09-23-2010, 03:14 PM
Hi Paladin,
Herein my contribution to overcome your problem.
1) How I know this failure is flexure failure or shear failure ?
>>as far as i knew, there is no auto feature to detect flexural-shear failure in sap2000 or etabs, hence you need to find out manually from the numerical output.
If the failure is shear failure :
2a) Does etabs already connect with etabs concrete design so that etabs already consider the shear capacity of concrete with shear reinforcement based on shear demand of element ( beam in this case ) ?
2b) Or etabs only "read" this beam as "pure concrete" ( concrete without shear reinforcement, because we can not add shear reinforcement ), then still need check separately as you told to me ( check shear capacity of concrete manually or use etabs conc. design & compare with shear force at a step of pushover ) ?
>>sap2000 or etabs has no auto flexural-shear hinge. you need to specify flexural-shear hinge manually. it is meant if you run nonlinear static analysis based on auto hinge from concrete design, the program gives you M2, M3, PMM hinges result only. see SapRefer.pdf file in your etabs or sap2000 folder for further.
I need suggestion based on your experience, do I need locate the "shear" pushover-hinge at both ends plus at mid span of beam/column OR only at both ends of beam/colum ?
>> for this question, I agree with the last sentence of ICEMAN84.
>> Hope it helps.
>> adekajeng
Herein my contribution to overcome your problem.
1) How I know this failure is flexure failure or shear failure ?
>>as far as i knew, there is no auto feature to detect flexural-shear failure in sap2000 or etabs, hence you need to find out manually from the numerical output.
If the failure is shear failure :
2a) Does etabs already connect with etabs concrete design so that etabs already consider the shear capacity of concrete with shear reinforcement based on shear demand of element ( beam in this case ) ?
2b) Or etabs only "read" this beam as "pure concrete" ( concrete without shear reinforcement, because we can not add shear reinforcement ), then still need check separately as you told to me ( check shear capacity of concrete manually or use etabs conc. design & compare with shear force at a step of pushover ) ?
>>sap2000 or etabs has no auto flexural-shear hinge. you need to specify flexural-shear hinge manually. it is meant if you run nonlinear static analysis based on auto hinge from concrete design, the program gives you M2, M3, PMM hinges result only. see SapRefer.pdf file in your etabs or sap2000 folder for further.
I need suggestion based on your experience, do I need locate the "shear" pushover-hinge at both ends plus at mid span of beam/column OR only at both ends of beam/colum ?
>> for this question, I agree with the last sentence of ICEMAN84.
>> Hope it helps.
>> adekajeng
.