1、The frame structure anti- earthquake concept design The disaster has an earthquake dashing forward sending out nature, may forecast nature very low so far, bring about loss for human society is that the natural disaster of all kinds is hit by one of the gravest disaster gravely. In the light of now
2、available our country science level and economy condition, correct the target building seismic resistance having brought forward three standards fortification, be that generally, the what be spoken small earthquake shocks does not but constructs in the dirty trick, big earthquakes do not fall . That
3、 generally, what be talked small shocks in the earthquake, big earthquakes refer to respectively is intensity exceed probability in 50 fortifying for 3%s 63% , 10% , 2 being more is caught in an earthquake, earthquake , rare Yu earthquake. Since building the astigmatic design complexity, in actual p
4、roject, anti-knock conceptual design appears especially important right away. It includes the following content mainly: Architectural design should pay attention to the architectural systematic ness； Choose rational building structure system； the tensile resisting inclining force structure and the c
5、omponent is designed. That the ability designs law is the main content that the structure denasality designs includes standard our country internal force adjustment and structure two aspect. It is twenty centuries seventies later stage , reinforced concrete structure brought forward by famous New Ze
6、aland scholar T.Paulay and Park has sufficient tonsillitis method under the force designing an earthquake chooses value is prejudiced low situationW.hose core thought is: The beam cuts organization or the beam column cuts organization by the fact that the strong weak post beam guides structure to ta
7、ke form； Avoid structure by strong weak scissors turn before reach estimate that shearing happened in the denasality in the ability front destroy； Turn an ability and consume an ability by the fact that necessary structure measure makes the location may form the plasticity hinge have the necessary p
8、lasticity. Make structure have the necessary tonsillitis from all above three aspect guarantee. That framed structure is the common structure form, whose senility certainly designs that, is to embody from about this three aspect also mainly. 1, Strong pillar weak beam Driving force reaction analysis
9、 indicates structure； architectural deformability is connected with to destroying mechanism. Common have three kinds models consume energy organization , beam hinge organization “, post hinge organization “, beam column hinge organization .Beam hinge organization and beam column hinge organization L
10、ang Xian knuckle under , may let the entire frame have distribution and energy consumption heavierthan big internal forces ability, limit tier displacement is big , plasticity hinge quantity is many , the hinge does not lose efficacy but the structure entirety does not lose efficacy because of indiv
11、idual plasticity. The as a result anti-knock function is easy to be that the armored concrete is ideal consume energy organization. Being that our country norm adopts allows a pillar , the shearing force wall puts up the hinge beam column hinge scheme, taking place adopting strong relative weak post
12、 beam measure , postponing a pillar cuts time. Weak tier of post hinge organization possibility appear on unable complete trouble shooting but , require that the axis pressure restricting a pillar compares as a result, architectural weakness prevents necessary time from appearing tier by the fact th
13、at Cheng analysis law judges now and then, post hinge organization. Are that V. I. P. is to enhance the pillar bending resistance , guidance holds in the beam appear first, the plasticity cuts our strong common weak post beam adjustment measure. Before plasticity hinge appearing on structure, struct
14、ure component Yin La District concrete dehiscence and pressure area concrete mistake elasticity character, every component stiffness reduces a reinforced bar will do with the cementation degeneration between the concrete. That stiffness reduces a beam is relatively graver than accepting the pillar p
15、ressing on , structure enhances from initial shearing type deformation to curved scissors shape deformation transition , curved post inner regulation proportion really more curved than beam； The at the same time architectural period is lengthened, size affecting the participation modulus shaking a t
16、ype respectively to structures； Change happened in the earthquake force modulus , lead to the part pillar bend regulation enhancing, feasible beam reality knuckles under intensity rise , the post inner bends regulation when plasticity hinge appearing on thereby feasible beam enhancing since structur
17、e cause and the people who designs the middle reinforced bars are to enhance. And after plasticity hinge appearing on structure, same existence having above-mentioned cause, structure knuckles under mistake elasticity in the day after tomorrow process being that process , post that the earthquake en
18、hances strenuously further bend regulation enhancing with earthquake force but enhance. The force arouses an earthquake overturn force moment having changed the actual post inner axis force. We knuckle under the ability lessening than axis pressure in standardizing being limited to be able to ensure
19、 that the pillar also can lead to a pillar in big the bias voltage range inner , axis force diminution like value. The anti-knock norm is stipulated: Except that the frame top storey and post axis pressure are compared to the strut beam and frame pillar being smaller than 0.15 person and frame, post
20、 holds curved regulation designing that value should accord with difference being ， that first order takes 1.4 , the two stage takes 1.2 , grade-three takes 1.1. 9 degree and one step of framed structure still responds to coincidence, ， intensity standard value ascertains that according to matching
21、reinforced bar area and material really. The bottom post axis is strenuously big, the ability that the plasticity rotates dispatches, be that pressure collapses after avoiding a foot stall producing a hinge, one, two, three steps of framed structure bottom, post holds cross section constituting curv
22、ed regulation designing that value takes advantage of that 1.5, 1.25 compose in reply 1.15 in order to enhancing a modulus respectively. Combination of the corner post adjustment queen bends regulation still should take advantage of that not to be smaller than 1.10s modular. Curved regulation design
23、s that value carries out adjustment to one-level anti-knock grade shearing force wall limb cross section combination , force the plasticity hinge to appear to reinforce location in the wall limb bottom, the bottom reinforces location and all above layer of curved regulation designing that value take
24、s wall limb bottom cross section constituting curved regulation designing value , other location multiplies 1.2s by to enhance a modulus. Prop up anti-knock wall structure to part frame, bottom-end , whose curved combination regulation design value respond to one, two steps of frame pillars post upp
25、er end and bottom post take advantage of that 1.5 composes in reply 1.25 in order to enhancing a modulus respectively. All above strong weak post beam” adjustment measure, reaction analysis indicates , big satisfied fundamental earthquakes demand no upside down course nonlinearity driving force. Rei
26、nforced bar spending area, the beam in 7 is controlled from gravity load, the post reinforced bar matches tendon rates basically from the minimum under the control of. Have enhanced post Liana Xiang all round resisting the curved ability. At the same time, 7 degree of area exactly curved regulation
27、plasticity hinge appears on disaster very much, plays arrive at advantageous role to fighting against big earthquakes. In 9 degree of area, adopt reality to match reinforced bar area and material bending regulation within intensity standard value calculation post, structural beam reinforced bar enha
28、ncing same lead to enhancing bending regulation within post designing value, under importing in many waves, the beam holds the plasticity hinge rotating developing greatly, more sufficient, post holds the plasticity hinge developing insufficiency, rotate less. Design demand with the beam. Reaction a
29、nd 9 degree are about the same to 8 degree of area , whose big earthquake displacement , that post holds the plasticity hinge is bigger than rotating 9 degree much but, the beam holds the plasticity hinge appearing sufficient but rotate small, as a result strong weak post beam effect is not obvious
30、, curved regulation enhances a modulus ought to take 1.35 , this waits for improving and perfecting going a step further when the grade suggesting that 8 degree of two stage is anti-knock in connection with the expert. 2, Strong shear weak curved Strong weak scissors turn” is that the plasticity cut
31、s cross section for guarantee on reach anticipate that shearing happened in the mistake elastic-deformation prior to destroy. As far as common structure be concerned, main behaviors holds in the beam, post holds, the shearing force wall bottom reinforces area , shearing force wall entrance to a cave
32、 company beam tools , beam column node core area. Show mainly with being not that seismic resistance is compared with each other, strengthening measure in improving the effect shearing force； Aspect adjusting a shear bearing the weight of two forces. 1) effect shearing force One, two, three-level fr
33、ame beam and anti-knock wall middle stride over high ratio greater than 2.5 company beam, shearing force design value among them , first order choose 1.3, two stage choose 1.2, three-level choose 1.1, first order framed structure and 9 Due Shan respond to coincidence. Coincidence one, two, three steps of frame post and frame pillar , shearing force being designed being worth taking 1.4
