范文工地进程梁范文计算方案

时间：2021-04-05 18:07:19 来源：蒲公英阅读网 本文已影响人

相关热词搜索：工地 进程 方案

模板工地进程梁模板计算方案 本文关键词：模板，工地，进程，方案，计算

模板工地进程梁模板计算方案 本文简介：柱模板（设置对拉螺栓）计算书一、工程属性新浇混凝土柱名称A楼3层KL11新浇混凝土柱长边边长(mm)1000新浇混凝土柱的计算高度(mm)3000新浇混凝土柱短边边长(mm)1000二、荷载组合混凝土重力密度γc(kN/m3)24新浇混凝土初凝时间t0(h)4外加剂影响修正系数β11混凝土坍落度影响

模板工地进程梁模板计算方案 本文内容：

柱模板（设置对拉螺栓）计算书

一、工程属性

新浇混凝土柱名称

A楼3层KL11

新浇混凝土柱长边边长(mm)

1000

新浇混凝土柱的计算高度(mm)

3000

新浇混凝土柱短边边长(mm)

1000

二、荷载组合

混凝土重力密度γc(kN/m3)

24

新浇混凝土初凝时间t0(h)

4

外加剂影响修正系数β1

1

混凝土坍落度影响修正系数β2

1.15

混凝土浇筑速度V(m/h)

2.5

混凝土侧压力计算位置处至新浇混凝土顶面总高度H(m)

2

倾倒混凝土时对垂直面模板荷载标准值Q3k(kN/m2)

2

新浇混凝土对模板的侧压力标准值G4k＝min[0.22γct0β1β2v1/2，γcH]＝min[0.22×24×4×1×1.15×2.51/2，24×2]＝min[38.4，48]＝38.4kN/m2

承载能力极限状态设计值S承＝0.9max[1.2G4k+1.4Q3k，1.35G4k+1.4×0.7Q3k]＝0.9max[1.2×38.4+1.4×2，1.35×38.4+1.4×0.7×2]＝0.9max[48.88，53.8]＝0.9×53.8＝48.42kN/m2

正常使用极限状态设计值S正＝G4k＝38.4

kN/m2

三、面板验算

面板类型

覆面木胶合板

面板厚度(mm)

15

面板抗弯强度设计值[f](N/mm2)

15

面板弹性模量E(N/mm2)

10000

柱长边小梁根数

5

柱短边小梁根数

5

柱箍间距l1(mm)

500

模板设计平面图

1、强度验算

最不利受力状态如下图，按四等跨连续梁验算

静载线荷载q1＝0.9×1.35bG4k＝0.9×1.35×0.5×38.4＝23.33kN/m

活载线荷载q2＝0.9×1.4×0.7bQ3k＝0.9×1.4×0.7×0.5×2＝0.88kN/m

Mmax＝-0.107q1l2-0.121q2l2＝-0.107×23.33×0.252-0.121×0.88×0.252＝-0.16kN·m

σ＝Mmax/W＝0.16×106/(1/6×500×152)＝8.68N/mm2≤[f]＝15N/mm2

满足要求！

2、挠度验算

作用线荷载q＝bS正＝0.5×38.4＝19.2kN/m

ν＝0.632ql4/(100EI)＝0.63×19.2×2504/(100×10000×(1/12×500×153))＝0.34mm≤[ν]＝l/400＝250/400＝0.62mm

满足要求！

四、小梁验算

小梁类型

角钢

小梁材质规格(mm)

∟80×35×3

小梁截面惯性矩I(cm4)

22.49

小梁截面抵抗矩W(cm3)

4.17

小梁抗弯强度设计值[f](N/mm2)

205

小梁弹性模量E(N/mm2)

206000

最低处柱箍离楼面距离(mm)

200

1、强度验算

小梁上作用线荷载q＝bS承＝0.25×48.42＝12.1

kN/m

小梁弯矩图(kN·m)

Mmax＝0.54kN·m

σ＝Mmax/W＝0.54×106/4.17×103＝130.58N/mm2≤[f]＝205N/mm2

满足要求！

2、挠度验算

小梁上作用线荷载q＝bS正＝0.25×38.4＝9.6

kN/m

面板变形图(mm)

ν＝0.43mm≤[ν]＝1.5mm

满足要求！

五、柱箍验算

（规范中缺少相关计算说明，仅供参考）

柱箍类型

槽钢

柱箍合并根数

1

柱箍材质规格

8号槽钢

柱箍截面惯性矩I(cm4)

101.3

柱箍截面抵抗矩W(cm3)

25.3

柱箍抗弯强度设计值[f](N/mm2)

205

柱箍弹性模量E(N/mm2)

206000

模板设计立面图

1、柱箍强度验算

长边柱箍计算简图

长边柱箍弯矩图(kN·m)

长边柱箍剪力图(kN)

M1＝0.41kN·m，N1＝12.05kN

短边柱箍计算简图

短边柱箍弯矩图(kN·m)

短边柱箍剪力图(kN)

M2＝0.41kN·m，N2＝12.05kN

M/Wn＝0.41×106/(25.3×103)＝16.18N/mm2≤[f]＝205N/mm2

满足要求！

2、柱箍挠度验算

长边柱箍计算简图

长边柱箍变形图(mm)

短边柱箍计算简图

短边柱箍变形图(mm)

ν1＝0.01mm≤[ν]＝l/400＝0.99mm

ν2＝0.01mm≤[ν]＝l/400＝0.99mm

满足要求！

六、对拉螺栓验算

对拉螺栓型号

M14

轴向拉力设计值Ntb(kN)

17.8

扣件类型

3形26型

扣件容许荷载(kN)

26

N＝12.05×1=12.05kN≤Ntb＝17.8kN

满足要求！

N＝12.05×1=12.05kN≤26kN

满足要求！

篇2：备战20XX年高考英语书面表达万能模板10求职信

备战2018年高考英语书面表达万能模板10求职信 本文关键词：年高，求职信，英语，备战，万能

备战2018年高考英语书面表达万能模板10求职信 本文简介：10求职信模板①Dear,Iwritethislettertoapplyforthepositionthatyouadvertisedinof______________________.NotonlydoIhavethequalificationsforthisjob,butIalsohaveth

备战2018年高考英语书面表达万能模板10求职信 本文内容：

10

求职信

模板①

Dear,I

write

this

letter

to

apply

for

the

position

that

you

advertised

in

of

______________________.

Not

only

do

I

have

the

qualifications

for

this

job,but

I

also

have

the

right

personality

for

_____________________.（表明自己可以胜任某一职位）For

one

thing,.

_____________________（胜任的理由一）For

another,.

_____________________（胜任的理由二）Should

you

grant

me

a

personal

interview,I

would

be

most

grateful.

Please

contact

me

at

any

time

at.

_____________________（提供个人联系方式）

Thank

you

for

considering

my

application,and

I’m

looking

forward

to

meeting

you.（结束语，表达感谢和期望）

Yours

sincerely,Li

Hua

模板②

Dear

Sir

or

Madam,I

write

this

letter

to

apply

for

the

position

that

you

have

advertised

in_

_____________________

(报纸名

称)of

______________________(广告发布时间).

Not

only

do

I

have

the

qualifications

for

this

job,but

I

also

have

the

right

personality

for

a

_____________（工作名称）.

On

the

one

hand,_________________________(第一个原

因).

On

the

other

hand,____________________________(另一个原因).

Should

you

grant

me

a

personal

interview,I

would

be

most

grateful.

If

you

need

to

know

more

about

me,please

feel

free

to

contact

me

at

any

time

at

_______________(电话号码)

Thank

you

for

considering

my

application,and

I

am

looking

forward

to

meeting

you.

Yours

sincerely

Li

Ming

第一段开头：写信的目的（purpose）

1.

I

learned

from

your

advertisement

that

you

are

in

need

of

a

…

2.

I

saw

from

your

advertisement

in

yesterday’s

China

Daily

that

…

3.

Having

known

that

your

office

needs

a

…

I

would

like

to

apply

for

the

post.

4.

I’m

interested

in

the

post

which

you

advertised

in

yesterday’s

China

Daily.

5.

I’m

looking

for

a

job

as

a…and

would

be

grateful

if

you

would

consider

me

for

such

a

post

in

your

firm.

6.

I’ve

learnt

from

your

ad

that

your

company

needs

an

engineer.

I’m

writing

to

apply

for

the

job.

7.

I

am

writing

this

letter

to

apply

for

the

position

of

.

advertized

in

the

newspaper.

8.

I

read

from

the

newspaper

that

.

is

needed

in

your

company.

9.

learning

from

.

that

you

are

looking

for

a

.,I

would

apply

for

the

position.

第二段：自我介绍

（self-introduction）

1.

I’m

good

at./

I

do

well

in./

I

master.

well

2.

I

have

a

good

knowledge

of./

I

have

the

ability

to.

3.

I

have

a

good

command

of.

4.

I’ll

be

fit

for

the

job.

5.

I’ll

get

on

very

well

with

my

fellow

workers.

6.

Once

I’m

hired,I’ll

devote

myself

to

the

cause

of

the.

7.

I

feel

I

am

well

qualified

to

.

for

the

following

reasons.

8.

I

graduated

from.

9.

I

am

majoring

in.

/

My

major

is.

10.

I

am

experienced

in.

工作经历的常用句型：（work

experiences）

1.I

once

worked

as

a

.for

two

years

2.I

was

working

as

a

.

during

the

period

of

3.

In

2000

I

worked

4.I’ve

had

the

experience

of.

5.I’ve

been.

since.

能力：

1.

I

have

learned

English

for

8

years.

I

am

very

good

at

English,so

I

have

been

an

editor

of

my

school

s

English

Paper

in

the

past

two

years.

2.

I’m

an

excellent

student,among

the

top

5

in

my

class

of

50

students.

My

grades

are

among

the

best

ones

in

my

department.

3.

I

enjoy

working

with

people.

I’m

young

and

healthy,delightful,helpful.

I

can

speak

standard

Chinese

and

I’m

good

at

English.

I

once

won

the

first

prize

of

English

competition

in

our

college.

I’m

very

interested

in

traveling

and

know

many

places

of

interest

in

China.

4.

I

am

familiar

with

computer

operation

and

office

softwares,第三段：结尾：

1.I

will

appreciate

it

very

much

if

you

would

give

me

the

opportunity.

Thank

you

for

your

consideration.

I

am

looking

forward

to

receiving

your

reply.

2.

I

believe

that

both

my

education

and

experience

are

directly

related

to

your

requirements.

I

would

be

grateful

if

you

consider

employing

me.

3.If

I

could

have

the

opportunity

to

get

the

job

I

will

be

quite

appreciative.

Thank

you

for

your

consideration.

I

look

forward

to

hearing

from

you

4.I

think

I’m

suited

for

the

job.

If

you

can

let

me

have

this

chance

I

will

try

my

best

to

do

it

well.

Expecting

you

answer.

You

can

connect

me

by

posting

a

letter

to

No

4

Middle

School

of

Zhuzhou

or

dial

this

number:0733-8483628.

5.I

will

be

quite

appreciative

if

I

am

offered

the

opportunity.

Thank

you

for

your

consideration.

I

wish

to

get

your

answer

soon.

6.

I

would

appreciate

your

call

at

.

I

will

be

available

for

an

interview

at

your

convenience.

once

I

am

hired,I

will

work

hard

for

your

company.

7.

I

hope

my

application

will

be

taken

into

consideration.

Thank

you

for

your

consideration.

典例

假设你是李华，你校广播站正在招收英文编辑，请你根据以下提示，向负责此事的外教Mr.

Mark

申请这一职位。要点包括：

职位要求

1.有很强的英语表达能力；

2.关心时事。

个人优势

1.有做记者的经历,沟通能力强；

2.父亲是一位专职编辑,深受其影响；

3.……

注意：

1.词数100左右；

2.可适当增加细节，以使行文连贯。

____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

【范本赏析】

Dear

Mr.

Mark,I’m

writing

to

apply

for

an

English

editor

of

our

school

broadcasting

station.

I’m

qualified

for

the

position

for

the

following

reasons.

First,I

have

a

good

command

of

English

communication

skills

and

take

great

interest

in

journalism.

Second,I

was

a

part-time

reporter

in

junior

middle

school,which

developed

my

communication

and

interpersonal

skills.

In

addition,my

father

is

a

professional

editor,by

whom

I

was

deeply

influenced

and

from

whom

I

learned

a

lot.

I

really

hope

I

will

be

one

of

you.

Looking

forward

to

hearing

from

you

soon.

Yours

sincerely,Li

Hua

亮点点击

所给范本主题明确，结构完整。重点突出，详略得当。语言正式、得体、准确、流畅、地道，词汇与句式高级，摈弃铅华但不失文采。关联词语运用得恰到好处，使整个语篇衔接紧密，逻辑清楚。难能可贵的是，复杂结构和高级词汇的运用为短文增彩不少。

关联词语：first，second(排序信号词)；in

addition(附加信号词)等。

亮点词组：be

qualified

for而非be

suitable

for；have

a

good

command

of

而非be

good

at；take

great

interest

in

而非

be

very

interested

in等。

高级句式：which引导的非限制性定语从句；by

whom.

and

from

whom.

(定语从句连用)等。

Writting1

假如你是李伟，即将从中国传媒大学外语系毕业，想进入一家广播公司担任国际广播节目的主持人，你需要写一封英语求职信。

注意：

1.语言通顺，思路清晰；

2.词数100左右；

3.不得使用真实姓名及学校名称。

____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

【范本】

Dear

Sir

or

Madam,I’m

Li

Wei,a

student

from

Communication

University

of

China.

This

year,I

will

graduate

from

the

Foreign

Language

Department

and

hope

to

work

as

a

host

for

international

broadcasting

program.

I

think

that

I

can

do

this

job

well

for

the

following

three

reasons.

Firstly,I’m

good

at

both

Chinese

and

English.

I

can

speak

Chinese

and

English

correctly

and

fluently.

Then,I

once

worked

in

an

American

broadcasting

station,so

I

have

some

experience

in

working

as

a

host.

Last

but

not

least,I

love

this

job,and

I

can

work

energetically

and

creatively.

Therefore,I

think

if

I’m

given

this

job,I

will

be

a

good

host.

I

hope

you

can

believe

me,and

give

me

this

chance.

I’m

looking

forward

to

your

reply

soon.

Thank

you!

Yours

sincerely,Li

Wei

Writing

2

假如你是Mary，在报纸上看到一则招聘售货员的广告，你觉得这个工作很适合你，于是决定写一封应聘信。

内容：

1.信息的来源及你的想法；

2.自我介绍；

3.你的设想或计划。

注意:

1.语言通顺；

2.可适当增加细节，以使行文连贯；

3.词数100左右，开头和结尾已给出，不计入总词数；

4.不得使用真实姓名或学校名称。

Dear

Mr.

Smith,My

name

is

Mary.

I’m

very

glad

to

write

to

you.

________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

I

hope

to

get

your

reply

soon.

Thank

you!

Yours

sincerely,Mary

Writing

3

假设你是李华，刚刚高中毕业，想利用暑假在国外找一份工作，通过这项工作来锻炼自己和提高自己的英语水平。碰巧你在一个网站上看到这样一则招聘广告，你非常感兴趣。请你按照以下提示给Black夫妇写一封求职信，信的内容应包括以下信息：

1.你想应聘这份工作及你的应聘条件；

2.进一步询问有关这份假期工作的详细信息。

HOLIDAY

JOBS!

Want

to

improve

your

English?

Want

to

spend

some

time

abroad?

Short

of

cash?

Why

not

come

and

work

for

us

on

Home

Farm?

You’ll

be

picking

fruit

and

generally

helping

out

with

all

the

usual

farm

work.

We’ll

pay

you

by

the

hour,so

the

harder

you

work,the

more

you’ll

earn!

We’ll

provide

a

place

to

sleep

and

all

your

meals.

Interested?

Why

not

drop

us

a

line

(and

a

photo)?

We’ll

be

happy

to

answer

any

queries.

Mr.

and

Mrs.

Black,Cold

Comfort

Farm,Sussex,Great

Britain

注意：

1.开头和结尾已经写好，不计入总词数；

2.词数100左右。

Dear

Mr.

and

Mrs.

Black,I

saw

your

advertisement

on

the

Internet

and

___________________________________________________

________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

I

look

forward

to

hearing

from

you

soon.

Yours

sincerely,Li

Hua

【答案】

Dear

Mr.

and

Mrs.

Black,I

saw

your

advertisement

on

the

Internet

and

I’m

very

interested

in

working

on

your

farm.

I

have

just

graduated

from

senior

high

school

and

I

need

more

practice

with

my

English.

I

hope

to

go

to

Great

Britain

but

don’t

want

to

ask

my

parents

for

money.

So

working

for

you

would

be

an

ideal

solution.

I’m

18

and

very

fit.

Although

I’ve

never

worked

on

a

farm

before,I

have

helped

on

a

building

site

and

am

used

to

working

hard.

I’m

very

fond

of

animals

and

would

be

happy

to

help

out

with

the

cows

and

sheep

if

needed.

Could

you

please

let

me

know

how

long

you

would

want

me

for,and

what

the

minimum

wages

per

hour

would

be?

I’d

like

to

know

where

I’ll

be

sleeping.

I

look

forward

to

hearing

from

you

soon.

Yours

sincerely,Li

Hua

Writing

4

假如你是李华，大学已毕业，正在找工作。《中国日报》刊登了一则某公司招聘职员的启事，你认为自己很适合该公司的招聘职位，于是你向该公司发送了一封e-mail求职。内容如下：

1.出生于湖北省，22岁，身体健康；

2.毕业于武汉大学，其专业为计算机科学；

3.擅长使用电脑与说英语；

4.业余爱好是打篮球；

5.请回复e-mail至:

lihuasina.com。

注意：

1.词数：100左右；

2.可适当增加细节，以使行文连贯；

3.开头和结尾已给出，不计入总词数。

July

20

Dear

Mr

Brown,________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Yours

truly,Li

Hua

【范本】

July

20

Dear

Mr

Brown,I’ve

learned

from

China

Daily

that

some

clerks

are

wanted

in

your

company.

I’m

eager

to

be

one

of

them.

So

I’m

writing

this

letter.

My

name

is

Li

Hua.

I’m

22

years

old.

I

was

born

in

Hubei

Province

and

I

am

in

good

health.

I

graduated

from

Wuhan

University,and

I

majored

in

computer

science.

I’ve

done

very

well

in

all

subjects

and

I’m

especially

good

at

using

computers

and

speaking

English.

And

in

my

spare

time,I

like

to

play

basketball

very

much.

If

you

are

interested

in

my

application,please

write

to

me.

My

e-mail

address

is

lihuasina.com.

I’m

looking

forward

to

hearing

from

you

soon.

With

best

wishes.

Yours

truly,Li

Hua

篇3：梁板模板支设方案

梁板模板支设方案 本文关键词：模板，方案

梁板模板支设方案 本文简介：悬挑4．2M梁板施工模板支撑方案一、现场平面图二、施工方法：16层及17层悬挑梁板施工支撑采用悬挑水平钢梁采用20a号工字钢，其中建筑物外悬挑段长度5.10米，建筑物内锚固段长度6.90米。悬挑水平钢梁上面的联梁采用[16a号槽钢U口水平，相邻悬挑钢梁之间的联梁上最多布置1根立杆。悬挑水平钢梁采用拉

梁板模板支设方案 本文内容：

悬挑4．2M梁板施工模板支撑方案

一、现场平面图

二、施工方法：

16层及17层悬挑梁板施工支撑采用悬挑水平钢梁采用20a号工字钢，其中建筑物外悬挑段长度5.10米，建筑物内锚固段长度6.90米。

悬挑水平钢梁上面的联梁采用[16a号槽钢U口水平，相邻悬挑钢梁之间的联梁上最多布置1根立杆。

悬挑水平钢梁采用拉杆与建筑物拉结，最外面支点距离建筑物3.75m。拉杆采用6×19+1钢丝绳。

如下图：

支撑平面图

三、悬挑水平钢梁计算

悬挑水平钢梁采用20a号工字钢，其中建筑物外悬挑段长度5.10米，建筑物内锚固段长度6.90米。

悬挑水平钢梁上面的联梁采用[16a号槽钢U口水平，相邻悬挑钢梁之间的联梁上最多布置1根立杆。

悬挑水平钢梁采用拉杆与建筑物拉结，最外面支点距离建筑物3.75m。拉杆采用6×19+1钢丝绳。

梁及相联板.荷载的计算：

(1)钢筋混凝土梁自重(kN/m)：

q1

=

25.000×1.150×1.000=28.750kN/m

(2)模板的自重线荷载(kN/m)q2

=

0.500×1.000×(2×1.150+0.500)/0.500=2.800kN/m

(3)活荷载为施工荷载标准值与振捣混凝土时产生的荷载(kN)：经计算得到，活荷载标准值

P1

=

(3.000+4.000)×0.500×1.000=3.500kN考虑0.9的结构重要系数，均布荷载

q

=

0.9×(1.20×28.750+1.20×2.800)=34.074kN/m_w

脚手架钢管的自重

N2

=

0.9×1.20×0.128×3.750=0.517kN__

合计:34.5

kN/m2

联梁的计算

按照集中荷载作用下的简支梁计算

集中荷载P传递力，P=25.65kN

计算简图如下

支撑按照简支梁的计算公式

其中

n=1.00/1.00=1

经过简支梁的计算得到

支座反力(考虑到支撑的自重)

RA

=

RB=(1-1)/2×25.65+25.65+1.00×0.17/2=25.73kN

通过传递到支座的最大力为(考虑到支撑的自重)

2×0.00+25.65+1.00×0.17=25.82kN

最大弯矩(考虑到支撑的自重)

Mmax=(1×1-1)/(8×1)×25.65×1.00+0.17×1.00×1.00/8=0.02kN.m

抗弯计算强度

f=0.02×106/108300.0=0.20N/mm2

水平支撑梁的抗弯计算强度小于215.0N/mm2,满足要求!

悬挑梁的受力计算

悬挑脚手架的水平钢梁按照带悬臂的连续梁计算。

悬臂部分脚手架荷载N的作用，里端B为与楼板的锚固点，A为墙支点。

脚手架排距为1000mm，内侧脚手架距离墙体200mm，支拉斜杆的支点距离墙体

=

3750mm。

水平支撑梁的截面惯性矩I

=

2370.00cm4，截面抵抗矩W

=

237.00cm3，截面积A

=

35.50cm2。

受脚手架作用的联梁传递集中力

N=25.82kN

水平钢梁自重荷载

q=1.2×35.50×0.0001×7.85×10=0.33kN/m

悬挑脚手架示意图

悬挑脚手架计算简图

经过连续梁的计算得到

悬挑脚手架支撑梁剪力图(kN)

悬挑脚手架支撑梁弯矩图(kN.m)

悬挑脚手架支撑梁变形图(mm)

各支座对支撑梁的支撑反力由左至右分别为

R1=8.266kN,R2=47.544kN,R3=-0.162kN

最大弯矩

Mmax=18.665kN.m

抗弯计算强度

f=M/1.05W+N/A=18.665×106/(1.05×237000.0)+7.381×1000/3550.0=77.082N/mm2

水平支撑梁的抗弯计算强度小于215.0N/mm2,满足要求!

悬挑梁的整体稳定性计算

水平钢梁采用20a号工字钢,计算公式如下

其中

b

——

均匀弯曲的受弯构件整体稳定系数，查表《钢结构设计规范》(GB50017-2003)附录B得到：

b=1.07

由于

b大于0.6，按照《钢结构设计规范》(GB50017-2003)附录B其值

b

=1.07-0.282/

b=0.806

经过计算得到强度

=18.67×106/(0.806×237000.00)=97.73N/mm2；

水平钢梁的稳定性计算

<

[f],满足要求!

拉杆的受力计算

水平钢梁的轴力RAH和拉钢绳的轴力RUi按照下面计算

其中RUicos

i为钢绳的拉力对水平杆产生的轴压力。

各支点的支撑力

RCi=RUisin

i

按照以上公式计算得到由左至右各钢绳拉力分别为

RU1=11.082kN

拉杆的强度计算

拉绳或拉杆的轴力RU我们均取最大值进行计算，为RU=11.082kN

拉绳的强度计算：

如果上面采用钢丝绳，钢丝绳的容许拉力按照下式计算：

其中[Fg]

——

钢丝绳的容许拉力(kN)；

Fg

——

钢丝绳的钢丝破断拉力总和(kN)；

钢丝绳之间的荷载不均匀系数，对6×19、6×37、6×61钢丝绳分别取0.85、0.82和0.8；

K

——

钢丝绳使用安全系数。

选择拉钢丝绳的破断拉力要大于1.750×11.082/0.850=22.815kN。

选择6×19+1钢丝绳，钢丝绳公称抗拉强度1400MPa，直径7.7mm。

钢丝拉绳的吊环强度计算：

钢丝拉绳的轴力RU我们均取最大值进行计算作为吊环的拉力N，为

N=RU=11.082kN

钢丝拉绳的吊环强度计算公式为

其中

[f]

为吊环抗拉强度，取[f]

=

50N/mm2，每个吊环按照两个截面计算；

所需要的钢丝拉绳的吊环最小直径

D=[11082×4/(3.1416×50×2)]1/2=12mm

锚固段与楼板连接的计算

水平钢梁与楼板压点如果采用钢筋拉环，拉环强度计算如下：

水平钢梁与楼板压点的拉环受力R=47.544kN

水平钢梁与楼板压点的拉环强度计算公式为

其中[f]为拉环钢筋抗拉强度，每个拉环按照两个截面计算，按照《混凝土结构设计规范》10.9.8[f]

=

50N/mm2；

所需要的水平钢梁与楼板压点的拉环最小直径

D=[47544×4/(3.1416×50×2)]1/2=25mm

水平钢梁与楼板压点的拉环一定要压在楼板下层钢筋下面，并要保证两侧30cm以上搭接长度。

2.水平钢梁与楼板压点如果采用螺栓，螺栓粘结力锚固强度计算如下：

锚固深度计算公式

其中

N

——

锚固力，即作用于楼板螺栓的轴向拉力，N

=

47.54kN；

d

——

楼板螺栓的直径，d

=

20mm；

[fb]

——

楼板螺栓与混凝土的容许粘接强度，计算中取1.5N/mm2；

h

——

楼板螺栓在混凝土楼板内的锚固深度，经过计算得到

h

要大于47543.52/(3.1416×20×1.5)=504.5mm。

3.水平钢梁与楼板压点如果采用螺栓，混凝土局部承压计算如下：

混凝土局部承压的螺栓拉力要满足公式

其中

N

——

锚固力，即作用于楼板螺栓的轴向拉力，N

=

47.54kN；

d

——

楼板螺栓的直径，d

=

20mm；

b

——

楼板内的螺栓锚板边长，b=5d=100mm；

fcc

——

混凝土的局部挤压强度设计值，计算中取0.95fc=13.59N/mm2；

经过计算得到公式右边等于131.6kN

楼板混凝土局部承压计算满足要求!