预应力混凝土水泥管、多层厂房框架等。
The product is mainly used as auxiliary reinforeing strand for concrete structure . e . g long spanned bridge s on railway and highway , overhead crane beam , rock and earth anchoring construction muiti - floor industrial building and etc 该产品主要作预应力混凝土结构配筋用，如大跨度铁路和公路的桥梁、吊车梁、岩土锚固工程，多层工业厂房等。
This thesis sums up the study of the rc flat - beam frame structure , the pc frame structure , the steel - fiber concrete , the performance of the steel - fiber concrete and its influence to the seismic resistance of the frame 本文总结了国内外对钢筋混凝土扁梁框架结构、预应力混凝土结构和钢纤维混凝土的研究，概括了钢纤维混凝土的性能及其对框架抗震性能的影响。
The reinforcement scheme and method were useful to design large - span three - dimention stress prestressed concrete bridge , cohensiveless prestressed concrete structure , and provided a lot of theoretical criterions for the strengthenment of existing fault bridges 为合理地设计大跨度三向预应力混凝土桥梁结构、无粘结预应力混凝土结构及既有桥梁的加固提供了理论依据。
Unbounded partially prestressed reinforced ( ppc ) structure is a new form of reinforced concrete ( rc ) structure 5which need not set ducts , install tendons and grout in advance , so it is more convenient and quicken the rate of progress 无粘结部分预应力混凝土结构是一种新型的加筋混凝土结构形成，它不需要预留孔道、穿筋、灌浆等复杂工序，简便操作，加快了施工进度。
Only to do mis , the value of prestressed force is designed suitable , the capability that the prestressed concrete structure bears weight , security , and dependability , economy and service life of the structure can be convinced 只有准确地估计长索预应力损失大小，才能合理地进行结构预应力设计，保证预应力混凝土结构的承载能力，确保桥梁结构的安全性、可靠性、经济性和使用寿命。
